Crack the CDI Code

10/21/2026

Case Scenario of the Day: Follow the Functional Clues

You’re reviewing a chart when two words catch your attention: “bed bound.”

Before moving on, you open the PT and OT functional assessments:

📋 AM-PAC Daily Activity: 6/24
📋 AM-PAC Basic Mobility: 6/24

The assessments describe total assistance for all evaluated ADLs and mobility tasks. Nursing documentation also describes dependence on staff for repositioning and personal care.

The provider documents “weakness” but does not explain the extent or cause of the patient’s functional limitations.

💭 What diagnosis would you explore—and what additional information would you need before sending a query?

A. Generalized weakness
B. Physical deconditioning
C. Functional quadriplegia
D. Neurologic quadriplegia

Consider the patient’s baseline, the reason for the immobility, and whether these findings reflect a temporary limitation or an established condition.

👇 Share your answer and your next step!

Answer reveal tomorrow—with a sample compliant query!

10/21/2026

10/20 Answer Reveal: Same Heart, Different Acuity

✅ Correct answer: C. Query to reconcile the conflicting documentation and clarify the acuity of systolic CHF during this admission.

The hospitalist documented chronic systolic CHF, while cardiology repeatedly documented acute on chronic systolic CHF. The discharge summary repeated “chronic” without explaining whether an acute exacerbation had occurred.

That leaves an unresolved documentation conflict.

We should not automatically select cardiology’s diagnosis because of specialty expertise or assume the discharge summary’s wording resolves the disagreement.

And those clinical clues?

🔎 An unchanged EF does not exclude acute decompensation. EF describes systolic function; it does not independently establish whether heart failure is currently acute or chronic.

🔎 IV diuretics alone do not establish acute CHF. Treatment belongs in the clinical picture, but the provider must clarify the diagnosis.

🔎 Improvement before discharge does not erase an acute exacerbation that occurred earlier in the stay. The question concerns the entire admission.

📝 Example clarification query

In an actual query, include the dates and authors of the referenced documentation.

“The patient was admitted with NSTEMI and has known systolic heart failure. Hospitalist documentation describes ‘chronic systolic CHF,’ while cardiology documentation describes ‘acute on chronic systolic CHF.’ The discharge summary lists ‘chronic systolic CHF.’

Clinical findings and treatment during this admission include:
• Increased shortness of breath and mild bilateral lower-extremity edema on admission
• Mild pulmonary vascular congestion on chest X-ray
• EF 30–35%, unchanged from the prior echocardiogram
• IV furosemide for two days, followed by the usual oral dose

After reviewing the conflicting documentation and clinical course, please clarify the acuity of systolic heart failure during this admission:

• Chronic systolic heart failure without acute exacerbation
• Acute on chronic systolic heart failure
• Other diagnosis or clarification, please specify: ______
• Unable to determine”

💡 CDI takeaway: Even when a diagnosis is already documented, clarification may still be needed. Our opportunity here is to reconcile the conflicting descriptions so the record accurately reflects the patient’s condition.

💬 Have you encountered a case where everyone agreed the patient had CHF—but disagreed about its acuity?

10/20/2026

Case Scenario of the Day: Same Heart, Different Acuity

A 72-year-old patient with known systolic heart failure is admitted with an NSTEMI and undergoes cardiac catheterization with drug-eluting stent placement.

During your review, you find:

* Increased shortness of breath and mild bilateral lower-extremity edema on admission.
* Chest X-ray showing mild pulmonary vascular congestion.
* EF of 30–35%, unchanged from the previous echocardiogram.
* IV furosemide administered for two days, followed by the patient’s usual oral dose.

Here’s where the documentation takes two different roads:

🏥 Hospitalist: “Chronic systolic CHF. Continue home medications.”

🫀 Cardiologist: “Acute on chronic systolic CHF,” documented throughout the admission.

The discharge summary lists NSTEMI and chronic systolic CHF, without addressing the cardiologist’s documentation of an acute exacerbation.

🔎 What is your next step?

A. Capture chronic systolic CHF because it appears in the discharge summary.

B. Capture acute on chronic systolic CHF because cardiology documented it and the patient received IV diuretics.

C. Query to reconcile the conflicting documentation and clarify the acuity of systolic CHF during this admission.

D. Capture chronic systolic CHF because the EF did not change.

💬 Which would you choose—and why? Does an unchanged EF settle the question of acuity?

📣 Answer reveal tomorrow, including a compliant clarification query!

10/20/2026

🔎 Case Scenario Answer Reveal: A Nudge—and a New Diagnosis

Correct answer: C. Review the clinical significance, evaluation, treatment, and monitoring, along with the nudge’s content, and determine whether clarification is needed.

Our 2-year-old was admitted with dehydration due to viral gastroenteritis, had a sodium of 134 mEq/L, and the provider documented “hyponatremia due to hypovolemia” after an EHR nudge.

That diagnosis is clinically possible. Hypovolemia is consistent with the presenting dehydration, and a sodium of 134 can represent mild hyponatremia.

But a low number and a documented diagnosis don’t finish the review.

🧐 What should we look for?

• Was the sodium abnormality clinically evaluated?
• Did it affect fluid selection, treatment, or monitoring?
• What does the sodium trend show?
• Does it meet the criteria for reporting an additional diagnosis?
• Did the nudge present the relevant information neutrally and allow an appropriate provider response?

Treatment may overlap with treatment of dehydration. A separate medication or treatment is not required, but the record should establish how the condition affected care.

📝 If the completed review leaves clinical significance unclear, a clarification query could read:

“Your documentation dated [date] identifies ‘hyponatremia due to hypovolemia.’ The record also documents dehydration due to viral gastroenteritis and a serum sodium of 134 mEq/L on [date].

Please clarify the clinical significance of the documented hyponatremia for this admission:

• Hyponatremia is clinically significant; please specify the supporting clinical findings and/or how it affected care
• Low sodium finding without a clinically significant diagnosis of hyponatremia
• Other explanation—please specify
• Unable to determine”

💡 The teaching point: A nudge deserves the same compliance scrutiny as any other documentation clarification. Its name doesn’t settle the issue—and neither does the diagnosis it produces.

Validate the clinical story. Query when clarification is needed.

10/19/2026

Case Scenario of the Day: A Nudge—and a New Diagnosis

A 2-year-old is admitted with dehydration due to viral gastroenteritis.

During your review, you find:

🔹 Sodium: 134 mEq/L
🔹 An EHR “nudge” regarding hyponatremia
🔹 The provider subsequently documents “hyponatremia due to hypovolemia.”

The diagnosis now appears in the chart—but your review isn’t finished. 🤔

What is your next step?

A. Accept the diagnosis without further review because the provider documented it.

B. Request removal because a sodium of 134 cannot support hyponatremia.

C. Review the clinical significance, evaluation, treatment, and monitoring of the sodium abnormality, along with the nudge’s content, and determine whether clarification is needed.

D. Automatically exclude hyponatremia because it occurred with dehydration.

💬 Which answer would you choose—and what would you look for next?

Does the documentation reflect a clinically significant condition, and did the nudge follow compliant query principles?

📌 Answer reveal to follow tomorrow-with a compliant query example if clarification is indicated!

10/19/2026

CASE SCENARIO CONTINUED: One Question Answered… One Still Open

This case is an example of a complex case we see often that cannot be resolved first review or even 2nd review. Finding the right time and compliant way is the key.

Remember our patient whose medications, labs, and vital signs gave us clues before we ever read a provider note?

Two medications stood out: CellCept and Hizentra. What conditions were they treating?

As we continue reviewing the chart:

▪️ OT and PT both reference “autoimmune and immunodeficiency issues.”
▪️ The physician adds systemic lupus erythematosus (SLE) to the diagnosis list and documents treatment with Plaquenil and CellCept.
▪️ There is still no provider-documented diagnosis associated with Hizentra.

💡 What can we capture now?

We now have provider documentation supporting SLE, with ongoing treatment supporting its reportability for this admission. Code selection depends on the documented type and any associated organ involvement.

But we cannot assume lupus nephritis—or attribute the patient’s AKI to lupus—simply because SLE and an elevated creatinine appear in the same chart.

And the Hizentra? That question is still open.

The therapy notes give us a reason to investigate. They do not independently establish an immunodeficiency diagnosis for code assignment.

We also cannot assume the patient has common variable immunodeficiency or that an immune deficiency is caused by CellCept. A medication is a clue, not a diagnosis.

📝 Example clarification query

“The medication record lists Hizentra. OT and PT documentation reference ‘autoimmune and immunodeficiency issues.’ Your documentation identifies SLE treated with Plaquenil and CellCept; however, the indication for Hizentra and any associated diagnosis is not documented.

Based on your clinical judgment, please clarify the condition, if any, being treated with Hizentra:

▫️ Common variable immunodeficiency (CVID)
▫️ Immunodeficiency due to a drug—please specify the causative drug: __________
▫️ Other immunodeficiency—please specify: __________
▫️ Other condition being treated with Hizentra—please specify: __________
▫️ No current immunodeficiency
▫️ Unable to determine”

Query construction matters: Include CVID and drug-related immunodeficiency as choices only when the complete record supports them as reasonable possibilities. Review available immunology records for additional support before finalizing the query.

🎯 The takeaway: Our first review helped us identify questions. Continued review answered one—and showed us where clarification is still needed.

SLE, medication-related immunodeficiency, and primary immunodeficiency are distinct conditions. Documenting one does not automatically establish the others.

Would you have stopped after SLE was added, or kept following the Hizentra clue?

10/19/2026

10/18 🧩 CASE SCENARIO CONTINUED: VALIDATING THE DOCUMENTED DIAGNOSES

After reviewing the provider documentation, the suspected conditions were addressed as follows:

✅ Chronic systolic heart failure

The record documented chronic systolic heart failure. Entresto use and the presence of an AICD supported further investigation of chronic cardiac disease, but those clues alone did not establish the diagnosis.

When validating this condition, review the most recent echocardiogram, ejection fraction, cardiology documentation, baseline symptoms, home medications, and whether the patient had evidence of acute decompensation during this admission.

The available information supported chronic systolic heart failure, but the record did not necessarily establish acute on chronic systolic heart failure. Bilateral pleural effusions should be evaluated in context and should not automatically be attributed to heart failure without supporting documentation.

✅ Septic shock due to aspiration pneumonia

The patient had fever, leukocytosis, a right lower lobe infiltrate, hypotension, elevated lactate, tachycardia, tachypnea, respiratory failure, and acute kidney injury. The provider documented septic shock due to aspiration pneumonia.

This diagnosis connected the infectious source with the systemic response and associated organ dysfunction. Validation should include the clinical course, cultures, antibiotic treatment, aspiration risk, fluid resuscitation, vasopressor use, lactate response, and the provider’s explanation of the shock.

The initial blood pressure of 78/56 and lactate of 12.8 were important indicators of severity, but the diagnosis was not based on those values alone. The complete record, including treatment and provider documentation, supported the final diagnosis.

✅ Acute hypoxic respiratory failure with acute on chronic hypercapnic respiratory failure

The initial ABG on BiPAP at 40% FiO₂ showed:

pH 7.20 | PaCO₂ 77 | PaO₂ 55

The respiratory rate was 36, and the patient required noninvasive ventilatory support. These findings supported acute hypoxic respiratory failure and an acute worsening of chronic CO₂ retention.

The later ABG on 4 L nasal cannula showed:

pH 7.44 | PaCO₂ 55 | PaO₂ 123

The improved values reflected response to treatment and reduced support. They did not erase the severity of the initial presentation.

The provider documented acute hypoxic respiratory failure with acute on chronic hypercapnic respiratory failure. The chronic component should be supported by baseline information such as prior hypercapnia, chronic pulmonary disease, home oxygen or ventilatory support, elevated baseline bicarbonate, or previous ABGs.

Trelegy use alone would not establish chronic respiratory failure, but the provider’s documentation and the broader clinical history supported the diagnosis in this case.

✅ Chronic atrial fibrillation

Warfarin and amiodarone prompted investigation of a chronic arrhythmia. The provider documented chronic atrial fibrillation.

When validating this diagnosis, review the rhythm history, telemetry or ECG findings, anticoagulation plan, rate or rhythm control medications, and whether atrial fibrillation was persistent, paroxysmal, or chronic.

Warfarin may also be prescribed for other indications, so the medication list alone would not have been sufficient. In this case, the provider documentation established the diagnosis.

✅ AICD

The patient had an automatic implantable cardioverter-defibrillator. This finding was clinically relevant because it supported a history of significant cardiac disease and was consistent with the documented chronic systolic heart failure.

The AICD should be distinguished from a pacemaker unless the record documents both functions. Review the device history, indication, implantation date, recent interrogation, and any device-related issues during the admission.

The presence of an AICD does not independently establish the severity or current status of heart failure, but it provides important context for the patient’s cardiac history.

✅ Psoriatic arthritis

The provider documented psoriatic arthritis. Plaquenil and CellCept suggested an underlying autoimmune or inflammatory condition, but medications alone could not establish the specific diagnosis.

Validation should include rheumatology documentation, prior treatment history, joint or skin findings, and the clinical status of the disease during the admission. Unless the provider documented an active flare or related complication, the condition should remain classified as a chronic comorbidity rather than an acute exacerbation.

🔎 What remained unclear: CellCept and Hizentra

The record did not explain why the patient was taking CellCept or Hizentra.

CellCept may be used for transplant-related immunosuppression, autoimmune disease, or other immune-mediated conditions. Its presence does not establish lupus, transplant status, or any particular autoimmune diagnosis.

Hizentra may be used for primary immunodeficiency or chronic inflammatory demyelinating polyneuropathy, among other indications. Therefore, it should not automatically be interpreted as evidence of immunodeficiency.

Because the indications were not documented, these medications should have prompted further review rather than assumptions. Potential sources of clarification include the medication reconciliation, past medical history, rheumatology or immunology notes, neurology documentation, infusion records, transplant history, and the prescribing provider.

✍️ Was a query needed?

The documented diagnoses were sufficiently identified in the provider’s assessment:

* Chronic systolic heart failure
* Septic shock due to aspiration pneumonia
* Acute hypoxic respiratory failure with acute on chronic hypercapnic respiratory failure
* Chronic atrial fibrillation
* AICD
* Psoriatic arthritis

A query would not be appropriate merely because a medication indication was not immediately apparent. A compliant query could be considered only if the missing indication for CellCept or Hizentra affected the clinical understanding, risk adjustment, treatment, or reporting of a condition and the record contained enough supporting indicators to present a non-leading clarification.

💬 The key lesson is that the initial review generated possibilities, while the complete record established the diagnoses.

The medication list opened investigative pathways. The clinical findings demonstrated severity. The provider documentation connected the findings to the final diagnoses.

Recognize the pattern. Verify the context. Validate the documented diagnosis. Clarify only when the record supports a genuine documentation gap.

10/19/2026

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Register for this Upcoming Session on October 20, 2026 at 1:00 PM

10/19/2026

10/18 CASE SCENARIO ANSWER REVEAL: Before You Read the First Note

✅ Best answer: A!

This exercise was about building your “look for and validate” list before reading the provider’s assessment.

The other options identified reasonable possibilities—but each treated a clue as proof of something we haven’t established yet.

🔎 Here’s how to start connecting the data.

1️⃣ Infection, sepsis, and possible shock

Fever of 102°F, WBC peaking at 23, a right lower lobe infiltrate, tachycardia, and tachypnea raise concern for pneumonia and systemic infection.

Add BP 78/56, lactate 12.8, respiratory compromise, and renal dysfunction, and sepsis with associated organ dysfunction becomes a major focus of review.

What do we need next? Antibiotics, cultures, fluid administration, vasopressor use, response to resuscitation, and the provider’s assessment—including whether the organ dysfunction is attributed to sepsis.

Why not C? The initial hypotension and lactate warrant investigating shock. They do not, by themselves, establish its cause or confirm septic shock. Under Sepsis-3, the clinical construct includes vasopressor-dependent hypotension and lactate above 2 despite adequate volume resuscitation.

2️⃣ Acute respiratory failure—with chronicity still to investigate

On BiPAP at 40% FiO₂, the initial ABG was:

pH 7.20 | PaCO₂ 77 | PaO₂ 55

Combined with a respiratory rate of 36, these findings strongly support investigating acute hypoxic and hypercapnic respiratory failure.

The later ABG on 4 L nasal cannula shows improvement:

pH 7.44 | PaCO₂ 55 | PaO₂ 123

Why not B? Persistent hypercapnia raises a question about baseline CO₂ retention. It does not establish chronic respiratory failure. Trelegy use also does not establish it.

Review prior ABGs, baseline oxygen requirements, pulmonary history, bicarbonate levels, and any home ventilatory support.

3️⃣ Acute kidney injury

Creatinine increased from 2.4 to 3.2, then declined to 0.9. That is a significant renal trend requiring review of timing, prior renal function, urine output, treatment, and the provider’s explanation.

Why not D? An elevated admission creatinine does not establish CKD. Chronic kidney disease requires evidence of persistent kidney abnormalities for more than three months.

Also, hypotension plus AKI does not automatically establish ATN.

4️⃣ The medication list opens additional doors

💊 Entresto: Look for heart failure, its type, and cardiac function. Bilateral effusions warrant further evaluation, but do not independently establish acute decompensated heart failure.

💊 Warfarin and amiodarone: Consider an arrhythmia such as atrial fibrillation, while verifying each indication. Warfarin may instead relate to thromboembolic disease, a mechanical valve, or another condition.

💊 Plaquenil and CellCept: Investigate autoimmune disease, transplant history, and possible medication-related immunosuppression. These medications do not establish lupus.

💊 Hizentra: Investigate primary immune deficiency—but verify the indication because Hizentra is also used for CIDP.

💊 Trelegy and PRN albuterol: Look for COPD or asthma. Their presence does not establish an acute exacerbation.

💊 Losartan plus Entresto: Flag for medication reconciliation. Entresto already contains valsartan, another ARB.

5️⃣ Improvement does not erase the admission’s severity

Today’s normal blood pressure, improving creatinine, and lower oxygen support are part of the story.

So are the initial hypotension, acidemia, hypoxemia, hypercapnia, and elevated lactate.

Review the entire course, including what treatment produced that improvement.

✍️ What about a compliant query?

At this stage, we have not read the provider’s documentation. We cannot yet identify a specific documentation gap or write a well-supported query.

After reviewing the notes, determine what is already documented, what remains unclear, and whether the complete clinical picture supports clarification.

💬 The skill is entering the notes with informed questions—and allowing the record to change your initial impression.

Recognize the pattern. Verify the context. Identify the documentation opportunity. We will continue this case today and move on to compliant query based on missing information.

10/18/2026

CASE SCENARIO OF THE DAY: Before You Read the First Note

You open a chart and begin with the medications, vital signs, laboratory trends, and imaging.

Before reading the provider’s assessment, what diagnoses would you anticipate seeing addressed—and what would you need to validate?

💊 MEDICATION LIST

Losartan, Entresto, warfarin, amiodarone, Plaquenil, CellCept, Zosyn, Hizentra, Trelegy Ellipta, and albuterol as needed.

🔬 LABORATORY TRENDS
Earliest → most recent

• INR: 2.6
• Creatinine: 2.4 → 3.2 → 2.8 → 1.5 → 0.9 mg/dL
• WBC: 19.8 → 22 → 23 → 12 → 10
• Lactate: 12.8 → 7.8 → 5 → 2 → 1.0 mmol/L

🌡️ ON ARRIVAL

• Temperature: 102°F
• Heart rate: 136
• Respiratory rate: 36
• Blood pressure: 78/56
• Oxygen saturation: 93% on BiPAP at 40% FiO₂
• ABG on these settings: pH 7.20, PaCO₂ 77, PaO₂ 55

🌡️ CURRENTLY

• Temperature: 98°F
• Heart rate: 72
• Respiratory rate: 20
• Blood pressure: 126/74
• Oxygen saturation: 94% on 4 L nasal cannula
• ABG on 4 L: pH 7.44, PaCO₂ 55, PaO₂ 123

🩻 CHEST X-RAY

Bilateral pleural effusions, bilateral atelectasis, and a right lower lobe infiltrate.

❓ Which approach best connects these findings and guides your next steps?

A. Look for pneumonia, sepsis with possible shock, acute hypoxic and hypercapnic respiratory failure, and AKI. Explore possible chronic respiratory failure, heart failure, arrhythmia, autoimmune disease, and immune deficiency—but verify the baseline, medication indications, and treatment course.

B. Look for pneumonia, sepsis with possible shock, acute on chronic hypoxic and hypercapnic respiratory failure, and AKI. The persistent elevated PaCO₂ and Trelegy use establish the chronic respiratory component; verify the other suspected conditions.

C. Look for pneumonia, septic shock, acute hypoxic and hypercapnic respiratory failure, and AKI. The initial hypotension and lactate establish septic shock; verify the suspected chronic conditions and whether respiratory failure is acute on chronic.

D. Look for pneumonia, sepsis with possible shock, acute hypoxic and hypercapnic respiratory failure, and AKI on CKD. The elevated admission creatinine establishes underlying CKD; verify the suspected cardiac, pulmonary, autoimmune, and immune conditions.

💬 Choose A, B, C, or D. What additional information would you look for first?

The challenge is recognizing what the data suggest and where additional evidence is needed.

📣 Answer reveal tomorrow.