What does the HCC Buddy ICD-10 encoder do?

The HCC Buddy ICD-10-CM encoder is a searchable HCC coder tool for risk adjustment coders. It maps diagnosis codes to CMS-HCC V28, V24, ESRD, and RxHCC categories, shows RAF weights, explains billable status, and links coding details to MEAT documentation guidance. Reviewed: April 25, 2026. Updated for FY2026 ICD-10-CM and CMS-HCC V28.

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ICD-10-CM Code View

HCC Buddy Code Card

Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.

FY 2026 Apr update / Diseases of the respiratory system (J00-J99) / Chronic lower respiratory diseases (J40-J4A)

J44.9

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Chronic obstructive pulmonary disease, unspecified

A chronic lung disease (COPD) that causes airflow obstruction and breathing difficulty, but the specific type or characteristics are not documented.

Buddy the Bee presenting code insight

Buddy Insight

Chronic obstructive pulmonary disease, unspecified is the most commonly used COPD code, representing stable COPD without acute exacerbation or infection.

CMS-HCC V28

HCC 280

RAF 0.334

CMS-HCC V24

HCC 111

RAF 0.334

ACA/HHS

0

0

RAF 0

ESRD/PACE

0

0

RAF 0

RXHCC

HCC 229

RAF 0.0

Code Trumping

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Code Book Path

Official
J44Other chronic obstructive pulmonary disease
J44.9Chronic obstructive pulmonary disease, unspecified

Inclusion Terms

Official
  • Chronic obstructive airway disease NOS
  • Chronic obstructive lung disease NOS

Excludes 2

Official
  • lung diseases due to external agents (J60-J70)

Related Child Codes

Official
J44.0Chronic obstructive pulmonary disease with (acute) lower respiratory infection
J44.1Chronic obstructive pulmonary disease with (acute) exacerbation
J44.89Other specified chronic obstructive pulmonary disease

Includes

Official

ICD-10-CM does not list Includes notes for J44.9 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for J44.9 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for J44.9 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for J44.9 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for J44.9 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance
Provider documentation clearly stating COPD or chronic obstructive pulmonary disease
Current symptom status such as dyspnea, cough, sputum production, or exercise tolerance
Current medications such as bronchodilators, inhaled corticosteroids, or oxygen therapy

MEAT Support

HCC Buddy guidance
Provider documentation clearly stating COPD or chronic obstructive pulmonary disease
Current symptom status such as dyspnea, cough, sputum production, or exercise tolerance
Current medications such as bronchodilators, inhaled corticosteroids, or oxygen therapy

Audit Caution

HCC Buddy guidance
Do not use J44.9 when documentation supports acute exacerbation, acute lower respiratory infection, or a more specific COPD type.

Common Mistakes

HCC Buddy guidance
J44.1, COPD with acute exacerbation, when acute worsening is documented
J44.0, COPD with acute lower respiratory infection, when a concurrent acute infection is documented

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Type a description or paste an ICD-10-CM code and see its HCC category mapping, RAF, the MEAT support it needs, clinical details, and Excludes notes. Covers 72,000+ ICD-10-CM codes with Ask Buddy. Updated for fiscal year 2026.

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What Makes HCC Buddy Different

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ICD-10-CM to HCC, mapping first

V24 and V28 Dual HCC Mapping

See both CMS-HCC model versions side by side for every billable ICD-10-CM code. RAF weights included.

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Ask about MEAT criteria, coding guidelines, Excludes note conflicts, and HCC category questions.

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Search 9.37 million providers by name, NPI number, specialty, or location without leaving the encoder.

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Drug-to-Diagnosis Reference

Look up any medication and see associated ICD-10-CM diagnosis codes for accurate coding.

RAF Score Calculator

Calculate risk adjustment factor scores with demographic inputs and HCC category selections.

Smart Notes

Attach coding notes to any ICD-10-CM code. Type shorthand and clean the structure before export.

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