CPT Codes for Toe Amputation: 2025 Guidelines & Updates

Key Takeaways: 2025 Toe Amputation Coding

• Global Periods: CPT 28820 and 28825 have a 0-day global period. Medically necessary post-op visits are billable.
• Ray Amputation: CPT 28810 retains a 90-day global period; routine post-op care is bundled.
• Modifiers: Medicare mandates HCPCS T-modifiers (TA–T9) to identify specific toes.
• Fee Schedule: The 2025 Medicare conversion factor decreased by ~2.83%, slightly reducing global reimbursement for these codes.

Toe amputation is the surgical removal of part or all of a toe, typically performed for conditions like gangrene, osteomyelitis, or severe trauma. Accurate coding requires distinguishing between amputation levels (interphalangeal vs. metatarsophalangeal) and navigating the complex global period rules that vary by code.

This comprehensive guide covers the 2025 CPT codes, Medicare T-modifier requirements, and NCCI bundling edits, and provides five real-world coding scenarios to clarify proper billing.

1. 2025 CPT Codes for Toe Amputation

The AMA CPT code set differentiates toe amputations by the anatomical level of bone removal. There are no new codes for 2025, but correct level selection is critical.

2. Global Surgical Periods (0-Day vs 90-Day)

Understanding the global period is critical for billing postoperative care.

Critical Update: Since 2021, Medicare assigned a 0-day global period to CPT 28820 and 28825. This means routine postoperative visits (e.g., wound checks) performed after the day of surgery are separately billable.

• CPT 28820 & 28825 (0-Day): Only care on the day of surgery is bundled. Medically necessary follow-up visits are billable. Note: Routine suture removal by the same surgeon is generally still considered a non-billable service.
• CPT 28810 & 28805 (90-Day): These are major surgeries. All routine care for 90 days is bundled. Do not bill post-op visits unless for an unrelated problem (Modifier 24) or a return to the OR (Modifier 78).

flowchart TD
    A[Toe Amputation Performed] --> B{Which CPT Code?}
    B -->|28820 / 28825| C[0-Day Global Period]
    B -->|28810 / 28805| D[90-Day Global Period]
    C --> E[Only day-of-surgery care bundled]
    E --> F[Follow-up visits separately billable]
    D --> G[All routine post-op care bundled for 90 days]
    G --> H{Post-op visit needed?}
    H -->|Unrelated problem| I[Use Modifier 24]
    H -->|Return to OR for complication| J[Use Modifier 78]
    H -->|Routine post-op| K[Not separately billable]

3. Essential Modifiers (T-Modifiers, 59, 25)

Medicare and many commercial payers require specific modifiers to identify the anatomical site.

HCPCS T-Modifiers (Mandatory for Medicare)

You must append the correct T-modifier to the CPT code to indicate which toe was amputated.

Other Common Modifiers

• 50 (Bilateral): Used if the same procedure is performed on both feet (e.g., great toe amputation on left and right). Check payer preference; Medicare often prefers two separate lines with T-modifiers.
• 59 (Distinct Service): Used to unbundle distinct procedures (e.g., amputation of one toe and debridement of a separate site). Medicare prefers X-modifiers (XE, XS, XU).
• 25 (Significant E/M): Use on an E/M code if a significant, separately identifiable evaluation was performed on the same day as a minor procedure (28820/28825).

4. Advanced Modifiers (58, 78, 79)

These modifiers are critical for billing during the 90-day global period of major amputations (28810/28805).

• Modifier 58 (Staged/Related): Use if a second procedure was planned prospectively (e.g., a guillotine amputation followed by a planned closure 5 days later). Resets the global period.
• Modifier 78 (Unplanned Return to OR): Use if a patient requires a return to the operating room for a complication (e.g., infection, stump revision) related to the original surgery. Does not reset the global period.
• Modifier 79 (Unrelated Procedure): Use if an entirely unrelated procedure is performed during the global period (e.g., carpal tunnel surgery performed 30 days after a foot amputation).
• Modifier 24 (Unrelated E/M): Use on an E/M code for a visit during the global period that is unrelated to the surgery (e.g., treating hypertension).

5. Documentation Requirements

To support medical necessity and correct coding, the operative report must detail:

• Laterality & Digit: Specific toe(s) involved (e.g., "Right 2nd toe").
• Level of Amputation: Precise anatomical location (e.g., "Disarticulated at the MTP joint" vs. "Resected through the metatarsal shaft").
• Medical Necessity: Document failed conservative treatments, vascular status, or presence of gangrene/osteomyelitis.
• Bone Removal: Explicitly state if the metatarsal head was removed to support code 28810.

6. Real-World Coding Scenarios

Scenario 1: Complete Great Toe Amputation

A diabetic patient has dry gangrene of the entire left great toe. The surgeon disarticulates the toe at the metatarsophalangeal (MTP) joint.

Coding: 28820-TA Diagnosis: E11.52 (Type 2 Diabetes with peripheral angiopathy), I96 (Gangrene). Note: 0-day global; follow-up visits are billable.

Scenario 2: Partial Toe Amputation

A patient has osteomyelitis of the distal phalanx of the right 2nd toe. The surgeon removes the distal phalanx at the IP joint.

Coding: 28825-T6 Diagnosis: M86.671 (Osteomyelitis, right foot/toe). Note: 0-day global.

Scenario 3: Ray Amputation

A patient has a deep ulcer with osteomyelitis of the 5th metatarsal head on the left foot. The surgeon removes the 5th toe and the 5th metatarsal.

Coding: 28810-T4 Diagnosis: L97.514 (Ulcer of other part of foot), M86.372 (Osteomyelitis). Note: 90-day global. Routine post-op care included.

Scenario 4: Multiple Toes, Same Session

Patient requires amputation of the right 2nd and 3rd toes at the MTP joint due to ischemia.

Coding: Line 1: 28820-T6 (100% payment) Line 2: 28820-T7 (50% payment, multiple procedure reduction)

Note: Do not use modifier 59 unless NCCI edits require it (rare for same procedure on different toes with T-modifiers).

Scenario 5: Transmetatarsal Amputation (TMA)

Patient has gangrene of all toes on the left foot. Surgeon performs a transmetatarsal amputation.

Coding: 28805-LT Note: 90-day global. No T-modifiers needed as it involves the whole forefoot.

7. 2025 Fee Schedule & Policy Updates

• Conversion Factor Decrease: The 2025 Medicare Physician Fee Schedule Final Rule finalized a conversion factor of roughly $32.35, a decrease of approximately 2.83% from 2024. This slightly lowers the allowable for all toe amputation codes.
• NCCI Bundling: NCCI Chapter 4 continues to bundle metatarsal resection (28122) with toe amputation (28810/28820) on the same ray. Do not unbundle these.
• MUEs: Medically Unlikely Edits typically limit these codes to 5 units per date of service (one per toe).

8. Frequently Asked Questions (FAQ)

Can I bill for follow-up visits after a toe amputation (28820)?

Yes, for Medicare and payers following Medicare guidelines. CPT 28820 has a 0-day global period, so medically necessary office visits after the day of surgery are separately billable.

What is the difference between 28820 and 28810?

CPT 28820 is amputation of the toe at the MTP joint (toe only). CPT 28810 (Ray amputation) removes the toe plus part or all of the metatarsal bone. 28810 has a higher reimbursement and a 90-day global period.

Do I need a modifier if I amputate two different toes?

Yes. Use the appropriate T-modifiers (e.g., T6 and T7) to indicate separate anatomical sites. Medicare will pay 100% for the first and 50% for the second (multiple procedure reduction).