H00

Non-Billable
ChapterH00–H59
Rankcategory
Official Description

Hordeolum and chalazion

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 7: Diseases of the Eye and Adnexa (H00-H59).

CH7 Parent Instructions

Excludes2(Not included here)
  • 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)

H00-H05 Parent Instructions

Excludes2(Not included here)

Clinical Hierarchy

CH7Diseases of the eye and adnexa (H00-H59)
H00-H05Disorders of eyelid, lacrimal system and orbit (H00-H05)
H00Hordeolum and chalazion
H00.0Hordeolum (externum) (internum) of eyelid
H00.1Chalazion

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to H00:

blockH00-H05
Disorders of eyelid, lacrimal system and orbit (H00-H05)
View context instructions
chapterCH7
Diseases of the eye and adnexa (H00-H59)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to H00. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

22 raw paths
Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)1 unique routes
eyelid→H00
Chalazion7 unique routes
Direct index entry→H00
left→H00(3 variants)
lower→H00
upper→H00
right→H00(3 variants)
lower→H00
upper→H00
Hordeolum (eyelid) (externum) (recurrent)14 unique routes
Direct index entry→H00
internum→H00(7 variants)
left→H00(3 variants)
lower→H00
upper→H00
right→H00(3 variants)
lower→H00
upper→H00
left→H00(3 variants)
lower→H00
upper→H00
right→H00(3 variants)
lower→H00
upper→H00

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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