2026 ICD-10-CM Diagnosis Code Z91.85Personal history of military service
Z91.85 is a billable ICD-10-CM diagnosis code for personal history of military service. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified status.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for Z91.85.
Present on Admission (POA)Billing
Z91.85 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Personal history of serving in the armed forces
- Personal history of veteran
Type 2 Excludes
- personal history of military deployment Z91.82
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- History
- personal (of) - See Also: History, family (of);
- military service - Z91.85
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- History
- personal (of)
- military service
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Code History & ChangesHistory
Replacement Z91.85 replaces the following previously assigned code(s):
- Z91.89 - Oth personal risk factors, not elsewhere classified
Questions About Z91.85Overview
Is Z91.85 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report personal history of military service on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Can Z91.85 be a principal diagnosis?
No. The Medicare Code Editor rejects this code as a principal diagnosis because personal history of military service describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.
Is Z91.85 exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for personal history of military service on inpatient claims.
