Z46.51 Encounter for fitting and adjustment of gastric lap band

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

Applies from Z46 Encounter for fitting and adjustment of other devices

Includes

• removal or replacement of other device

Excludes1 (never code together)

• malfunction or other complications of device - see Alphabetical Index

Excludes2 (not included here)

• encounter for fitting and management of implanted devices (Z45.-)
• issue of repeat prescription only (Z76.0)
• presence of prosthetic and other devices (Z95-Z97)

Applies from Z46.5 Encounter for fitting and adjustment of other gastrointestinal appliance and device

Excludes1 (never code together)

• encounter for attention to artificial openings of digestive tract (Z43.1-Z43.4)

MS-DRG index

Defines the logic of DRG(s) 393-395 in MDC 06.

Approximate ICD-9-CM (GEMs)

• V53.51 Fitting and adjustment of gastric lap band

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 Z46.51

Back-references to Z46

• 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: Z45 Encounter for adjustment and management of implanted device ("encounter for fitting and adjustment of non-implanted device (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 Z46.51

• Fitting (and adjustment) (of) › gastric lap band

Nearby codes

• Z46.1 Encounter for fitting and adjustment of hearing aid
• Z46.2 Encounter for fitting and adjustment of other devices related to nervous system and special senses
• Z46.3 Encounter for fitting and adjustment of dental prosthetic device
• Z46.4 Encounter for fitting and adjustment of orthodontic device
• Z46.5 Encounter for fitting and adjustment of other gastrointestinal appliance and device
• Z46.51 Encounter for fitting and adjustment of gastric lap band (this code)
• Z46.59 Encounter for fitting and adjustment of other gastrointestinal appliance and device
• Z46.6 Encounter for fitting and adjustment of urinary device
• Z46.8 Encounter for fitting and adjustment of other specified devices
• Z46.81 Encounter for fitting and adjustment of insulin pump
• Z46.82 Encounter for fitting and adjustment of non-vascular catheter