Coding and coverage · ICD-10-CM

I16

I16.1 Hypertensive emergency

BillableNo payment HCCChapter 9
Check coverage with this diagnosis

Instructional notes

Chapter 9

Excludes2Not included here: the patient may have both; report both when both are present.
  • 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.-)

Section I10-I1A

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
  • neonatal hypertension (P29.2)
  • primary pulmonary hypertension (I27.0)
Excludes2Not included here: the patient may have both; report both when both are present.
  • hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
Use additional codeAdd a second code for the full picture.
  • code to identify:
  • exposure to environmental tobacco smoke (Z77.22)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

I16

Code also
  • any identified hypertensive disease (I10-I15, I1A)

This code

Code also
  • , if applicable, to identify specific organ dysfunction, such as:
  • acute kidney injury (N17.-)
  • acute myocardial infarction (I21.-)
  • acute pulmonary edema (left and/or right ventricular failure) (J81.0, I50.-)
  • aortic dissection (I71.0-)
  • cerebral hemorrhage (I60.-. I61.-, I62.-)
  • cerebral infarction (I63.-)
  • eclampsia (O15.-)
  • hypertensive encephalopathy (I67.4)
  • seizure (R56.9)

Chapter 9: Diseases of the circulatory system · I10-I1A Hypertensive diseases (I10-I1A)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.