ICD-10 I20.89
Billable / Specific HCC v28: 88Other forms of angina pectoris
About ICD-10-CM I20.89
ICD-10-CM code I20.89 represents Other forms of angina pectoris. This is a billable/specific code in the Circulatory System chapter (block I20). The 2026 edition of ICD-10-CM I20.89 became effective on October 1, 2025.
Coding Tips for I20.89
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
I20.89 is a CMS-HCC v28 risk-adjustment code (category 88). 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 I20.89. Per CMS ICD-10-CM Tabular 2026.
- Angina equivalent
- Angina of effort
- Coronary slow flow syndrome
- Stable angina
- Stenocardia
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 I20.89
Local Coverage Determinations (LCDs) from CMS MACs that list I20.89 as a covered diagnosis.
Showing top 10 of 693 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I20.89.
1 Aetna
5 Medicare
CPT Codes Commonly Billed with I20.89
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 92979 CMS LCD: Billing and Coding: Percutaneous Coronary Interventions CMS LCD
- C9607 CMS LCD: Billing and Coding: Percutaneous Coronary Interventions CMS LCD
- C9600 CMS LCD: Billing and Coding: Percutaneous Coronary Interventions CMS LCD
- 92937 CMS LCD: Billing and Coding: Percutaneous Coronary Interventions CMS LCD
- 92920 CMS LCD: Billing and Coding: Percutaneous Coronary Interventions CMS LCD
- C9608 CMS LCD: Billing and Coding: Percutaneous Coronary Interventions CMS LCD
- 92943 CMS LCD: Billing and Coding: Percutaneous Coronary Interventions CMS LCD
- C9601 CMS LCD: Billing and Coding: Percutaneous Coronary Interventions CMS LCD
- 92941 CMS LCD: Billing and Coding: Percutaneous Coronary Interventions CMS LCD
- 92973 CMS LCD: Billing and Coding: Percutaneous Coronary Interventions CMS LCD
Codes Adjacent To I20.89
Other codes in section I20-I25 (Ischemic heart diseases).
ICD-10 I20.89, Billing FAQ
Is ICD-10 code I20.89 billable? +
Yes, I20.89 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 I20.89? +
ICD-10 I20.89 includes: Angina equivalent; Angina of effort; Coronary slow flow syndrome, and 2 more clinical synonyms.
Does I20.89 affect Medicare Advantage HCC risk adjustment? +
Yes. I20.89 maps to CMS-HCC v28 category 88. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What CPT codes are commonly billed with I20.89? +
Procedures frequently paired with I20.89 include: 92979, C9607, C9600, 92937, 92920.
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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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