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ICD-10-CM 2027 diagnosis code

H59.013Keratopathy (bullous aphakic) following cataract surgery, bilateral

✓ Billable / specificCC — complication/comorbidity

H59.013 is a valid, billable ICD-10-CM code for keratopathy (bullous aphakic) following cataract surgery, bilateral. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Keratopathy (bullous aphakic) following cataract surgery, bi

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About H59.013

H59.013 is the ICD-10-CM diagnosis code for keratopathy (bullous aphakic) following cataract surgery, bilateral. 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 H59.01 (keratopathy (bullous aphakic) following cataract surgery), H59.013 is specifically for keratopathy (bullous aphakic) following cataract surgery, bilateral. Related codes cover right eye (H59.011), left eye (H59.012) and unspecified eye (H59.019).

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 hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 997.99 (complications affecting other specified body systems, not elsewhere classified).

Notes that apply from higher levels

Instructions written at a parent level also apply to H59.013.

› From H59 Intraoperative and postprocedural complications and disorders of eye and adnexa, not elsewhere classified
Excludes1
  • mechanical complication of intraocular lens (T85.2)
  • mechanical complication of other ocular prosthetic devices, implants and grafts (T85.3)
  • pseudophakia (Z96.1)
  • secondary cataracts (H26.4-)

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.

ICD-9-CM equivalent

Converter →
  • 997.99Complications affecting other specified body systems, not elsewhere classifiedapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

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
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about H59.013

Is H59.013 billable?

Yes. H59.013 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can H59.013 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict H59.013 as a principal diagnosis.

Is H59.013 a CC or MCC?

H59.013 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does H59.013 group to?

H59.013 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 H59.013?

The CMS General Equivalence Mappings map H59.013 to ICD-9-CM 997.99.