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ICD-10-CM 2027

ICD-10 code for lymphangioma

D18.1

Lymphangioma, any site

✓ Billable / specific

From the official ICD-10-CM alphabetic index entry “Lymphangioma”. Page updated September 29, 2026.

About coding lymphangioma

The ICD-10-CM code for lymphangioma is D18.1 (Lymphangioma, any site). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on D18.1.

Within D18 (Hemangioma and lymphangioma, any site), D18.1 is specifically for lymphangioma, any site. Related codes cover Hemangioma (D18.0).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 814 (Reticuloendothelial and Immunity Disorders with MCC, relative weight 2.0729), DRG 815 (Reticuloendothelial and Immunity Disorders with CC, relative weight 1.0444) and DRG 816 (Reticuloendothelial and Immunity Disorders without CC/MCC, relative weight 0.7381), in MDC 16 (Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

More specific lymphangioma codes (official index)

  • capillary D18.1 — Lymphangioma, any site
  • cavernous D18.1 — Lymphangioma, any site
  • cystic D18.1 — Lymphangioma, any site
  • malignant

Common questions about lymphangioma ICD-10 codes

What is the ICD-10 code for lymphangioma?

D18.1 — Lymphangioma, any site. More specific codes apply when the documentation supports them: D18.1, D18.1, D18.1.

What is the ICD-10 code for capillary lymphangioma?

D18.1 — Lymphangioma, any site.

What is the ICD-10 code for cavernous lymphangioma?

D18.1 — Lymphangioma, any site.

What is the ICD-10 code for cystic lymphangioma?

D18.1 — Lymphangioma, any site.

Is D18.1 billable?

Yes. D18.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can D18.1 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict D18.1 as a principal diagnosis.

Is D18.1 a CC or MCC?

No. D18.1 is neither a CC nor an MCC under MS-DRG v44.0.