373 Inflammation of eyelids (373.00-373.9) ICD-9-CM
The 373.00-373.9 block classified 373 inflammation of eyelids with 16 legacy diagnosis codes. None remain valid for claim submission; each code below links to its reference page with the official ICD-10-CM replacement under the CMS General Equivalence Mappings.
Retired Code Set
ICD-9-CM stopped being valid for U.S. claims with dates of service on or after October 1, 2015, when ICD-10-CM replaced it. Use this index for historical lookups and crosswalking; for current coding, start from the ICD-10-CM codes list or the ICD-9 / ICD-10 converter.
Legacy Codes in the 373.00-373.9 Block 16 codes
None of these codes remain valid for claim submission. Each code page shows its ICD-10-CM replacement under the CMS General Equivalence Mappings.
- 373.00 Blepharitis NOS
- 373.01 Ulcerative blepharitis
- 373.02 Squamous blepharitis
- 373.11 Hordeolum externum
- 373.12 Hordeolum internum
- 373.13 Abscess of eyelid
- 373.2 Chalazion
- 373.31 Eczem dermatitis eyelid
- 373.32 Contact dermatit eyelid
- 373.33 Xeroderma of eyelid
- 373.34 Disc lup erythematos lid
- 373.4 Infect derm lid w deform
- 373.5 Infec dermatitis lid NEC
- 373.6 Parasitic infest eyelid
- 373.8 Inflammation eyelid NEC
- 373.9 Inflammation eyelid NOS
Questions About This Page
Are the 373.00-373.9 codes still billable?
No. Every code in this block became invalid for U.S. claims after September 30, 2015. Each code page linked above shows the ICD-10-CM replacement CMS assigned in the General Equivalence Mappings, and the ICD-9 / ICD-10 converter translates any of them directly.
What did the 373.00-373.9 block classify?
The block classified 373 inflammation of eyelids with 16 codes in the final ICD-9-CM release. It sat under Diseases of the sense organs (360–389) in the legacy hierarchy.
Related References
Source: final CMS ICD-9-CM release (version date October 1, 2014). Retired from U.S. claims after September 30, 2015.
