K60.321 – Anal fistula, complex, initial

ICD-10-CM 2027 diagnosis code · Other diseases of intestines

Billable code

ICD-10-CM code K60.321

Code: K60.321 (claims format: K60321)
Description: Anal fistula, complex, initial
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 11. Diseases of the digestive system (K00-K95)
Block: K55-K64 Other diseases of intestines
Parent codes: K60 › K60.3 › K60.32

Notes for K60.321

Applicable to:

Anal fistula, complex, new

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

K60 – Fissure and fistula of anal and rectal regions

Excludes2 (not included here):

abscess or cellulitis of anal and rectal regions (K61.-)
anal sphincter tear (healed) (nontraumatic) (old) (K62.81)

K60.3 – Anal fistula

Excludes1 (not coded here):

congenital fistula (Q43.6)

Code first:

, if applicable:
Crohn's disease (K50.-)
ulcerative colitis (K51.-)

K60.32 – Anal fistula, complex

Applicable to:

Extrasphincteric anal fistula
High intersphincteric anal fistula
Suprasphincteric anal fistula
Transsphincteric anal fistula

Code also:

, if applicable:
perianal abscess (K61.0)
rectovaginal fistula (N82.3)
stenosis of anus and rectum (K62.4)

Index terms for K60.321

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in K60.32

K60.322 – Anal fistula, complex, persistentBillable
K60.323 – Anal fistula, complex, recurrentBillable
K60.329 – Anal fistula, complex, unspecifiedBillable

Frequently asked questions

What is ICD-10 code K60.321?

K60.321 is the ICD-10-CM code for anal fistula, complex, initial, in the block K55-K64 (Other diseases of intestines).

Is K60.321 a billable code?

Yes. K60.321 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does K60.321 belong to?

It belongs to category K60 – Fissure and fistula of anal and rectal regions.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.