2026 ICD-10-CM Diagnosis Code Z73.4Inadequate social skills, not elsewhere classified

ICD-10-CM Codes›Z00–Z99›Z69-Z76›Z73

ICD-10-CM Z73.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z73.4 is a billable ICD-10-CM diagnosis code for inadequate social skills, not elsewhere classified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Lifestyle/life management factors.

Code Identity

ICD-10-CM Code
Z73.4
Billable Status
Yes — Valid for Submission
Code Describes
Inadequate social skills, not elsewhere classified
Short Description
Inadequate social skills, not elsewhere classified
Same as the full description in the CMS dataset.
Parent Code
Z73
Problems related to life management difficulty

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ69-Z76Persons encountering health services in other circumstances
CategoryZ73Problems related to life management difficulty
This CodeZ73.4Inadequate social skills, not elsewhere classified

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z73.4.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

Z73.4 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Altered growth and development: social skills
  • Difficulty establishing relationships
  • Difficulty maintaining relationships
  • Finding related to ability to interact with others
  • Impaired social interaction
  • Impairment of psychological status
  • Inadequate social skills
  • Lack of stimulation
  • Minimal shared activities
  • Under-stimulation

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Inadequate, inadequacy
      • social
        • skills NEC
    • Social
      • skills inadequacy NEC

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR FAC020
Lifestyle/life management factors
Default principal diagnosis: inpatient No · outpatient Yes

Convert Z73.4 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V62.4 Social maladjustment
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z73.4Overview

Is Z73.4 (Problems related to life management difficulty) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report inadequate social skills, not elsewhere classified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z73.4 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because inadequate social skills, not elsewhere classified describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z73.4 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for inadequate social skills, not elsewhere classified on inpatient claims.

What is the ICD-9 equivalent of Z73.4?

Under the General Equivalence Mappings, inadequate social skills, not elsewhere classified converts to ICD-9-CM V62.4 (social maladjustment). The mapping is approximate, so confirm the match fits the documentation.