Skip to content
Dx

ICD-10-CM 2027 diagnosis code

D37.6Neoplasm of uncertain behavior of liver, gallbladder and bile ducts

✓ Billable / specific

D37.6 is a valid, billable ICD-10-CM code for neoplasm of uncertain behavior of liver, gallbladder and bile ducts. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Neoplasm of uncertain behavior of liver, GB & bile duct

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About D37.6

D37.6 is the ICD-10-CM diagnosis code for neoplasm of uncertain behavior of liver, gallbladder and bile ducts. It belongs to category D37 (neoplasm of uncertain behavior of oral cavity and digestive organs), block D37-D48 (neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes) and chapter 2 (neoplasms). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within D37 (neoplasm of uncertain behavior of oral cavity and digestive organs), D37.6 is specifically for neoplasm of uncertain behavior of liver, gallbladder and bile ducts. Related codes cover lip, oral cavity and pharynx (D37.0), stomach (D37.1), small intestine (D37.2), appendix (D37.3), colon (D37.4), rectum (D37.5), other specified digestive organs (D37.8) and digestive organ, unspecified (D37.9).

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 435 (Malignancy of Hepatobiliary System or Pancreas with MCC, relative weight 1.843), DRG 436 (Malignancy of Hepatobiliary System or Pancreas with CC, relative weight 1.1224) and DRG 437 (Malignancy of Hepatobiliary System or Pancreas without CC/MCC, relative weight 0.8081), in MDC 07 (Diseases and Disorders of the Hepatobiliary System and Pancreas), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 235.3 (neoplasm of uncertain behavior of liver and biliary passages).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Neoplasm of uncertain behavior of ampulla of Vater

Notes that apply from higher levels

Instructions written at a parent level also apply to D37.6.

› From D37 Neoplasm of uncertain behavior of oral cavity and digestive organs
Excludes1
  • stromal tumors of uncertain behavior of digestive system (D48.1-)

Broader instructions also apply from D37-D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes and Chapter 2: Neoplasms.

Table of Drugs & Neoplasms entries

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 235.3Neoplasm of uncertain behavior of liver and biliary passagesexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about D37.6

Is D37.6 billable?

Yes. D37.6 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can D37.6 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict D37.6 as a principal diagnosis.

Is D37.6 a CC or MCC?

No. D37.6 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does D37.6 group to?

D37.6 is used in the MS-DRG v44.0 logic for MS-DRG 435 (Malignancy of Hepatobiliary System or Pancreas with MCC), MS-DRG 436 (Malignancy of Hepatobiliary System or Pancreas with CC) and MS-DRG 437 (Malignancy of Hepatobiliary System or Pancreas without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for D37.6?

The CMS General Equivalence Mappings map D37.6 to ICD-9-CM 235.3.