ICD-10-CM 2027 diagnosis code
Z79.85Long-term (current) use of injectable non-insulin antidiabetic drugs
Z79.85 is a valid, billable ICD-10-CM code for long-term (current) use of injectable non-insulin antidiabetic drugs. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Lng trm (crnt) use injectable non-insulin antidiabetic drugs
Code last changed in FY2023 (effective October 1, 2022). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About Z79.85
Z79.85 is the ICD-10-CM diagnosis code for Long-term (current) use of injectable non-insulin antidiabetic drugs. It belongs to category Z79 (long term (current) drug therapy), block Z77-Z99 (persons with potential health hazards related to family and personal history and certain conditions influencing health status) and chapter 21 (factors influencing health status and contact with health services). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within Z79.8 (other long term (current) drug therapy), Z79.85 is specifically for Long-term (current) use of injectable non-insulin antidiabetic drugs. Related codes cover long term (current) use of agents affecting estrogen receptors and estrogen levels (Z79.81), long term (current) use of aspirin (Z79.82), long term (current) use of bisphosphonates (Z79.83), long term (current) use of oral hypoglycemic drugs (Z79.84) and other long term (current) drug therapy (Z79.89).
The conditions in its Excludes2 note aren't part of Z79.85, but may be coded alongside it if the patient has both: long term (current) use of insulin (Z79.4) and long term (current) use of oral hypoglycemic drugs (Z79.84).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 949 (Aftercare with CC/MCC, relative weight 1.123) and DRG 950 (Aftercare without CC/MCC, relative weight 0.7664), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.
It was added in FY2023, effective October 1, 2022.
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to Z79.85.
Alphabetic index entries
2 entriesTerms in the official ICD-10-CM index that lead to Z79.85.
Codes whose notes reference Z79.85
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 23 · Factors Influencing Health Status and Other Contacts with Health Services
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2023 (effective 10/1/2022): Added
- No changes since FY2023.
Common questions about Z79.85
Is Z79.85 billable?
- Yes. Z79.85 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z79.85 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z79.85 a CC or MCC?
- No. Z79.85 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does Z79.85 group to?
- Z79.85 is used in the MS-DRG v44.0 logic for MS-DRG 949 (Aftercare with CC/MCC) and MS-DRG 950 (Aftercare without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.