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ICD-10-CM 2027 diagnosis code

H01.86Other specified inflammation of left eye, unspecified eyelid

✓ Billable / specific

H01.86 is a valid, billable ICD-10-CM code for other specified inflammation of left eye, unspecified eyelid. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2026 (effective October 1, 2025). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About H01.86

H01.86 is the ICD-10-CM diagnosis code for other specified inflammation of left eye, unspecified eyelid. It belongs to category H01 (other inflammation of eyelid), block H00-H05 (disorders of eyelid, lacrimal system and orbit) 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 H01.8, choose H01.86 (left eye, unspecified eyelid) only when documentation doesn't support a more specific option: right upper eyelid (H01.81), right lower eyelid (H01.82), right eye, unspecified eyelid (H01.83), left upper eyelid (H01.84), left lower eyelid (H01.85), unspecified eye, unspecified eyelid (H01.89), right eye, upper and lower eyelids (H01.8A) and left eye, upper and lower eyelids (H01.8B).

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 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471) and DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), in MDC 02 (Diseases and Disorders of the Eye), 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 was added in FY2026, effective October 1, 2025.

Notes that apply from higher levels

Instructions written at a parent level also apply to H01.86.

› From H01.8 Other specified inflammations of eyelid
Code also
  • , if applicable, infestation by Demodex mites (B88.01)

Broader instructions also apply from H00-H05 Disorders of eyelid, lacrimal system and orbit and 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.

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
  • FY2026 (effective 10/1/2025): Added
  • No changes since FY2026.

Common questions about H01.86

Is H01.86 billable?

Yes. H01.86 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can H01.86 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict H01.86 as a principal diagnosis.

Is H01.86 a CC or MCC?

No. H01.86 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does H01.86 group to?

H01.86 is used in the MS-DRG v44.0 logic for MS-DRG 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent) and MS-DRG 125 (Other Disorders of the Eye without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.