2026 ICD-10-CM Diagnosis Code H59.033Cystoid macular edema following cataract surgery, bilateral

ICD-10-CM Codes›H00–H59›H59›H59

ICD-10-CM H59.033
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H59.033 is a billable ICD-10-CM diagnosis code for cystoid macular edema following cataract surgery, bilateral. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 919 through 921. Coders also document this condition as bilateral cystoid macular edema of eyes due to and following cataract surgery. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative eye complication.

Code Identity

ICD-10-CM Code
H59.033
Billable Status
Yes — Valid for Submission
Code Describes
Cystoid macular edema following cataract surgery, bilateral
Short Description
Cystoid macular edema following cataract surgery, bilateral
Same as the full description in the CMS dataset.
Parent Code
H59.03
Cystoid macular edema following cataract surgery

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH59Intraoperative and postprocedural complications and disorders of eye and adnexa, not elsewhere classified
CategoryH59Intraoperative and postprocedural complications and disorders of eye and adnexa, not elsewhere classified
This CodeH59.033Cystoid macular edema following cataract surgery, bilateral

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral cystoid macular edema of eyes due to and following cataract surgery
  • Bilateral cystoid macular edema of retinas
  • Cystoid macular edema following cataract surgery
  • Cystoid macular edema of left eye due to and following cataract surgery
  • Cystoid macular edema of left retina
  • Cystoid macular edema of right eye due to and following cataract surgery
  • Cystoid macular edema of right retina
  • Macular edema of retina of bilateral eyes
  • Postoperative cystoid macular edema

Clinical ClassificationClinical

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

CCSR EYE011
Postprocedural or postoperative eye complication
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Cataract

A cataract is a clouding of the lens in your eye. It affects your vision. Cataracts are very common in older people. By age 80, more than half of all Americans either have a cataract or have had cataract surgery.

Read the full article at MedlinePlus

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

Convert H59.033 to ICD-9-CMHistory

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

ICD-9-CM
997.99 Surg compl-body syst 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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H59.033Overview

Is H59.033 (Cystoid macular edema following cataract surgery) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report cystoid macular edema following cataract surgery, bilateral on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H59.033 group to?

When cystoid macular edema following cataract surgery, bilateral is the principal diagnosis on an inpatient stay, it groups to MS-DRG 919, 920, 921, with relative weights from 0.6884 to 1.8308 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H59.033?

Under the General Equivalence Mappings, cystoid macular edema following cataract surgery, bilateral converts to ICD-9-CM 997.99 (surg compl-body syst NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.