2027 ICD-10-CM Diagnosis Code I77.3Arterial fibromuscular dysplasia
ICD-10-CM Codes›I00–I99›I70-I79›I77
- Billable — Valid for Submission
- Chronic Condition
I77.3 is a billable ICD-10-CM diagnosis code for arterial fibromuscular dysplasia. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 299 through 301. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified circulatory disease.
I77.3 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 108 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 108, ESRD (V21) category 108, and ESRD (V24) category 108 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
I77.3 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bilateral fibromuscular dysplasia of renal arteries
- Bilateral fibromuscular dysplasia of wall of carotid arteries
- Fibromuscular dysplasia of wall of artery
- Fibromuscular dysplasia of wall of carotid artery
- Fibromuscular dysplasia of wall of coronary artery
- Fibromuscular dysplasia of wall of intracranial artery
- Fibromuscular dysplasia of wall of left renal artery
- Fibromuscular dysplasia of wall of renal artery
- Fibromuscular dysplasia of wall of right renal artery
- Fibromuscular hyperplasia of left carotid artery
- Fibromuscular hyperplasia of right carotid artery
- Renal artery stenosis due to fibromuscular hyperplasia
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to I77.3: its own notes plus those printed at I77 and Chapter 9. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Fibromuscular hyperplasia (of) carotid artery
- Fibromuscular hyperplasia (of) renal artery
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Dysplasia See Also: Anomaly;
arterial, fibromuscular I77.3
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Fibromuscular Dysplasia
a disorder characterized by fibrous thickening of the arterial wall resulting in narrowing of the arterial lumen. it most often affects the renal artery and less often the carotid artery and abdominal arteries. it can cause hypertension and aneurysm formation.
Convert I77.3 to ICD-9-CMHistory
Code HistoryHistory
Questions About I77.3Overview
What is the ICD-10 code for arterial fibromuscular dysplasia?
The ICD-10-CM code for arterial fibromuscular dysplasia is I77.3 (sometimes written as I773). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is I77.3 (Other disorders of arteries and arterioles) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report arterial fibromuscular dysplasia on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does I77.3 group to?
When arterial fibromuscular dysplasia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 301, 300, 299, with relative weights from 0.7132 to 1.5840 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of I77.3?
Under the General Equivalence Mappings, arterial fibromuscular dysplasia converts to ICD-9-CM 447.3 (renal artery hyperplasia) and 447.8 (arterial disease NEC). The mapping is approximate, so confirm the match fits the documentation.
Does I77.3 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage. I77.3 mapped to HCC 108 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 108 (Vascular Disease), ESRD (V21) category 108 (Vascular Disease), and ESRD (V24) category 108 (Vascular Disease).
