Z44.9 Encounter for fitting and adjustment of unspecified external prosthetic device

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

Applies from Z44 Encounter for fitting and adjustment of external prosthetic device

Includes

• removal or replacement of external prosthetic device

Excludes1 (never code together)

• malfunction or other complications of device - see Alphabetical Index
• presence of prosthetic device (Z97.-)

MS-DRG index

Defines the logic of DRG(s) 945-946 in MDC 23.

Approximate ICD-9-CM (GEMs)

• V52.9 Fitting and adjustment of unspecified prosthetic device

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 Z44.9

Back-references to Z44

• Type 1 Excludes: Z08 Encounter for follow-up examination after completed treatment for malignant neoplasm ("aftercare following medical care (Z43-Z49, Z51)")
• Type 1 Excludes: Z09 Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm ("aftercare following medical care (Z43-Z49, Z51)")
• Type 1 Excludes: Z09 Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm ("surveillance of prosthetic and other medical devices (Z44-Z46)")
• Type 2 Excludes: Z43 Encounter for attention to artificial openings ("fitting and adjustment of prosthetic and other devices (Z44-Z46)")
• Type 2 Excludes: Z48 Encounter for other postprocedural aftercare ("encounter for fitting and adjustment of prosthetic and other devices (Z44-Z46)")
• Type 2 Excludes: Z96 Presence of other functional implants ("fitting and adjustment of prosthetic and other devices (Z44-Z46)")
• Type 2 Excludes: Z97 Presence of other devices ("fitting and adjustment of prosthetic and other devices (Z44-Z46)")
• Type 2 Excludes: Z98 Other postprocedural states ("aftercare (Z43-Z49, Z51)")

Diagnosis Index entries for Z44.9

• Admission (for) › adjustment (of) › device NEC › prosthetic
• Admission (for) › adjustment (of) › prosthesis
• Admission (for) › fitting (of) › device NEC › prosthetic
• Admission (for) › fitting (of) › prosthesis
• Encounter (with health service) (for) › removal (of) › external › prosthesis, prosthetic device
• Fitting (and adjustment) (of) › device NOS › prosthetic (external)
• Fitting (and adjustment) (of) › prosthesis (external)
• Management (of) › prosthesis (external)
• Removal (from) (of) › external › prosthesis, prosthetic device

Nearby codes

• Z44.3 Encounter for fitting and adjustment of external breast prosthesis
• Z44.30 Encounter for fitting and adjustment of external breast prosthesis, unspecified breast
• Z44.31 Encounter for fitting and adjustment of external right breast prosthesis
• Z44.32 Encounter for fitting and adjustment of external left breast prosthesis
• Z44.8 Encounter for fitting and adjustment of other external prosthetic devices
• Z44.9 Encounter for fitting and adjustment of unspecified external prosthetic device (this code)