What does ICD-10 code Z79 mean?

ICD-10 code Z79 is the standardized code used for long term (current) drug therapy in medical records and coding systems.

When is ICD-10 code Z79 used?

Doctors, hospitals, and insurers may use ICD-10 code Z79 when recording long term (current) drug therapy in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code Z79 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code Z79: Long term (current) drug therapy

Name: ICD-10 Code Z79: Long term (current) drug therapy
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:51:10.748Z

Z79 is an ICD-10 diagnosis entry used to group records related to Long term (current) drug therapy. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Factors influencing health status and contact with health services (Z00-Z99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Factors influencing health status and contact with health services (Z00-Z99).

When is it used?

May be used when a clinician documents long term (current) drug therapy in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

21Factors influencing health status and contact with health services (Z00-Z99)

block

Z77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status

currentZ77-Z99

Official coding notes

Includes

long term (current) drug use for prophylactic purposes

Excludes2 (may code together if documented)

drug abuse and dependence (F11-F19)
drug use complicating pregnancy, childbirth, and the puerperium (O99.32-)

Code also

any therapeutic drug level monitoring (Z51.81)

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

General Physician

Sibling codes

Z77Other contact with and (suspected) exposures hazardous to health Z78Other specified health status Z80Family history of primary malignant neoplasm Z81Family history of mental and behavioral disorders Z82Family history of certain disabilities and chronic diseases (leading to disablement)Z83Family history of other specific disorders Z84Family history of other conditions Z85Personal history of malignant neoplasm Z86Personal history of certain other diseases Z87Personal history of other diseases and conditions Z88Allergy status to drugs, medicaments and biological substances Z89Acquired absence of limb Z90Acquired absence of organs, not elsewhere classified Z91Personal risk factors, not elsewhere classified Z92Personal history of medical treatment Z93Artificial opening status Z94Transplanted organ and tissue status Z95Presence of cardiac and vascular implants and grafts Z96Presence of other functional implants Z97Presence of other devices Z98Other postprocedural states Z99Dependence on enabling machines and devices, not elsewhere classified

Coding guidelines

Common synonyms

Long term (current) drug therapyLong termLong term current drug therapy

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.