2027 ICD-10-CM Diagnosis Code K60.412Rectal fistula, simple, persistent

ICD-10-CM Codes›K00–K95›K55-K64›K60

ICD-10-CM K60.412
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

K60.412 is a billable ICD-10-CM diagnosis code for rectal fistula, simple, persistent. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 393 through 395. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Anal and rectal conditions.

Code Identity

ICD-10-CM Code
K60.412
Billable Status
Yes — Valid for Submission
Code Describes
Rectal fistula, simple, persistent
Short Description
Rectal fistula, simple, persistent
Same as the full description in the CMS dataset.
Parent Code
K60.41
Rectal fistula, simple

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK55-K64Other diseases of intestines
CategoryK60Fissure and fistula of anal and rectal regions
This CodeK60.412Rectal fistula, simple, persistent

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to K60.412: its own notes plus those printed at K60.4, K60, and Chapter 11. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Rectal fistula, simple, chronic

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From K60.4 Rectal fistula applies to 9 codes
  • congenital fistula (Q43.6)
  • rectovaginal fistula (N82.3)
  • vesicorectal fistual (N32.1)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From K60 Fissure and fistula of anal and rectal regions applies to 30 codes
  • abscess or cellulitis of anal and rectal regions (K61.-)
  • anal sphincter tear (healed) (nontraumatic) (old) (K62.81)
From Chapter 11 (K00-K95) Diseases of the digestive system applies to 863 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Code First

The underlying condition named in the note is sequenced before this code.

From K60.4 Rectal fistula applies to 9 codes
  • if applicable:
  • Crohn's disease (K50.-)
  • ulcerative colitis (K51.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name K60.412, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming K60.412: they are not reported together with it, unless the two conditions are unrelated.

  • K62.6 Ulcer of anus and rectum
    fissure and fistula of anus and rectum (K60.-) names K60.-, which includes this code

Excludes2 2

These codes carry an Excludes2 note naming K60.412: its condition is not part of those codes, and both may be reported when the patient has both.

  • K62.81 Anal sphincter tear (healed) (nontraumatic) (old)
    anal fissure (K60.-) names K60.-, which includes this code
  • K63.2 Fistula of intestine
    fistula of anal and rectal regions (K60.-) names K60.-, which includes this code

Use Additional Code 2

These codes say to use an additional code from the note, and K60.412 is one of the codes named.

  • K50 Crohn's disease [regional enteritis]
    rectal fistula (K60.4-) names K60.4-, which includes this code
  • K51 Ulcerative colitis
    rectal fistula (K60.4-) names K60.4-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DIG015
Anal and rectal conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Rectal Fistula

    an abnormal anatomical passage connecting the rectum to the outside, with an orifice at the site of drainage.

Patient EducationClinical

Fistulas

A fistula is an abnormal connection between two parts inside of the body. Fistulas may develop between different organs, such as between the esophagus and the windpipe or the bowel and the vagina. They can also develop between two blood vessels, such as between an artery and a vein or between two arteries.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code History & ChangesHistory

Replacement K60.412 replaces the following previously assigned code(s):

  • K60.4 - Rectal fistula
FY 2025AddedAdded to the ICD-10-CM code setEffective October 1, 2024.
FY 2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About K60.412Overview

What is the ICD-10 code for rectal fistula, simple, persistent?

The ICD-10-CM code for rectal fistula, simple, persistent is K60.412 (sometimes written as K60412). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is K60.412 (Rectal fistula, simple) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report rectal fistula, simple, persistent on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does K60.412 group to?

When rectal fistula, simple, persistent is the principal diagnosis on an inpatient stay, it groups to MS-DRG 394, 395, 393, with relative weights from 0.6379 to 1.5877 depending on complications. Higher weights mean higher Medicare reimbursement.

Can K60.412 be reported with Q43.6?

Not as a rule. The Excludes1 note at K60.4, which applies to K60.412, lists "congenital fistula (Q43.6)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is coded first with K60.412?

The Code First note at K60.4, which applies to K60.412, reads: , if applicable: Crohn's disease (K50.-); ulcerative colitis (K51.-). When one of these applies, it is sequenced before K60.412.