Z29.9 Encounter for prophylactic measures, unspecified

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applies from Z29 Encounter for other prophylactic measures

Excludes1 (never code together)

• desensitization to allergens (Z51.6)
• prophylactic surgery (Z40.-)

MS-DRG index

Defines the logic of DRG(s) 951 in MDC 23.

Approximate ICD-9-CM (GEMs)

• V07.9 Unspecified prophylactic or treatment measure (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.

Diagnosis Index entries for Z29.9

• Encounter (with health service) (for) › prophylactic measures

Nearby codes

• Z29.14 Encounter for prophylactic rabies immune globin
• Z29.3 Encounter for prophylactic fluoride administration
• Z29.8 Encounter for other specified prophylactic measures
• Z29.81 Encounter for HIV pre-exposure prophylaxis
• Z29.89 Encounter for other specified prophylactic measures
• Z29.9 Encounter for prophylactic measures, unspecified (this code)