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D37.01 ICD-10-CM Code: Neoplasm of uncertain behavior of lip

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FY 2026 Apr update / Neoplasms (C00-D49) / Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48)

D37.01

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Neoplasm of uncertain behavior of lip

A growth on the lip with uncertain behavior, meaning it cannot be definitively classified as benign or malignant and requires further evaluation.

CMS-HCC V28

0

0

RAF 0

CMS-HCC V24

0

0

RAF 0

ACA/HHS

0

0

RAF 0

ESRD/PACE

0

0

RAF 0

RXHCC

0

0

RAF 0

Code Trumping

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Code Book Path

Official
D37Neoplasm of uncertain behavior of oral cavity and digestive organs
D37.0Neoplasm of uncertain behavior of lip, oral cavity and pharynx
D37.01Neoplasm of uncertain behavior of lip

Inclusion Terms

Official
  • Neoplasm of uncertain behavior of vermilion border of lip

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for D37.01 in this effective period.

Related Child Codes

Official
D37.02Neoplasm of uncertain behavior of tongue
D37.03Neoplasm of uncertain behavior of the major salivary glands
D37.04Neoplasm of uncertain behavior of the minor salivary glands
D37.05Neoplasm of uncertain behavior of pharynx
D37.09Neoplasm of uncertain behavior of other specified sites of the oral cavity

Includes

Official

ICD-10-CM does not list Includes notes for D37.01 in this effective period.

Excludes 1

Official
  • neoplasm of uncertain behavior of aryepiglottic fold or interarytenoid fold, laryngeal aspect (D38.0)
  • neoplasm of uncertain behavior of epiglottis NOS (D38.0)
  • neoplasm of uncertain behavior of skin of lip (D48.5)
  • neoplasm of uncertain behavior of suprahyoid portion of epiglottis (D38.0)

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for D37.01 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for D37.01 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for D37.01 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance
This code indicates uncertain behavior; ensure pathology results or clinical documentation support this classification rather than a definitive benign or malignant diagnosis
Distinguish between D37.01 (lip) and other oral cavity sites coded under D37.09

Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.

Is D37.01 an HCC code?

No. D37.01 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.

Coder workflow notes

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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

D37.01 is the ICD-10-CM diagnosis code for neoplasm of uncertain behavior of lip. A growth on the lip with uncertain behavior, meaning it cannot be definitively classified as benign or malignant and requires further evaluation. D37.01 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (d37-d48).

D37.01 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

This code indicates uncertain behavior; ensure pathology results or clinical documentation support this classification rather than a definitive benign or malignant diagnosis.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for D37.01 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

  • This code indicates uncertain behavior; ensure pathology results or clinical documentation support this classification rather than a definitive benign or malignant diagnosis
  • Distinguish between D37.01 (lip) and other oral cavity sites coded under D37.09

Child Codes

Code Hierarchy

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