I24.81 — Acute coronary microvascular dysfunction
Is I24.81 billable?
Yes — I24.81 is billable for FY2027. I24.81 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. I24.81 may be submitted for encounters from October 1, 2026 through September 30, 2027.
I24.81 at a glance
| Code | I24.81 |
|---|---|
| Description | Acute coronary microvascular dysfunction |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does I24.81 group to?
I24.81 sits in MDC 05 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 311Angina Pectorismedical
As a secondary diagnosis, I24.81 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is I24.81 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to I24.81. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Dysfunction › coronary microvascular › acute
- Disease, diseased › coronary › microvascular › acute
Inclusion terms
Alternative wording in documentation that is classified to I24.81.
- Acute (presentation of) coronary microvascular disease
Excludes1 — never code together — inherited from I24
The conditions below can never be reported together with I24.81 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from I24.8
The conditions below can never be reported together with I24.81 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- myocardial infarction due to demand ischemia (I21.A1)
Excludes2 — not included here — inherited from Chapter 9
The conditions below are not part of I24.81, but a patient may have both at the same time. When documentation supports it, I24.81 and the excluded code may both 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.-)
Excludes2 — not included here — inherited from I24
The conditions below are not part of I24.81, but a patient may have both at the same time. When documentation supports it, I24.81 and the excluded code may both be reported.
- non-ischemic myocardial injury (I5A)
Code also — inherited from I20-I25
Two codes may be needed to describe the condition fully. Whether I24.81 is sequenced first depends on the reason for the encounter.
- the presence of hypertension (I10-I1A)
How long has I24.81 existed?
I24.81 first appears in FY2024.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.