I20 — Angina pectoris
Is I20 billable?
No — I20 is a non-billable header code. I20 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 6 billable codes beneath I20.
I20 at a glance
| Code | I20 |
|---|---|
| Description | Angina pectoris |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with I20 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code
Report an additional code alongside I20 to fully describe the condition. I20 is sequenced first.
Excludes2 — not included here — inherited from Chapter 9
The conditions below are not part of I20, but a patient may have both at the same time. When documentation supports it, I20 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.-)
Code also — inherited from I20-I25
Two codes may be needed to describe the condition fully. Whether I20 is sequenced first depends on the reason for the encounter.
- the presence of hypertension (I10-I1A)
What codes fall under I20? (5)
How long has I20 existed?
I20 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with I20?
ICD-10-CM declares these codes mutually exclusive with I20 — exactly one of each pair can be correct for a given encounter.