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ICD-10-CM 2027 diagnosis code

K30Functional dyspepsia

✓ Billable / specific

K30 is a valid, billable ICD-10-CM code for functional dyspepsia. 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 Acidity, ICD-10 code for Apepsia, ICD-10 code for Indigestion.

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 K30

K30 is the ICD-10-CM diagnosis code for functional dyspepsia. It belongs to block K20-K31 (diseases of esophagus, stomach and duodenum) and chapter 11 (diseases of the digestive system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Don't report K30 together with the conditions in its Excludes1 note: dyspepsia NOS (R10.13), heartburn (R12), nervous dyspepsia (F45.8), neurotic dyspepsia (F45.8) and 1 more.

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 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), in MDC 06 (Diseases and Disorders of the Digestive System), 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 536.8 (dyspepsia and other specified disorders of function of stomach).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Indigestion
Excludes1Not coded here — never report together with this code

Notes that apply from higher levels

Instructions written at a parent level also apply to K30.

Broader instructions also apply from K20-K31 Diseases of esophagus, stomach and duodenum and Chapter 11: Diseases of the digestive system.

Alphabetic index entries

17 entries

Terms in the official ICD-10-CM index that lead to K30.

Codes whose notes reference K30

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 →
  • 536.8Dyspepsia and other specified disorders of function of stomachexact

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 K30

Is K30 billable?

Yes. K30 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can K30 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict K30 as a principal diagnosis.

Is K30 a CC or MCC?

No. K30 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does K30 group to?

K30 is used in the MS-DRG v44.0 logic for MS-DRG 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC) and MS-DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without 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 K30?

The CMS General Equivalence Mappings map K30 to ICD-9-CM 536.8.