H21.549 Posterior synechiae (iris), unspecified eye

Billable ICD-10-CM code, FY2026.

Applies from H21 Other disorders of iris and ciliary body

Excludes2 (not included here)

• sympathetic uveitis (H44.1-)

Applies from H21.5 Other and unspecified adhesions and disruptions of iris and ciliary body

Excludes1 (never code together)

• corectopia (Q13.2)

MS-DRG index

Defines the logic of DRG(s) 124-125 in MDC 02.

Approximate ICD-9-CM (GEMs)

• 364.71 Posterior synechiae of iris (approximate)

Nearby codes

• H21.539 Iridodialysis, unspecified eye
• H21.54 Posterior synechiae (iris)
• H21.541 Posterior synechiae (iris), right eye
• H21.542 Posterior synechiae (iris), left eye
• H21.543 Posterior synechiae (iris), bilateral
• H21.549 Posterior synechiae (iris), unspecified eye (this code)
• H21.55 Recession of chamber angle
• H21.551 Recession of chamber angle, right eye
• H21.552 Recession of chamber angle, left eye
• H21.553 Recession of chamber angle, bilateral
• H21.559 Recession of chamber angle, unspecified eye