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ICD-10-CM 2027 diagnosis code

K64.3Fourth degree hemorrhoids

✓ Billable / specific

K64.3 is a valid, billable ICD-10-CM code for fourth degree hemorrhoids. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 K64.3

K64.3 is the ICD-10-CM diagnosis code for fourth degree hemorrhoids. It belongs to category K64 (hemorrhoids and perianal venous thrombosis), block K55-K64 (other diseases of intestines) 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.

Within K64 (hemorrhoids and perianal venous thrombosis), K64.3 is specifically for fourth degree hemorrhoids. Related codes cover first degree hemorrhoids (K64.0), second degree hemorrhoids (K64.1), third degree hemorrhoids (K64.2), residual hemorrhoidal skin tags (K64.4), perianal venous thrombosis (K64.5), other hemorrhoids (K64.8) and unspecified hemorrhoids (K64.9).

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 393 (Other Digestive System Diagnoses with MCC, relative weight 1.5881), DRG 394 (Other Digestive System Diagnoses with CC, relative weight 0.9228) and DRG 395 (Other Digestive System Diagnoses without CC/MCC, relative weight 0.6382), 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 455.0 (internal hemorrhoids without mention of complication), 455.1 (internal thrombosed hemorrhoids), 455.2 (internal hemorrhoids with other complication) and 4 more.

Coding notes

Applicable toConditions and synonyms classified to this code
  • Grade/stage IV hemorrhoids
  • Hemorrhoids (bleeding) with prolapsed tissue that cannot be manually replaced

Notes that apply from higher levels

Instructions written at a parent level also apply to K64.3.

› From K64 Hemorrhoids and perianal venous thrombosis
Includes
  • piles
Excludes1
  • hemorrhoids complicating childbirth and the puerperium (O87.2)
  • hemorrhoids complicating pregnancy (O22.4)

Broader instructions also apply from Chapter 11: Diseases of the digestive system.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to K64.3.

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 →
  • 455.0Internal hemorrhoids without mention of complicationapproximate
  • 455.1Internal thrombosed hemorrhoidsapproximate
  • 455.2Internal hemorrhoids with other complicationapproximate
  • 455.5External hemorrhoids with other complicationapproximate
  • 455.6Unspecified hemorrhoids without mention of complicationapproximate
  • 455.7Unspecified thrombosed hemorrhoidsapproximate
  • 455.8Unspecified hemorrhoids with other complicationapproximate

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 K64.3

Is K64.3 billable?

Yes. K64.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can K64.3 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict K64.3 as a principal diagnosis.

Is K64.3 a CC or MCC?

No. K64.3 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does K64.3 group to?

K64.3 is used in the MS-DRG v44.0 logic for MS-DRG 393 (Other Digestive System Diagnoses with MCC), MS-DRG 394 (Other Digestive System Diagnoses with CC) and MS-DRG 395 (Other Digestive System Diagnoses 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 K64.3?

The CMS General Equivalence Mappings map K64.3 to ICD-9-CM 455.0, 455.1, 455.2, 455.5 and 3 more.