ICD-10-CM 2027 diagnosis code
N99.85Post endometrial ablation syndrome
N99.85 is a valid, billable ICD-10-CM code for post endometrial ablation syndrome. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code last changed in FY2020 (effective October 1, 2019). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About N99.85
N99.85 is the ICD-10-CM diagnosis code for post endometrial ablation syndrome. It belongs to category N99 (intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified), block N99 (intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified) and chapter 14 (diseases of the genitourinary system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within N99.8 (other intraoperative and postprocedural complications and disorders of genitourinary system), N99.85 is specifically for post endometrial ablation syndrome. Related codes cover other intraoperative complications of genitourinary system (N99.81), postprocedural hemorrhage of a genitourinary system organ or structure following a procedure (N99.82), residual ovary syndrome (N99.83), postprocedural hematoma and seroma of a genitourinary system organ or structure following a procedure (N99.84), intraoperative and postprocedural complications and disorders of breast (N99.86) and other postprocedural complications and disorders of genitourinary system (N99.89).
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 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 was added in FY2020, effective October 1, 2019.
Notes that apply from higher levels
Instructions written at a parent level also apply to N99.85.
Broader instructions also apply from Chapter 14: Diseases of the genitourinary system.
Alphabetic index entries
1 entriesTerms in the official ICD-10-CM index that lead to N99.85.
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.
MDC 13 · Diseases and Disorders of the Female Reproductive System
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2020 (effective 10/1/2019): Added
- No changes since FY2020.
Common questions about N99.85
Is N99.85 billable?
- Yes. N99.85 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N99.85 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N99.85 as a principal diagnosis.
Is N99.85 a CC or MCC?
- No. N99.85 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does N99.85 group to?
- N99.85 is used in the MS-DRG v44.0 logic for 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.