2026 ICD-10-CM Diagnosis Code Z64.1Problems related to multiparity

ICD-10-CM Codes›Z00–Z99›Z55-Z65›Z64

ICD-10-CM Z64.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z64.1 is a billable ICD-10-CM diagnosis code for problems related to multiparity. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 742 through 743, 760 through 761. The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. Coders also document this condition as grand multipara. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Socioeconomic/psychosocial factors.

Code Identity

ICD-10-CM Code
Z64.1
Billable Status
Yes — Valid for Submission
Code Describes
Problems related to multiparity
Short Description
Problems related to multiparity
Same as the full description in the CMS dataset.
Parent Code
Z64
Problems related to certain psychosocial circumstances

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ55-Z65Persons with potential health hazards related to socioeconomic and psychosocial circumstances
CategoryZ64Problems related to certain psychosocial circumstances
This CodeZ64.1Problems related to multiparity

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z64.1.

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

Z64.1 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.

  • Grand multipara
  • Para 5
  • Para 6
  • Para 7
  • Parity eight
  • Parity nine
  • Parity ten or more
  • Psychosocial problems related to multiparity

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.

    • Grand multipara status only(not pregnant)
    • Multiparity(grand)
    • Problem(with) (related to)
      • multiparity

Clinical ClassificationClinical

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

CCSR FAC019
Socioeconomic/psychosocial factors
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Twins, Triplets, Multiple Births

If you are pregnant with more than one baby, you are far from alone. Multiple births are up in the United States. More women are having babies after age 30 and more are taking fertility drugs. Both boost the chance of carrying more than one baby. A family history of twins also makes multiples more likely.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Z64.1 to ICD-9-CMHistory

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

ICD-9-CM
V61.5 Multiparity
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 Z64.1Overview

Is Z64.1 (Problems related to certain psychosocial circumstances) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report problems related to multiparity on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does Z64.1 group to?

On inpatient claims, problems related to multiparity maps to MS-DRG 742, 743, 760, 761, with relative weights from 0.5696 to 1.8348 depending on complications. Higher weights mean higher Medicare reimbursement.

Can Z64.1 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because problems related to multiparity describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z64.1 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 problems related to multiparity on inpatient claims.

What is the ICD-9 equivalent of Z64.1?

Under the General Equivalence Mappings, problems related to multiparity converts to ICD-9-CM V61.5 (multiparity). The mapping is approximate, so confirm the match fits the documentation.