ICD-10 Code I97.631 – Postprocedural hematoma of a circulatory system organ or structure following cardiac bypass (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I97.631 – Postprocedural hematoma of a circulatory system organ or structure following cardiac bypass
What it is
This code identifies a hematoma that develops in a circulatory system organ or structure after cardiac bypass surgery. Use it when the postoperative bleeding collection is documented as a complication of the bypass procedure.
Clinical signs
Typical findings include localized swelling, pain, bruising, or evidence of blood collection at the surgical site. Clinical features vary; refer to documentation.
When to use this code
Use I97.631 when the provider documents a postprocedural hematoma specifically following cardiac bypass. It applies to complications tied to the operation, not to routine postoperative discomfort or expected bruising. If the record does not clearly link the hematoma to the bypass, check documentation.
Do not use for
Do not use this code for hematomas unrelated to surgery or for bleeding complications after other procedures. If the note does not specify cardiac bypass as the cause, do not assume this code.
Coding tip
Verify both the postoperative complication and the cardiac bypass relationship in the operative or progress note before assigning I97.631.