ICD-10 I1A.0
Billable / SpecificResistant hypertension
About ICD-10-CM I1A.0
ICD-10-CM code I1A.0 represents Resistant hypertension. This is a billable/specific code in the Circulatory System chapter (block I1A). The 2026 edition of ICD-10-CM I1A.0 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under I1A.0. Per CMS ICD-10-CM Tabular 2026.
- Apparent treatment resistant hypertension
- Treatment resistant hypertension
- True resistant hypertension
Coding Notes
Code First
- specific type of existing hypertension, if known, such as:
- essential hypertension (I10)
- secondary hypertension (I15.-)
Medicare LCD Coverage for I1A.0
Local Coverage Determinations (LCDs) from CMS MACs that list I1A.0 as a covered diagnosis.
Showing top 10 of 125 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I1A.0.
5 Medicare
CPT Codes Commonly Billed with I1A.0
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 36254 CMS LCD: Billing and Coding: Diagnostic Abdominal Aortography and Renal Angiography CMS LCD
- 36252 CMS LCD: Billing and Coding: Diagnostic Abdominal Aortography and Renal Angiography CMS LCD
- 36247 CMS LCD: Billing and Coding: Diagnostic Abdominal Aortography and Renal Angiography CMS LCD
- 75630 CMS LCD: Billing and Coding: Diagnostic Abdominal Aortography and Renal Angiography CMS LCD
- G0278 CMS LCD: Billing and Coding: Diagnostic Abdominal Aortography and Renal Angiography CMS LCD
- 36253 CMS LCD: Billing and Coding: Diagnostic Abdominal Aortography and Renal Angiography CMS LCD
- 75726 CMS LCD: Billing and Coding: Diagnostic Abdominal Aortography and Renal Angiography CMS LCD
- 36245 CMS LCD: Billing and Coding: Diagnostic Abdominal Aortography and Renal Angiography CMS LCD
- 36251 CMS LCD: Billing and Coding: Diagnostic Abdominal Aortography and Renal Angiography CMS LCD
- 75625 CMS LCD: Billing and Coding: Diagnostic Abdominal Aortography and Renal Angiography CMS LCD
Codes Adjacent To I1A.0
Other codes in section I10-I1A (Hypertensive diseases).
ICD-10 I1A.0, Billing FAQ
Is ICD-10 code I1A.0 billable? +
Yes, I1A.0 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 I1A.0? +
ICD-10 I1A.0 includes: Apparent treatment resistant hypertension; Treatment resistant hypertension; True resistant hypertension.
What CPT codes are commonly billed with I1A.0? +
Procedures frequently paired with I1A.0 include: 36254, 36252, 36247, 75630, G0278.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on August 31, 2026.
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