Skip to main content

H18.55 ICD-10-CM Code: Macular corneal dystrophy

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

Official Registry Overview & Definition

Macular corneal dystrophy is a non-billable ICD-10-CM category code (H18.55). 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 H18.55 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]
  • H18.51 — Endothelial corneal dystrophy [Sibling]
  • H18.511 — Endothelial corneal dystrophy, right eye [Sibling]
  • H18.512 — Endothelial corneal dystrophy, left eye [Sibling]
  • H18.513 — Endothelial corneal dystrophy, bilateral [Sibling]
  • H18.519 — Endothelial corneal dystrophy, unspecified eye [Sibling]
  • H18.52 — Epithelial (juvenile) corneal dystrophy [Sibling]
  • H18.521 — Epithelial (juvenile) corneal dystrophy, right eye [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 H18.55 be billed directly?

No. H18.55 (Macular corneal dystrophy) 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 H18.55 in its code family, with their registry titles.

  • H18.54 — Lattice corneal dystrophy
  • H18.541 — Lattice corneal dystrophy, right eye
  • H18.542 — Lattice corneal dystrophy, left eye
  • H18.543 — Lattice corneal dystrophy, bilateral
  • H18.549 — Lattice corneal dystrophy, unspecified eye
  • H18.551 — Macular corneal dystrophy, right eye
  • H18.552 — Macular corneal dystrophy, left eye
  • H18.553 — Macular corneal dystrophy, bilateral
  • H18.559 — Macular corneal dystrophy, unspecified eye
  • H18.59 — Other hereditary corneal dystrophies

View all codes in the H18 family