What is ICD-10 code J44.9?

J44.9 is the ICD-10-CM diagnosis code for 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. It belongs to the ICD-10-CM chapter for diseases of the respiratory system (j00-j99). J44.9 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. J44.9 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. J44.9 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. J44.9 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

What is the V28 vs V24 difference for J44.9?

CMS phased in the V28 risk adjustment model over payment years 2024 (33%), 2025 (67%), and 2026 (100%), replacing V24. V28 consolidates HCC categories, removes some lower-acuity conditions, and recalibrates RAF weights across the entire model. For J44.9, V28 maps to Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders at RAF 0.319 while V24 mapped to Chronic Obstructive Pulmonary Disease at RAF 0.335. Both models can still appear in legacy data and in payer-specific lookback periods.

What should coders know when reporting J44.9?

This is a non-specific code; query the provider if possible to determine whether the patient has emphysema, chronic bronchitis, or both Use only when documentation does not provide enough detail to assign a more specific COPD code Because J44.9 maps to a payment HCC, the documentation must also satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's risk adjustment score.

J44.9: Chronic obstructive pulmonary disease, unspecified — ICD-10 | Chronic Obstructive Pulmonary

ICD-10-CM Code View

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Code lookupJ44.9Effective periodFY2026 Apr Update (Apr 1-Sep 30)

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 Insight

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

CMS-HCC V28

Mapped

HCC 280

Chronic Obstructive Pulmonary...

RAF 0.319

CMS-HCC V24

Mapped

HCC 111

Chronic Obstructive Pulmonary...

RAF 0.335

ACA/HHS

Not risk-adjusted for this model/period.

RAF 0

ESRD/PACE

Not risk-adjusted for this model/period.

RAF 0

RXHCC

Mapped

HCC 229

COPD and Chronic Bronchitis

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

J44.8Other specified chronic obstructive pulmonary disease

Includes

Official

asthma with chronic obstructive pulmonary disease
chronic asthmatic (obstructive) bronchitis
chronic bronchitis with airway obstruction
chronic bronchitis with emphysema
chronic emphysematous bronchitis

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

type of asthma, if applicable (J45.-)

Buddy Documentation Tip

HCC Buddy guidance

Provider documentation clearly stating COPD or chronic obstructive pulmonary disease

Pulmonary function testing (spirometry) showing obstructive pattern: FEV1/FVC ratio below 0.70

Current symptom status: dyspnea, cough, sputum production, exercise tolerance

Current medications: bronchodilators, inhaled corticosteroids, oxygen therapy

MEAT Support

HCC Buddy guidance

Provider documentation clearly stating COPD or chronic obstructive pulmonary disease

Pulmonary function testing (spirometry) showing obstructive pattern: FEV1/FVC ratio below 0.70

Current symptom status: dyspnea, cough, sputum production, exercise tolerance

Current medications: bronchodilators, inhaled corticosteroids, oxygen therapy

Audit Caution

HCC Buddy guidance

Using J44.9 when an acute exacerbation is documented — should be J44.1

Using J44.9 when a concurrent infection is documented — should be J44.0 (possibly with J44.1 as well)

Coding COPD from a single abnormal pulmonary function test without provider confirmation of the diagnosis

Not capturing tobacco use disorder (F17.21x) or history of tobacco use (Z87.891) as additional codes

Common Mistakes

HCC Buddy guidance

J44.1 — COPD with acute exacerbation: use when there is documented acute worsening of symptoms

J44.0 — COPD with acute lower respiratory infection: use when a concurrent acute infection is documented

J43.9 — Emphysema, unspecified: emphysema is a component of COPD; provider may use either term

J42 — Unspecified chronic bronchitis: chronic bronchitis is a component of COPD

Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.

Is J44.9 an HCC code?

Yes. J44.9 maps to Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders under the CMS-HCC V28 risk adjustment model (and Chronic Obstructive Pulmonary Disease under V24).

HCC Category Mapping

V28HCC 280, Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders

0.319

V24HCC 111, Chronic Obstructive Pulmonary Disease

0.335

RxHCCHCC 229, COPD and Chronic Bronchitis

0.000

RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.

Work J44.9 in the Code Book — tabular path, V28 RAF, and MEAT checklist →

MEAT Criteria for J44.9

For J44.9to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.

MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
EEvaluate: test results, medication response, or physical findings reviewed by the provider
AAssess: explicit mention in the assessment or plan with acknowledgment of status
TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed J44.9 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

J44.9 is the ICD-10-CM diagnosis code for 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. J44.9 sits in the ICD-10-CM chapter for diseases of the respiratory system (j00-j99), within the section covering chronic lower respiratory diseases (j40-j4a).

Under the CMS-HCC V28 risk adjustment model, J44.9 maps to Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders (HCC 280) with a community, non-dual, aged base RAF weight of 0.319. Under the older CMS-HCC V24 model, J44.9 maps to Chronic Obstructive Pulmonary Disease (HCC 111) with a community, non-dual, aged base RAF weight of 0.335. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.

This is a non-specific code; query the provider if possible to determine whether the patient has emphysema, chronic bronchitis, or both. Because J44.9 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for J44.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•This is a non-specific code; query the provider if possible to determine whether the patient has emphysema, chronic bronchitis, or both
•Use only when documentation does not provide enough detail to assign a more specific COPD code

Clinical Significance

Chronic obstructive pulmonary disease, unspecified is the most commonly used COPD code, representing stable COPD without acute exacerbation or infection. COPD is a leading cause of morbidity and mortality worldwide and a significant driver of healthcare utilization, making its accurate capture essential for risk adjustment and population health management.

Documentation Requirements

✓Provider documentation clearly stating COPD or chronic obstructive pulmonary disease
✓Pulmonary function testing (spirometry) showing obstructive pattern: FEV1/FVC ratio below 0.70
✓Current symptom status: dyspnea, cough, sputum production, exercise tolerance
✓Current medications: bronchodilators, inhaled corticosteroids, oxygen therapy
✓Smoking status and history (pack-years)
✓GOLD stage classification if documented

Excludes 2, Not included here, may code separately

lung diseases due to external agents (J60-J70)

Commonly Confused Codes

•J44.1: COPD with acute exacerbation: use when there is documented acute worsening of symptoms
•J44.0: COPD with acute lower respiratory infection: use when a concurrent acute infection is documented
•J43.9: Emphysema, unspecified: emphysema is a component of COPD; provider may use either term
•J42: Unspecified chronic bronchitis: chronic bronchitis is a component of COPD
•J40: Bronchitis, not specified as acute or chronic: does not carry HCC weight