Is H20.03 a billable ICD-10-CM code?

No. H20.03 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does H20.03 sit in the tabular list?

Diseases of the eye and adnexa (H00-H59), in the block Disorders of sclera, cornea, iris and ciliary body (H15-H22).

What cannot be coded together with H20.03?

H20.03 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above H20.03 (H20.0) and apply to it just the same.

H20.03

H20.03 — Secondary infectious iridocyclitis

Non-billable headerICD-10-CM

H20.03 is a non-billable header ICD-10-CM code for secondary infectious iridocyclitis. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above H20.03

These are not written on H20.03, but they bind it: a note on a category applies to every code beneath it. Billing H20.03 with anything listed here is a denial.

Written on H20.0 — Acute and subacute iridocyclitis

iridocyclitis, iritis, uveitis (due to) (in) diabetes mellitus (E08-E13 with .39)
iridocyclitis, iritis, uveitis (due to) (in) diphtheria (A36.89)
iridocyclitis, iritis, uveitis (due to) (in) gonococcal (A54.32)
iridocyclitis, iritis, uveitis (due to) (in) herpes (simplex) (B00.51)
iridocyclitis, iritis, uveitis (due to) (in) herpes zoster (B02.32)
iridocyclitis, iritis, uveitis (due to) (in) late congenital syphilis (A50.39)
iridocyclitis, iritis, uveitis (due to) (in) late syphilis (A52.71)
iridocyclitis, iritis, uveitis (due to) (in) sarcoidosis (D86.83)
iridocyclitis, iritis, uveitis (due to) (in) syphilis (A51.43)
iridocyclitis, iritis, uveitis (due to) (in) toxoplasmosis (B58.09)
iridocyclitis, iritis, uveitis (due to) (in) tuberculosis (A18.54)

Risk adjustment

H20.03 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code history

H20.03 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead H20.03

4 child codes. Green means billable.

Related codes at this level

Codes that share H20.0. If H20.03 is not quite right, the correct code is usually one of these.

Questions about H20.03

Is H20.03 a billable ICD-10-CM code?: No. H20.03 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does H20.03 sit in the tabular list?: Diseases of the eye and adnexa (H00-H59), in the block Disorders of sclera, cornea, iris and ciliary body (H15-H22).
What cannot be coded together with H20.03?: H20.03 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above H20.03 (H20.0) and apply to it just the same.