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ICD-10-CM 2027 diagnosis code

H01.024Squamous blepharitis left upper eyelid

✓ Billable / specific

H01.024 is a valid, billable ICD-10-CM code for squamous blepharitis left upper eyelid. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 H01.024

H01.024 is the ICD-10-CM diagnosis code for squamous blepharitis left upper 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 H01.02 (squamous blepharitis), H01.024 is specifically for squamous blepharitis left upper eyelid. Related codes cover right upper eyelid (H01.021), right lower eyelid (H01.022), right eye, unspecified eyelid (H01.023), left lower eyelid (H01.025), left eye, unspecified eyelid (H01.026), unspecified eye, unspecified eyelid (H01.029), right eye, upper and lower eyelids (H01.02A) and left eye, upper and lower eyelids (H01.02B).

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 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 373.02 (squamous blepharitis).

Notes that apply from higher levels

Instructions written at a parent level also apply to H01.024.

› From H01.0 Blepharitis
Excludes1
  • blepharoconjunctivitis (H10.5-)

Broader instructions also apply from H00-H05 Disorders of eyelid, lacrimal system and orbit and Chapter 7: Diseases of the eye and adnexa.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to H01.024.

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 →
  • 373.02Squamous blepharitisapproximate

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 H01.024

Is H01.024 billable?

Yes. H01.024 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can H01.024 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict H01.024 as a principal diagnosis.

Is H01.024 a CC or MCC?

No. H01.024 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does H01.024 group to?

H01.024 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.

What is the ICD-9 code for H01.024?

The CMS General Equivalence Mappings map H01.024 to ICD-9-CM 373.02.