I10 — Essential (primary) hypertension
Is I10 billable?
Yes — I10 is billable for FY2027. I10 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. I10 may be submitted for encounters from October 1, 2026 through September 30, 2027.
I10 at a glance
| Code | I10 |
|---|---|
| Description | Essential (primary) hypertension |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to I10?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name I10 directly.
CMS does not consider this code, on its own, sufficient justification for admission to an acute care hospital when reported as the principal diagnosis.
How is I10 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to I10. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)
Excludes1 — never code together
The conditions below can never be reported together with I10 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here
The conditions below are not part of I10, but a patient may have both at the same time. When documentation supports it, I10 and the excluded code may both be reported.
Includes
Conditions classified to I10.
- high blood pressure
- hypertension (arterial) (benign) (essential) (malignant) (primary) (systemic)
Excludes1 — never code together — inherited from I10-I1A
The conditions below can never be reported together with I10 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 — inherited from I10-I1A
Report an additional code alongside I10 to fully describe the condition. I10 is sequenced first.
Excludes2 — not included here — inherited from Chapter 9
The conditions below are not part of I10, but a patient may have both at the same time. When documentation supports it, I10 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 I10-I1A
The conditions below are not part of I10, but a patient may have both at the same time. When documentation supports it, I10 and the excluded code may both be reported.
How long has I10 existed?
I10 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 I10?
ICD-10-CM declares these codes mutually exclusive with I10 — exactly one of each pair can be correct for a given encounter.