Skip to content
Dx

ICD-10-CM 2027 diagnosis code

B18.2Chronic viral hepatitis C

✓ Billable / specific

B18.2 is a valid, billable ICD-10-CM code for chronic viral hepatitis c. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Hepatitis C.

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 B18.2

B18.2 is the ICD-10-CM diagnosis code for chronic viral hepatitis C. It belongs to category B18 (chronic viral hepatitis), block B15-B19 (viral hepatitis) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within B18 (chronic viral hepatitis), B18.2 is specifically for chronic viral hepatitis C. Related codes cover B with delta-agent (B18.0), B without delta-agent (B18.1), other chronic viral hepatitis (B18.8) and unspecified (B18.9).

Use an additional code, if applicable, for ascites (R18.8).

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 441 (Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with MCC, relative weight 1.8219), DRG 442 (Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with CC, relative weight 0.9602), DRG 443 (Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis without CC/MCC, relative weight 0.6885), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 07 (Diseases and Disorders of the Hepatobiliary System and Pancreas) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), 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 070.54 (chronic hepatitis C without mention of hepatic coma).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Carrier of viral hepatitis C

Notes that apply from higher levels

Instructions written at a parent level also apply to B18.2.

› From B18 Chronic viral hepatitis
Includes
  • Carrier of viral hepatitis
Use additional code
  • code, if applicable, for ascites (R18.8)

Broader instructions also apply from B15-B19 Viral hepatitis and Chapter 1: Certain infectious and parasitic diseases.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to B18.2.

Codes whose notes reference B18.2

  • C22Use additional code

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.

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

ICD-9-CM equivalent

Converter →
  • 070.54Chronic hepatitis C without mention of hepatic comaapproximate

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 B18.2

Is B18.2 billable?

Yes. B18.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can B18.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict B18.2 as a principal diagnosis.

Is B18.2 a CC or MCC?

No. B18.2 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does B18.2 group to?

B18.2 is used in the MS-DRG v44.0 logic for MS-DRG 441 (Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with MCC), MS-DRG 442 (Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with CC), MS-DRG 443 (Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis without CC/MCC), MS-DRG 791 (Prematurity with Major Problems) and MS-DRG 793 (Full Term Neonate with Major Problems). 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 B18.2?

The CMS General Equivalence Mappings map B18.2 to ICD-9-CM 070.54.