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H18.50 ICD-10-CM Code: Unspecified hereditary corneal dystrophies

Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.

Official Registry Overview & Definition

Unspecified hereditary corneal dystrophies is a non-billable ICD-10-CM category code (H18.50). A more specific billable subcode must be selected for claims submission.

Change history

Verify Before Coding

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Contextual Map

Every relationship of H18.50 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • H00-H59 — Chapter 7: Diseases of the Eye and Adnexa (H00-H59) (H00-H59) [Hierarchy]
  • H15-H22 — Disorders of sclera, cornea, iris and ciliary body [Hierarchy]

Clinical classification (CCSR)

  • EYE001 — Cornea and external disease [CCSR]

Nearest codes (40)

  • H18 — Other disorders of cornea [Sibling]
  • H18.423 — Band keratopathy, bilateral [Sibling]
  • H18.429 — Band keratopathy, unspecified eye [Sibling]
  • H18.43 — Other calcerous corneal degeneration [Sibling]
  • H18.44 — Keratomalacia [Sibling]
  • H18.441 — Keratomalacia, right eye [Sibling]
  • H18.442 — Keratomalacia, left eye [Sibling]
  • H18.443 — Keratomalacia, bilateral [Sibling]
  • and 32 more

Change history

  • FY2021 — Became a non-billable header [Change history]

Relationships & Classification

Clinical classification (AHRQ CCSR):EYE001 — Cornea and external disease (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Frequently Asked Questions (FAQ) & Clinical Guidance

Can H18.50 be billed directly?

No. H18.50 (Unspecified hereditary corneal dystrophies) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to H18.50 in its code family, with their registry titles.

  • H18.462 — Peripheral corneal degeneration, left eye
  • H18.463 — Peripheral corneal degeneration, bilateral
  • H18.469 — Peripheral corneal degeneration, unspecified eye
  • H18.49 — Other corneal degeneration
  • H18.5 — Hereditary corneal dystrophies
  • H18.501 — Unspecified hereditary corneal dystrophies, right eye
  • H18.502 — Unspecified hereditary corneal dystrophies, left eye
  • H18.503 — Unspecified hereditary corneal dystrophies, bilateral
  • H18.509 — Unspecified hereditary corneal dystrophies, unspecified eye
  • H18.51 — Endothelial corneal dystrophy

View all codes in the H18 family