2024 ICD-10-CM Diagnosis Code Z67.91

Unspecified blood type, Rh negative

ICD-10-CM Code:
Z67.91
ICD-10 Code for:
Unspecified blood type, Rh negative
Is Billable?
Yes - Valid for Submission
Code Navigator:

Code Classification

  • Factors influencing health status and contact with health services
    (Z00–Z99)
    • Blood type
      (Z67)
      • Blood type
        (Z67)

Z67.91 is a billable diagnosis code used to specify a medical diagnosis of unspecified blood type, rh negative. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024. The code is exempt from present on admission (POA) reporting for inpatient admissions to general acute care hospitals.

This code describes a circumstance which influences the patient's health status but not a current illness or injury. The code is unacceptable as a principal diagnosis.

Unspecified diagnosis codes like Z67.91 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • History of RhD negative
  • Rh negative Du positive
  • Rh>mod< blood group phenotype
  • Rh>null< phenotype
  • Rr^-^ blood group phenotype
  • X^o^rX^o^r blood group phenotype

Clinical Classification

Clinical Information

  • ABO Blood Group|ABO Blood Type|ABO blood group system|ABO_Type

    a blood group system based on recognition of inherited differences in the h antigen as expressed on erythrocytes.
  • Blood Group A|A|Blood Type A

    a blood group indicating the presence on erythrocytes of only the a form of the h antigen.
  • Blood Group AB|AB|Blood Type AB

    a blood group indicating the presence on erythrocytes of both the a and b forms of the h antigen.
  • Blood Group B|B|Blood Type B

    a blood group indicating the presence on erythrocytes of only the b form of the h antigen.
  • Blood Group O|Blood Type O|O

    a blood group indicating the absence on erythrocytes of both the a and b forms of the h antigen.
  • Blood Group|Blood Type

    a classification of blood based on the presence or absence of inherited antigenic substances on the surface of erythrocytes.
  • Blood Type

    the specific reaction pattern of erythrocytes of an individual to the antisera of one blood group; e.g., the abo blood group consists of four major blood types: o, a, b, and ab. this classification depends on the presence or absence of two major antigens: a or b. type o occurs when neither is present and type ab when both are present. the blood type is the genetic phenotype of the individual for one blood group system and may be determined using different antisera available for testing.
  • Blood Type Determination

    a diagnostic test to classify the blood type of an individual. it is determined based on the presence or absence of certain antigens on the red blood cells surface.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10-CM Code Edits are applicable to this code:

  • 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)

Z67.91 is exempt from POA reporting - The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement. Review other POA exempt codes here.

CMS POA Indicator Options and Definitions

POA IndicatorReason for CodeCMS will pay the CC/MCC DRG?
YDiagnosis was present at time of inpatient admission.YES
NDiagnosis was not present at time of inpatient admission.NO
UDocumentation insufficient to determine if the condition was present at the time of inpatient admission.NO
WClinically undetermined - unable to clinically determine whether the condition was present at the time of inpatient admission.YES
1Unreported/Not used - Exempt from POA reporting. NO

Convert Z67.91 to ICD-9-CM

  • ICD-9-CM Code: -
    No Map Flag -

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.