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ICD-10-CM 2027 diagnosis code

Q51.22Partial doubling of uterus

✓ Billable / specificPOA exemptFemale only

Q51.22 is a valid, billable ICD-10-CM code for partial doubling of uterus. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2021 (effective October 1, 2020). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Q51.22

Q51.22 is the ICD-10-CM diagnosis code for partial doubling of uterus. It belongs to category Q51 (congenital malformations of uterus and cervix), block Q50-Q56 (congenital malformations of genital organs) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within Q51.2 (other doubling of uterus), Q51.22 is specifically for partial doubling of uterus. Related codes cover complete doubling of uterus (Q51.21) and other and unspecified doubling of uterus (Q51.28).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 742 (Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC, relative weight 1.8456), DRG 743 (Uterine and Adnexa Procedures for Non-Malignancy without CC/MCC, relative weight 1.2974), DRG 760 (Menstrual and Other Female Reproductive System Disorders with CC/MCC, relative weight 1.0129) and DRG 761 (Menstrual and Other Female Reproductive System Disorders without CC/MCC, relative weight 0.7041), in MDC 13 (Diseases and Disorders of the Female Reproductive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It is on the CMS list of diagnoses consistent only with female patients (the sex-conflict edit itself was retired in FY2025).

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

It was added in FY2019, effective October 1, 2018, and changed in FY2021.

Coding notes

Applicable toConditions and synonyms classified to this code
  • Partial septate uterus

Notes that apply from higher levels

Instructions written at a parent level also apply to Q51.22.

Broader instructions also apply from Q50-Q56 Congenital malformations of genital organs and Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to Q51.22.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2019 (effective 10/1/2018): Added
  • FY2021 (effective 10/1/2020): Title revised — was “Other partial doubling of uterus”

Common questions about Q51.22

Is Q51.22 billable?

Yes. Q51.22 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Q51.22 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Q51.22 as a principal diagnosis.

Is Q51.22 a CC or MCC?

No. Q51.22 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does Q51.22 group to?

Q51.22 is used in the MS-DRG v44.0 logic for MS-DRG 742 (Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC), MS-DRG 743 (Uterine and Adnexa Procedures for Non-Malignancy without CC/MCC), MS-DRG 760 (Menstrual and Other Female Reproductive System Disorders with CC/MCC) and MS-DRG 761 (Menstrual and Other Female Reproductive System Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.