ICD-10-CM M25.18 is the diagnosis code for Fistula, other specified site. This code falls under the section "Other joint disorders" within Chapter 13 — Diseases of the musculoskeletal system and connective tissue (M00-M99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where M25.18 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, M25.18 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
M25.18 is the ICD-10-CM diagnosis code for "Fistula, other specified site". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of M25.18 is M25.1 ("Fistula of joint"). M25.18 provides a more specific classification within this category.
M25.18 is located in Section M20-M25 — "Other joint disorders" within Chapter 13 of the ICD-10-CM Tabular List.
Use M25.18 when the patients documented diagnosis matches "Fistula, other specified site" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Fistula, other specified site is M25.18.
Yes, M25.18 can be used as a primary diagnosis code since it is billable and specific.
M25.18 is in Chapter 13 of the ICD-10-CM Tabular List.
Yes, M25.18 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.