Skip to content
Dx

ICD-10-CM 2027 diagnosis code

R74.02Elevation of levels of lactic acid dehydrogenase [LDH]

✓ Billable / specific

R74.02 is a valid, billable ICD-10-CM code for elevation of levels of lactic acid dehydrogenase [ldh]. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2021 (effective October 1, 2020). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R74.02

R74.02 is the ICD-10-CM diagnosis code for elevation of levels of lactic acid dehydrogenase [LDH]. It belongs to category R74 (abnormal serum enzyme levels), block R70-R79 (abnormal findings on examination of blood, without diagnosis) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within R74.0 (nonspecific elevation of levels of transaminase and lactic acid dehydrogenase [LDH]), R74.02 is specifically for elevation of levels of lactic acid dehydrogenase [LDH]. Related codes cover liver transaminase levels (R74.01).

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 947 (Signs and Symptoms with MCC, relative weight 1.261) and DRG 948 (Signs and Symptoms without MCC, relative weight 0.7835), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), 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 was added in FY2021, effective October 1, 2020.

Notes that apply from higher levels

Instructions written at a parent level also apply to R74.02.

Broader instructions also apply from R70-R79 Abnormal findings on examination of blood, without diagnosis and Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to R74.02.

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 23 · Factors Influencing Health Status and Other Contacts with Health Services

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
  • FY2021 (effective 10/1/2020): Added
  • No changes since FY2021.

Common questions about R74.02

Is R74.02 billable?

Yes. R74.02 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can R74.02 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict R74.02 as a principal diagnosis.

Is R74.02 a CC or MCC?

No. R74.02 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does R74.02 group to?

R74.02 is used in the MS-DRG v44.0 logic for MS-DRG 947 (Signs and Symptoms with MCC) and MS-DRG 948 (Signs and Symptoms without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.