Z90.09 Acquired absence of other part of head and neck

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

Applicable to

• Acquired absence of nose

Excludes2 (not included here)

• teeth (K08.1)

Applies from Z90 Acquired absence of organs, not elsewhere classified

Includes

• postprocedural or post-traumatic loss of body part NEC

Excludes1 (never code together)

• congenital absence - see Alphabetical Index

Excludes2 (not included here)

• postprocedural absence of endocrine glands (E89.-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• V45.79 Other acquired absence of organ (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.

Code annotations containing back-references to Z90.09

Back-references to Z90

• Type 2 Excludes: M95 Other acquired deformities of musculoskeletal system and connective tissue ("acquired absence of limbs and organs (Z89-Z90)")
• Use Additional: Z08 Encounter for follow-up examination after completed treatment for malignant neoplasm ("code to identify any acquired absence of organs (Z90.-)")

Diagnosis Index entries for Z90.09

• Absence (of) (organ or part) (complete or partial) › head, part (acquired) NEC
• Absence (of) (organ or part) (complete or partial) › nose (congenital) › acquired

Nearby codes

• Z90 Acquired absence of organs, not elsewhere classified
• Z90.0 Acquired absence of part of head and neck
• Z90.01 Acquired absence of eye
• Z90.02 Acquired absence of larynx
• Z90.09 Acquired absence of other part of head and neck (this code)
• Z90.1 Acquired absence of breast and nipple
• Z90.10 Acquired absence of unspecified breast and nipple
• Z90.11 Acquired absence of right breast and nipple
• Z90.12 Acquired absence of left breast and nipple
• Z90.13 Acquired absence of bilateral breasts and nipples