ICD-10-CM 2027 diagnosis code
H59.321Postprocedural hemorrhage of right eye and adnexa following other procedure
H59.321 is a valid, billable ICD-10-CM code for postprocedural hemorrhage of right eye and adnexa following other procedure. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Postproc hemor of right eye and adnexa fol other procedure
Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About H59.321
H59.321 is the ICD-10-CM diagnosis code for postprocedural hemorrhage of right eye and adnexa following other procedure. It belongs to category H59 (intraoperative and postprocedural complications and disorders of eye and adnexa, not elsewhere classified), block H59 (intraoperative and postprocedural complications and disorders of eye and adnexa, not elsewhere classified) and chapter 7 (diseases of the eye and adnexa). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within H59.32, choose H59.321 (right eye and adnexa following other procedure) only when documentation doesn't support a more specific option: left eye and adnexa following other procedure (H59.322), bilateral (H59.323) and unspecified eye and adnexa following other procedure (H59.329).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 919 (Complications of Treatment with MCC, relative weight 1.763), DRG 920 (Complications of Treatment with CC, relative weight 0.9975) and DRG 921 (Complications of Treatment without CC/MCC, relative weight 0.6722), in MDC 21 (Injuries, Poisonings and Toxic Effects of Drugs), 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 has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2017 (title revised).
Before ICD-10, this condition was coded in ICD-9-CM as 998.11 (hemorrhage complicating a procedure).
Notes that apply from higher levels
Instructions written at a parent level also apply to H59.321.
Broader instructions also apply from Chapter 7: Diseases of the eye and adnexa.
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 21 · Injuries, Poisonings and Toxic Effects of Drugs
ICD-9-CM equivalent
Converter →- 998.11Hemorrhage complicating a procedureapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- FY2017 (effective 10/1/2016): Title revised — was “Postprocedural hemorrhage and hematoma of right eye and adnexa following other procedure”
Common questions about H59.321
Is H59.321 billable?
- Yes. H59.321 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can H59.321 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict H59.321 as a principal diagnosis.
Is H59.321 a CC or MCC?
- H59.321 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does H59.321 group to?
- H59.321 is used in the MS-DRG v44.0 logic for MS-DRG 919 (Complications of Treatment with MCC), MS-DRG 920 (Complications of Treatment with CC) and MS-DRG 921 (Complications of Treatment without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for H59.321?
- The CMS General Equivalence Mappings map H59.321 to ICD-9-CM 998.11.