Perianal Abscess ICD-10-CM Codes

Explore ICD-10-CM codes for perianal abscess in 2023. Learn about common codes, billable statuses, and gain clinical insights in this comprehensive guide.

By Karina Jimenea on Aug 8, 2025.

Fact Checked by Ericka Pingol.

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What ICD-10 Codes are Used for Perianal Abscess

A perianal abscess is a localized collection of pus near the anal opening, often caused by infection. Here are commonly used ICD-10-CM codes for perianal abscess, along with brief clinical descriptions:

K61.0 - Anal abscess: Used when a perianal abscess is diagnosed, typically due to an infection in the anal region.
K61.1 - Ischiorectal abscess: Applied when an abscess forms in the ischiorectal fossa near the anal canal and rectum.
K61.2 - Recess of the rectum abscess: Utilized for abscesses that form in the recesses or folds of the rectal lining.
K61.3 - Pilonidal abscess: A small pocket or tunnel near the tailbone is used when an abscess develops in the pilonidal sinus.
K61.4 - Supralevator abscess: Applied when an abscess forms above the levator ani muscle located in the pelvis.
K61.8 - Other specified abscess of anal and rectal regions: Utilized for abscesses that occur in specific but not otherwise classified areas of the anal and rectal regions.
K61.9 - Abscess of anal and rectal regions, unspecified: Used when the exact location of the abscess within the anal and rectal regions is not further specified.

Which Perianal Abscess ICD Codes are Billable

The billable status of the mentioned ICD-10 codes for perianal abscess varies:

K61.0 - Anal abscess: Yes, billable. Medical expenses for anal abscesses can be claimed.
K61.1 - Ischiorectal abscess: Yes, billable. Costs associated with ischiorectal abscess can be reimbursed.
K61.2 - Recess of the rectum abscess: Yes, billable. Medical expenses for abscesses in the recesses of the rectal lining can be claimed.
K61.3 - Pilonidal abscess: Yes, billable. Expenses for pilonidal abscess can be claimed.
K61.4 - Supralevator abscess: Yes, billable. Medical expenses for supra levator abscess can be claimed.
K61.8 - Other specified abscess of anal and rectal regions: Yes, billable. Costs associated with other specified abscesses in the anal and rectal regions can be reimbursed.
K61.9 - Abscess of anal and rectal regions, unspecified: Yes, billable. Medical expenses for abscesses in unspecified locations within the anal and rectal regions can be claimed.

Clinical Information

"Malignant (primary) neoplasm, unspecified" refers to a cancer diagnosis where the exact site or type of the primary cancer is not specified.
Diagnosis involves clinical evaluation, imaging (e.g., CT, MRI, or X-rays), and biopsies to identify the primary site and cancer type.
Treatment strategies depend on the identified cancer type, its stage, and the extent of spread in the body.
Treatment often includes surgery, radiation therapy, chemotherapy, immunotherapy, targeted therapy, or precision medicine.
Patient education should focus on understanding the cancer diagnosis, treatment options, potential side effects, and the importance of regular follow-up care.
Regular monitoring is essential to assess treatment response, manage side effects, and detect recurrence.
Multidisciplinary care involving oncologists, surgeons, radiologists, and other specialists is often necessary for comprehensive cancer management.
Supportive care, psychological counseling, and resources for patients and their families are essential to cancer care, especially when dealing with unspecified primary cancers.

Synonyms Include:

Anal Abscess
Ischiorectal Abscess
Perianal Abscess ICD-10
Pilonidal Sinus Abscess
Rectal Abscess
Abscess Near Anus

Commonly asked questions

Perianal abscesses are typically caused by an infection in the small anal glands. Bacteria can enter these glands, leading to inflammation, pus formation, and abscess development.

Treatment involves draining the abscess through a small incision to relieve pain and remove the pus. Antibiotics may be prescribed if there is an associated infection.

Yes, perianal abscesses can recur. Recurrence may be prevented by addressing underlying conditions, such as anal fistulas or other factors contributing to infection. Proper hygiene and follow-up care are essential.

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