2027 ICD-10-CM Diagnosis Code H01.9Unspecified inflammation of eyelid

ICD-10-CM Codes›H00–H59›H00-H05›H01

ICD-10-CM H01.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H01.9 is a billable ICD-10-CM diagnosis code for unspecified inflammation of eyelid. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 124 through 125. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cornea and external disease and Oculofacial plastics and orbital conditions.

Code Identity

ICD-10-CM Code
H01.9
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified inflammation of eyelid
Short Description
Unspecified inflammation of eyelid
Same as the full description in the CMS dataset.
Parent Code
H01
Other inflammation of eyelid

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH00-H05Disorders of eyelid, lacrimal system and orbit
CategoryH01Other inflammation of eyelid
This CodeH01.9Unspecified inflammation of eyelid

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Blister of eyelid with infection
  • Blister of face with infection
  • Blister of left eyelid with infection
  • Blister of right eyelid with infection
  • Collarettes of lash follicles
  • Eyelash follicle finding
  • Herpes zoster infection of eyelid
  • Infection of eyelid caused by Mycobacterium tuberculosis complex
  • Infection of skin of eyelid and periocular region
  • Inflammation of eyelid
  • Inflammatory lesion of eyelid
  • Perioral dermatitis with periocular dermatitis
  • Yaws of eyelid

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H01.9: its own notes plus those printed at block H00-H05 and Chapter 7. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Inflammation of eyelid NOS

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block H00-H05 Disorders of eyelid, lacrimal system and orbit applies to 574 codes
From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury (trauma) of eye and orbit (S05.-)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)

Notes

General instructions on how these codes are used.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR EYE001
Cornea and external disease
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR EYE008
Oculofacial plastics and orbital conditions
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Eyelid Disorders

Eyelid disorders include a variety of conditions that affect your eyelids. Your eyelids protect your eyes and help keep them healthy. When you blink, they spread tears across your eyes and help wash away dirt or dust. You also close your eyelids when something comes near your eyes to protect them from injury.

The full article covers:

  • What are eyelid disorders?
  • What causes eyelid disorders?
  • What are common eyelid disorders?
  • What are the symptoms of eyelid disorders?
  • How are eyelid disorders diagnosed?
  • How are eyelid disorders treated?

Read the full article at MedlinePlus

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

Convert H01.9 to ICD-9-CMHistory

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

ICD-9-CM
373.9 Inflammation eyelid NOS
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About H01.9Overview

What is the ICD-10 code for unspecified inflammation of eyelid?

The ICD-10-CM code for unspecified inflammation of eyelid is H01.9 (sometimes written as H019). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H01.9 (Other inflammation of eyelid) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified inflammation of eyelid on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H01.9 group to?

When unspecified inflammation of eyelid is the principal diagnosis on an inpatient stay, it groups to MS-DRG 125, 124, with relative weights from 0.7699 to 1.2470 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H01.9?

Under the General Equivalence Mappings, unspecified inflammation of eyelid converts to ICD-9-CM 373.9 (inflammation eyelid NOS). The mapping is a direct match.