ICD-10 I27.29
Billable / Specific HCC v28: 85Other secondary pulmonary hypertension
About ICD-10-CM I27.29
ICD-10-CM code I27.29 represents Other secondary pulmonary hypertension. This is a billable/specific code in the Circulatory System chapter (block I27). The 2026 edition of ICD-10-CM I27.29 became effective on October 1, 2025.
Coding Tips for I27.29
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
I27.29 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 I27.29. Per CMS ICD-10-CM Tabular 2026.
- Group 5 pulmonary hypertension
- Pulmonary hypertension with unclear multifactorial mechanisms
- Pulmonary hypertension due to hematologic disorders
- Pulmonary hypertension due to metabolic disorders
- Pulmonary hypertension due to other systemic disorders
Coding Notes
Code Also
- other associated disorders, if known, such as:
- chronic myeloid leukemia (C92.10-C92.22)
- essential thrombocythemia (D47.3)
- Gaucher disease (E75.22)
- hypertensive chronic kidney disease with end stage renal disease (I12.0, I13.11, I13.2)
- hyperthyroidism (E05.-)
- hypothyroidism (E00-E03)
- polycythemia vera (D45)
- sarcoidosis (D86.-)
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 I27.29
Local Coverage Determinations (LCDs) from CMS MACs that list I27.29 as a covered diagnosis.
Showing top 10 of 470 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I27.29.
1 Aetna
2 Cigna
5 Medicare
CPT Codes Commonly Billed with I27.29
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
Codes Adjacent To I27.29
Other codes in section I26-I28 (Pulmonary heart disease and diseases of pulmonary circulation).
ICD-10 I27.29, Billing FAQ
Is ICD-10 code I27.29 billable? +
Yes, I27.29 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 I27.29? +
ICD-10 I27.29 includes: Group 5 pulmonary hypertension; Pulmonary hypertension with unclear multifactorial mechanisms; Pulmonary hypertension due to hematologic disorders, and 2 more clinical synonyms.
Does I27.29 affect Medicare Advantage HCC risk adjustment? +
Yes. I27.29 maps to CMS-HCC v28 category 85. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What CPT codes are commonly billed with I27.29? +
Procedures frequently paired with I27.29 include: 94618, 94619, 94617.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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