Is ICD-10-CM code Z45 billable?

No, Z45 (Encounter for adjustment and management of implanted device) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code Z45 belong to?

Z45 belongs to Chapter 21 of the ICD-10-CM tabular list: Z00–Z99 (Factors Influencing Health Status and Contact with Health Services).

Z45Not billable, use a more specific code below

Encounter for adjustment and management of implanted device

In Encounters for other specific health care (Z40-Z53), chapter 21: Factors Influencing Health Status and Contact with Health Services

19 billable codes under Z45: none are a CC or MCC; none map to an HCC.

Instructional notes

Includes: conditions that are coded here

removal or replacement of implanted device

Excludes1: not coded here, use a different code

malfunction or other complications of device - see Alphabetical Index

Excludes2: not included here, code separately if applicable

encounter for fitting and adjustment of non-implanted device (Z46.-)

Also applies, from Encounters for other specific health care (Z40-Z53)

These notes sit on Z40-Z53 and apply to every code under it, including Z45.

Includes: conditions that are coded here

Categories Z40-Z53 are intended for use to indicate a reason for care. They may be used for patients who have already been treated for a disease or injury, but who are receiving aftercare or prophylactic care, or care to consolidate the treatment, or to deal with a residual state

Excludes2: not included here, code separately if applicable

follow-up examination for medical surveillance after treatment (Z08-Z09)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers when and how to use Z codes (Z00-Z99) for encounters and supplementary information, including contact, status, history, screening, aftercare, exams, and social determinants of health.

Use of Z Codes in Any Healthcare Setting (page 92)
Z Codes Indicate a Reason for an Encounter or Provide Additional Information about a Patient Encounter (page 93)
Categories of Z Codes (page 93)

Read Section I.C.21 (page 92)

All codes under Z45

Z45 can't be used on a claim. Pick a billable code below; grey headings group them.

Z45 MS-DRGs

As the principal diagnosis, the billable codes under Z45 group to these 13 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 951 Other Factors Influencing Health Status (6 of 19 codes)
DRG 314 Other Circulatory System Diagnoses with MCC (4 of 19 codes)
DRG 315 Other Circulatory System Diagnoses with CC (4 of 19 codes)
DRG 316 Other Circulatory System Diagnoses without CC/MCC (4 of 19 codes)
DRG 091 Other Disorders of Nervous System with MCC (3 of 19 codes)
DRG 092 Other Disorders of Nervous System with CC (3 of 19 codes)
DRG 093 Other Disorders of Nervous System without CC/MCC (3 of 19 codes)
DRG 154 Other Ear, Nose, Mouth and Throat Diagnoses with MCC (3 of 19 codes)
DRG 155 Other Ear, Nose, Mouth and Throat Diagnoses with CC (3 of 19 codes)
DRG 156 Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC (3 of 19 codes)
DRG 949 Aftercare with CC/MCC (2 of 19 codes)
DRG 950 Aftercare without CC/MCC (2 of 19 codes)
DRG 123 Neurological Eye Disorders (1 of 19 codes)

Other codes that refer to Z45

Notes on these codes point to Z45.

Z46 Excludes2: encounter for fitting and management of implanted devices (Z45.-)

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.