O16
Non-billableUnspecified maternal hypertension
Unspecified maternal hypertension
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Status
Non-billable / Header
Block
O10-O16
Child Codes
6
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- supervision of normal pregnancy (Z34.-)
Excludes 2
Conditions not included here, but the patient may have both
Use Additional Code
Additional codes that should follow this code
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Child Codes (6)
O16.1Unspecified maternal hypertension, first trimester
O16.2Unspecified maternal hypertension, second trimester
O16.3Unspecified maternal hypertension, third trimester
O16.4Unspecified maternal hypertension, complicating childbirth
O16.5Unspecified maternal hypertension, comp the puerperium
O16.9Unspecified maternal hypertension, unspecified trimester
Also Known As / Clinical Terms
Frequently Asked Questions
What is ICD-10 code O16?
ICD-10-CM code O16 represents "Unspecified maternal hypertension". It is a non-billable header code — use a more specific child code for billing purposes.
Is O16 a billable code?
No, O16 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 6 child codes under O16.
What chapter is O16 in?
O16 is in Chapter 15: Pregnancy, Childbirth and the Puerperium (codes O00-O9A).
What codes cannot be used with O16?
O16 has Excludes1 notes indicating codes that cannot be used together with it, including: supervision of normal pregnancy (Z34.-).
What are the subcategories under O16?
O16 has 6 child codes, including: O16.1 (Unspecified maternal hypertension, first trimester), O16.2 (Unspecified maternal hypertension, second trimester), O16.3 (Unspecified maternal hypertension, third trimester), O16.4 (Unspecified maternal hypertension, complicating childbirth), and 2 more.
Are additional codes required with O16?
Yes, when using O16 you should also code: code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known..
What are the UMLS CUIs for O16?
O16 is linked to 1 UMLS Concept Unique Identifier: C0495183. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.