I16
Hypertensive crisis
I16 is a non-billable ICD-10-CM code category for hypertensive crisis. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are I16.0 Hypertensive urgency; I16.1 Hypertensive emergency and I16.9 Hypertensive crisis, unspecified. Its coding notes include a Use additional code instruction, a Code also instruction, 2 Excludes1 entries and 11 Excludes2 entries.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
Hypertensive urgency, emergency or an unspecified crisis goes to category I16, and any identified hypertensive disease is coded as well.
Use additional code
Add the listed code as a secondary code, if known.
Code also
Two codes may be needed to describe the condition. This note gives no sequencing order.
- any identified hypertensive disease (I10-I15, I1A)
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (11 notes)
- hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
- 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.-)