Coding and coverage · ICD-10-CM
H40.20X2 Unspecified primary angle-closure glaucoma, moderate stage
7th character 2: moderate stage
Instructional notes
Chapter 7
Excludes2Not included here: the patient may have both; report both when both are present.
- 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
- Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
H40.20
7th charactersOne of the following 7th characters is to be assigned to code H40.20 to designate the stage of glaucoma
- 0 stage unspecified
- 1 mild stage
- 2 moderate stage
- 3 severe stage
- 4 indeterminate stage
Chapter 7: Diseases of the eye and adnexa · H40-H42 Glaucoma (H40-H42)
Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.
Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.