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CPT/HCPCS modifier

Modifier 24

Official description: Unrelated Evaluation and Management Service by the Same Physician During a Postoperative Period

Modifier 24 tells the payer that an evaluation and management service furnished during a surgical procedure's postoperative global period is unrelated to the original surgery. It signals that the E/M visit should be considered for separate payment rather than bundled into the global surgical package.

When to use it

Use modifier 24 when the same physician or another physician in the same group and specialty performs an E/M service during the postoperative period of a prior surgery, and that service addresses a condition unrelated to the original procedure or its recovery. The medical record must clearly document a distinct diagnosis or clinical reason unrelated to the surgery, and ideally a different or unrelated ICD-10 code should support the claim. Documentation should explain why the visit falls outside the scope of routine postoperative care, since payers frequently scrutinize this modifier. It should not be applied to visits that manage surgical complications, routine follow-up, or expected recovery care tied to the original procedure.

Examples

  • A patient recovering from a knee surgery is seen in the postoperative period for evaluation of an unrelated skin condition.
  • A physician evaluates a new, unrelated complaint (e.g., abdominal pain) in a patient still within the global period of a prior orthopedic surgery.
  • A surgeon assesses a new injury unrelated to a previous procedure during the same patient's global period.

Common mistakes

  • Appending modifier 24 to E/M visits that address complications or expected recovery from the original surgery.
  • Failing to document a clearly unrelated diagnosis or reason for the visit.
  • Using modifier 24 automatically for any visit occurring during the global period without clinical justification.
  • Omitting the differing diagnosis code, making the claim appear related to the surgical procedure.

Frequently asked

Does modifier 24 guarantee separate payment for the E/M visit?

No. It only indicates the service may be unrelated and eligible for separate consideration; payment depends on payer policy and documentation review.

Can modifier 24 be used by any provider in the same practice?

It is typically used by the same physician or another physician of the same specialty and group who performed the original surgery, when documentation supports an unrelated service.

What documentation is needed to support modifier 24?

The medical record should include a distinct diagnosis, clinical rationale, and clear evidence that the visit is unrelated to the surgical procedure or its recovery.

More free billing tools: all modifiers · NCCI checker · denial codes · Medicare fees

General CPT/HCPCS modifier reference. A modifier must be clinically appropriate, documented, and consistent with payer policy — never appended solely to obtain payment. Verify current CPT/HCPCS guidance and your payer's rules.

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