ICD-10-CM 2027 diagnosis code
Z79.01Long term (current) use of anticoagulants
Z79.01 is a valid, billable ICD-10-CM code for long term (current) use of anticoagulants. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Long-term anticoagulant use.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About Z79.01
Z79.01 is the ICD-10-CM diagnosis code for long term (current) use of anticoagulants. 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 Z79.0 (long term (current) use of anticoagulants and antithrombotics/antiplatelets), Z79.01 is specifically for long term (current) use of anticoagulants. Related codes cover antithrombotics/antiplatelets (Z79.02).
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 exempt from present-on-admission (POA) reporting, so no POA indicator is required.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as V58.61 (Long-term (current) use of anticoagulants).
Notes that apply from higher levels
Instructions written at a parent level also apply to Z79.01.
› From Z79.0 Long term (current) use of anticoagulants and antithrombotics/antiplatelets
- long term (current) use of aspirin (Z79.82)
Broader instructions also apply from 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.
Alphabetic index entries
2 entriesTerms in the official ICD-10-CM index that lead to Z79.01.
Codes whose notes reference Z79.01
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
ICD-9-CM equivalent
Converter →- V58.61Long-term (current) use of anticoagulantsexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about Z79.01
Is Z79.01 billable?
- Yes. Z79.01 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z79.01 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Z79.01 as a principal diagnosis.
Is Z79.01 a CC or MCC?
- No. Z79.01 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does Z79.01 group to?
- Z79.01 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.