Modifier 55 is used when a physician provides only the postoperative management for a patient following surgery, while another physician performed the surgical procedure. It is part of the global surgical package split-care modifiers and is commonly reported when postoperative care is transferred from the operating surgeon to another qualified healthcare provider.

This modifier is frequently seen in orthopedic surgery, neurosurgery, cardiovascular surgery, ophthalmology, trauma surgery, and rural healthcare settings where patients travel long distances for surgery and return home for follow-up care.

Understanding Modifier 55 is essential because improper billing can lead to denials, duplicate payments, overpayments, or audit findings. Medical billers, coders, and AR callers should know how Modifier 55 works with Modifiers 54 (Surgical Care Only) and 56 (Preoperative Management Only) under Medicare and commercial insurance policies.

Modifier Number

Modifier Name

Postoperative Management Only

Note: The official CPT® descriptor is maintained by the American Medical Association (AMA). Always refer to the latest licensed CPT® codebook for the official wording.

Plain English Explanation

Modifier 55 tells the payer:

“Another physician performed the surgery. I am responsible only for the postoperative care during the global period.”

The physician reporting Modifier 55 did not perform the operation but is responsible for routine postoperative follow-up services after an official transfer of care.

Purpose of Modifier 55

Modifier 55 is used to:

Report postoperative care only.
Identify split global surgical care.
Prevent duplicate billing.
Support appropriate reimbursement for postoperative services.
Comply with Medicare and payer-specific global surgery rules.

Understanding the Global Surgical Package

Many surgical CPT® codes include a global surgical package, which generally consists of:

Preoperative care related to the surgery.
The surgical procedure itself.
Routine postoperative care during the global period.

Normally, one physician provides all three components. However, when patient care is divided among providers, the global package may be split using Modifiers 54, 55, and 56.

Modifier	Responsibility
54	Surgical Care Only
55	Postoperative Management Only
56	Preoperative Management Only

When to Use Modifier 55

Modifier 55 is appropriate when:

The operating surgeon transfers postoperative care to another physician.
The transfer of care is documented.
The receiving physician manages routine postoperative visits during the global period.
The payer recognizes split global billing.
The surgical procedure has a global period.

Common Examples

✔ Orthopedic surgeon performs knee replacement in another city; hometown orthopedic physician provides postoperative care.

✔ Neurosurgeon performs spinal surgery; local physician manages follow-up visits.

✔ Ophthalmologist performs surgery at a specialty center; referring ophthalmologist provides postoperative management.

✔ Trauma surgeon repairs fractures; postoperative care is transferred to a community orthopedic physician.

When NOT to Use Modifier 55

Do not use Modifier 55 when:

The physician also performed the surgery.
No transfer of postoperative care occurred.
The postoperative visits are unrelated to the surgery.
The procedure has no global period.
Documentation does not support postoperative management responsibilities.

Medicare Rules

Medicare allows physicians to bill Modifier 55 when postoperative care is transferred appropriately.

Important Medicare guidelines include:

Modifier 55 is appended to the same surgical CPT® code billed by the operating surgeon.
The physician should report the date postoperative care began.
The transfer of care should be documented by both providers whenever applicable.
Medicare reimburses only the postoperative portion of the global surgical package.
The operating surgeon typically reports Modifier 54.

Always follow current CMS guidance and Medicare Administrative Contractor (MAC) policies.

Commercial Insurance Rules

Commercial payer requirements vary.

Some insurers:

Accept Modifier 55.
Require written transfer-of-care documentation.
Require notification from both providers.
Apply different reimbursement methodologies.
Have payer-specific global surgery policies.

Always verify payer requirements before claim submission.

Documentation Requirements

Documentation should include:

Date postoperative care began.
Date of transfer of care.
Name of operating surgeon.
Surgical procedure performed.
Routine postoperative visit documentation.
Communication between providers.
Medical necessity.
Physician signature.

Proper documentation is critical to support reimbursement.

Real Billing Examples

Example 1 – Total Knee Replacement

A patient travels to another state for total knee replacement surgery.

The orthopedic surgeon performs the surgery.

Postoperative management is transferred to the patient’s hometown orthopedic physician.

The hometown physician reports:

27447-55

for postoperative management only, following payer-specific billing requirements.

Example 2 – Cataract Surgery

An ophthalmologist performs cataract surgery at a specialty center.

Routine postoperative visits are transferred to the patient’s local ophthalmologist.

The local ophthalmologist appropriately reports Modifier 55 if payer policy allows.

Example 3 – Incorrect Use

A surgeon performs a laparoscopic appendectomy and personally completes all postoperative visits.

Modifier 55 should not be reported because postoperative care was not transferred.

CMS-1500 Claim Example

Field	Example
CPT Code	Surgical CPT® code
Modifier	55
Diagnosis Pointer	Appropriate ICD-10-CM diagnosis
Units	1
Charges	Provider’s billed amount

Common Denial Reasons

No documented transfer of care.
Physician performed both surgery and postoperative management.
Missing postoperative management dates.
Procedure has no global period.
Duplicate billing with the operating surgeon.
Payer does not recognize split global billing.

How to Correct the Denial

Review the EOB or ERA.
Verify the transfer-of-care date.
Confirm the physician only provided postoperative care.
Submit documentation supporting postoperative management.
Include communication between providers if requested.
Appeal with complete documentation when appropriate.

Coding Tips

Use Modifier 55 only when another physician performed the surgery.
Verify that the surgery has an applicable global period.
Maintain clear transfer-of-care documentation.
Confirm payer recognition of split global care.
Record the exact postoperative management start date.

Modifier 55 vs Modifier 54 vs Modifier 56

Modifier	Description
54	Surgical Care Only
55	Postoperative Management Only
56	Preoperative Management Only

These modifiers divide responsibility for the global surgical package among different physicians.

Frequently Asked Questions (FAQs)

Q1. Can the operating surgeon report Modifier 55?

Answer: No. Modifier 55 is reported by the physician who provides postoperative care after an official transfer of care.

Q2. Does Modifier 55 affect reimbursement?

Answer: Yes. The physician receives reimbursement only for the postoperative portion of the global surgical package according to Medicare or payer policies.

Q3. Is documentation required?

Answer: Yes. Documentation supporting the transfer of care and postoperative management is essential.

Q4. Can Modifier 55 be used with commercial insurance?

Answer: Yes, when the payer recognizes split global billing and all policy requirements are met.

AR Caller Tips

When following up on a denied Modifier 55 claim:

Verify the payer accepts Modifier 55.
Confirm the surgery was performed by another physician.
Check the documented transfer-of-care date.
Ensure the operating surgeon billed Modifier 54, if applicable.
Submit postoperative notes and transfer documentation if requested.
Record the payer representative’s name, reference number, and instructions.

Interview Questions

Question 1

What is Modifier 55 used for?

Answer: Modifier 55 reports postoperative management only when another physician performed the surgery.

Question 2

Who reports Modifier 54?

Answer: The physician who performed the surgical procedure but did not provide postoperative care.

Question 3

Why is transfer-of-care documentation important?

Answer: It demonstrates that postoperative responsibility was officially transferred, supporting appropriate reimbursement and preventing duplicate billing.

Practice Scenario

Scenario

A patient undergoes lumbar spine surgery at a tertiary care hospital. After discharge, the neurosurgeon transfers routine postoperative management to the patient’s hometown orthopedic surgeon for the remainder of the 90-day global period.

Question

Should Modifier 55 be considered?

Answer

Yes. The hometown orthopedic surgeon may report Modifier 55 because they are responsible only for postoperative management following an official transfer of care, subject to Medicare or payer-specific billing requirements.

Related Modifiers

Modifier 54 – Surgical Care Only.
Modifier 56 – Preoperative Management Only.
Modifier 57 – Decision for Surgery.
Modifier 58 – Staged or Related Procedure During the Postoperative Period.
Modifier 78 – Unplanned Return to the Operating Room.
Modifier 79 – Unrelated Procedure During the Postoperative Period.

Common Billing Mistakes

Billing Modifier 55 when the physician performed the surgery.
Missing transfer-of-care documentation.
Billing postoperative care outside the global period.
Reporting Modifier 55 on procedures without a global period.
Failing to verify payer-specific split global rules.

Key Takeaways

Modifier 55 is used for postoperative management only.
Another physician must have performed the surgery.
Transfer-of-care documentation is essential.
Medicare and commercial payers may have different reimbursement policies.
Proper use helps prevent duplicate billing and supports accurate reimbursement.

References

CMS Medicare Claims Processing Manual.
CMS Global Surgery Booklet.
Medicare Administrative Contractor (MAC) billing guidance.
National Correct Coding Initiative (NCCI) Policy Manual.
Licensed AMA CPT® codebook for official modifier descriptors.

Conclusion

Modifier 55 plays a critical role in reporting postoperative management when surgical care is shared between physicians. Proper use requires an official transfer of care, complete documentation, and adherence to Medicare and payer-specific global surgery rules. Understanding how Modifier 55 works with Modifiers 54 and 56 helps medical billers, coders, and AR callers submit compliant claims, reduce denials, and ensure appropriate reimbursement.

Educational Disclaimer

This article was prepared with the assistance of artificial intelligence (AI) for educational and informational purposes. It is based on publicly available CMS guidance, Medicare billing resources, and general medical billing practices. It is not an official publication of the American Medical Association (AMA), CMS, or any insurance payer. CPT® is a registered trademark of the American Medical Association. Always consult the latest AMA CPT® codebook, CMS manuals, Medicare Administrative Contractor (MAC) guidance, National Correct Coding Initiative (NCCI) policies, and payer-specific billing policies before coding, billing, or submitting claims.