2027 ICD-10-CM Diagnosis Code Z31.82Encounter for Rh incompatibility status

ICD-10-CM Codes›Z00–Z99›Z30-Z39›Z31

ICD-10-CM Z31.82
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Z31.82 is a billable ICD-10-CM diagnosis code for encounter for Rh incompatibility status. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 951. 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 Contraceptive and procreative management.

Code Identity

ICD-10-CM Code
Z31.82
Billable Status
Yes — Valid for Submission
Code Describes
Encounter for Rh incompatibility status
Short Description
Encounter for Rh incompatibility status
Same as the full description in the CMS dataset.
Parent Code
Z31.8
Encounter for other procreative management

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ30-Z39Persons encountering health services in circumstances related to reproduction
CategoryZ31Encounter for procreative management
This CodeZ31.82Encounter for Rh incompatibility status

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z31.82.

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

Z31.82 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Persons encountering health services in circumstances related to reproduction (Z30-Z39).

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Z31.82: its own notes plus those printed at Z31 and Chapter 21. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Z31 Encounter for procreative management applies to 20 codes
  • complications associated with artificial fertilization (N98.-)
  • female infertility (N97.-)
  • male infertility (N46.-)

Notes

General instructions on how these codes are used.

From Chapter 21 (Z00-Z99) Factors influencing health status and contact with health services applies to 1,425 codes
  • Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
  • (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
  • (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Z31.82, its category, or a range that includes it.

Excludes2 3

These codes carry an Excludes2 note naming Z31.82: its condition is not part of those codes, and both may be reported when the patient has both.

  • Block Z00-Z13 Persons encountering health services for examinations
    examinations related to pregnancy and reproduction (Z30-Z36, Z39.-) names Z30-Z36, which includes this code
  • Z70 Counseling related to sexual attitude, behavior and orientation
    contraceptive or procreative counseling (Z30-Z31) names Z30-Z31, which includes this code
  • Z71 Persons encountering health services for other counseling and medical advice, not elsewhere classified
    contraceptive or procreation counseling (Z30-Z31) names Z30-Z31, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR FAC013
Contraceptive and procreative management
Default principal diagnosis: inpatient No · outpatient Yes

Patient EducationClinical

Rh Incompatibility

There are four major blood types: A, B, O, and AB. The types are based on substances found on your blood cells. Your blood type also has a positive or negative sign. This is called Rh factor, which is a protein. If your blood cells have this protein, you are Rh-positive. If you don't, you are Rh-negative.

The full article covers:

  • What is the Rh factor?
  • What is Rh incompatibility?
  • How is Rh incompatibility diagnosed?
  • How is Rh incompatibility treated?
  • Can Rh incompatibility be prevented?

Read the full article at MedlinePlus

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

Convert Z31.82 to ICD-9-CMHistory

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

ICD-9-CM
V26.89 Procreative managemt NEC
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Z31.82Overview

What is the ICD-10 code for encounter for Rh incompatibility status?

The ICD-10-CM code for encounter for Rh incompatibility status is Z31.82 (sometimes written as Z3182). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is Z31.82 (Encounter for other procreative management) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report encounter for Rh incompatibility status on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does Z31.82 group to?

On inpatient claims, encounter for Rh incompatibility status maps to MS-DRG 951 (other Factors Influencing Health Status), which carries a relative weight of 0.5574. Higher weights mean higher Medicare reimbursement.

Can Z31.82 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because encounter for Rh incompatibility status describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z31.82 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 encounter for Rh incompatibility status on inpatient claims. The code appears in the Persons encountering health services in circumstances related to reproduction (Z30-Z39) range of the CMS exempt list.