ICD-10 I27.9
Billable / Specific HCC v28: 85Pulmonary heart disease, unspecified
About ICD-10-CM I27.9
ICD-10-CM code I27.9 represents Pulmonary heart disease, unspecified. This is a billable/specific code in the Circulatory System chapter (block I27). The 2026 edition of ICD-10-CM I27.9 became effective on October 1, 2025.
Coding Tips for I27.9
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
I27.9 is a CMS-HCC v28 risk-adjustment code (category 85). To count for the patient Risk Adjustment Factor (RAF), document the diagnosis with MEAT language each calendar year: Monitored, Evaluated, Assessed, Treated. A diagnosis on the problem list alone does not satisfy CMS RADV audit standards. Include the diagnosis in the assessment with current status and current treatment plan.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under I27.9. Per CMS ICD-10-CM Tabular 2026.
- Chronic cardiopulmonary disease
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Medicare LCD Coverage for I27.9
Local Coverage Determinations (LCDs) from CMS MACs that list I27.9 as a covered diagnosis.
Showing top 10 of 254 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I27.9.
3 Aetna
2 Cigna
5 Medicare
CPT Codes Commonly Billed with I27.9
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
Convert I27.9 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| I27.9 | 4169 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I27.9
Other codes in section I26-I28 (Pulmonary heart disease and diseases of pulmonary circulation).
ICD-10 I27.9, Billing FAQ
Is ICD-10 code I27.9 billable? +
Yes, I27.9 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to I27.9? +
ICD-10 I27.9 includes: Chronic cardiopulmonary disease.
Does I27.9 affect Medicare Advantage HCC risk adjustment? +
Yes. I27.9 maps to CMS-HCC v28 category 85. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What CPT codes are commonly billed with I27.9? +
Procedures frequently paired with I27.9 include: 94618, 94619, 94617.
What ICD-9 codes does I27.9 map to? +
Per CMS GEMs, I27.9 maps to ICD-9 codes: 4169. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 16, 2026.
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