CPT code 20220 – Bone biopsy, trocar or needle, superficial

Key takeaways

CPT code 20220 covers a trocar or needle biopsy of superficial bone, such as the ilium, sternum, spinous process or ribs. Open biopsy and marrow aspiration alone use other codes.

Anatomical depth decides the code: superficial sites use 20220, while deep sites such as the vertebral body or femur use CPT 20225.

Imaging guidance (77002, 77012, 76942) may be separately reportable with CPT code 20220. It needs its own documentation, and a modifier only where the current NCCI edit allows one.

For CY2026, 20220 carries 6.68 non-facility RVUs, about $223 nationally at the non-QP conversion factor, and a 000-day global period.

Pabau, the practice management platform we build, pulls existing record data into a pre-filled claim and submits and tracks it through Claim.MD.

CPT code 20220: official descriptor and clinical overview

CPT code 20220 is defined by the American Medical Association as: Biopsy, bone, trocar, or needle; superficial (e.g., ilium, sternum, spinous process, ribs). The code sits in the Musculoskeletal System section of CPT, in the Excision range of the General subsection (20150-20251).

Three elements decide whether 20220 applies to a visit:

• Technique: trocar or percutaneous needle. Open surgical excision is not part of this code.
• Target: bone tissue, not soft tissue or marrow aspiration alone.
• Depth: superficial bone as named in the descriptor examples (ilium, sternum, spinous process, ribs). Depth is a clinical call recorded in the operative report. A coder should not guess it.

The examples in the descriptor are only a guide, not a full list. So, for a site the descriptor does not name, the operative note must name the bone and the approach. That way, a reviewer can check the depth call.

What procedures does CPT 20220 cover and what does it exclude?

CPT 20220 captures one specific mix of technique and target. Therefore, knowing what falls outside the code helps you avoid under- and over-coding.

CPT 20220 vs CPT 20225: how to choose the right code

The distinction between 20220 and 20225 is anatomical depth confirmed in the operative report. A coder cannot make this call from the procedure name alone. Instead, the operative note must record the site reached and the approach used.

The upcoding risk to flag in audits: a note describing “deep needle insertion” at a rib or iliac crest does not make 20225 correct. In fact, “deep” in everyday surgical talk often means the needle passed through soft tissue to reach bone. It does not mean the bone itself is deep. Thus, the bone location sets the depth, not how far the needle traveled. The diagram below maps each technique and site to its code.

How to document CPT code 20220 for clean claim submission

A complete operative note for CPT code 20220 must show medical need and confirm the elements that support the code. For this reason, payers check these elements on pre-payment review and on post-payment audits. Pabau’s claims management software pulls existing record data into a pre-filled claim and submits and tracks it through Claim.MD. Even so, the note itself still has to carry the elements below.

To send a clean claim for 20220, the operative note must include all of the following:

1. Anatomical site: Name the specific bone (e.g., “left iliac crest,” “sternum at the angle of Louis”). Vague phrases like “bone” or “bony structure” are not enough.
2. Technique: State that a trocar or percutaneous needle was used. Note gauge and type if the payer’s LCD requires it.
3. Depth language: Name the superficial site and the approach used. Also avoid the bare word “deep” when you describe superficial sites.
4. Laterality: Document left, right, or bilateral. This matters for modifier choice and payer processing.
5. Clinical indication: Tie the biopsy directly to a diagnosis (suspected osteomyelitis, bone lesion, metastatic workup). In turn, this drives the ICD-10 pairing and shows medical need.
6. Specimen handling: Note that a bone core specimen was taken and sent for pathology. Missing specimen notes are a common audit finding.

Accepted modifiers for CPT code 20220

CPT code 20220 accepts several standard surgical modifiers. However, choosing the wrong modifier, or leaving off a required one, is a top denial trigger.

Imaging guidance codes 77002, 77012, and 76942 with CPT 20220

Bone biopsies are often done under imaging guidance to confirm needle placement. For example, CT guidance for needle placement is reported with 77012. These guidance codes may be billed on their own with CPT code 20220. However, NCCI bundling edits and note requirements decide when that billing is valid.

Key rule for imaging guidance billing: you cannot report the guidance code when the procedure descriptor already includes imaging guidance. CPT 20220’s descriptor does not include guidance, so you may bill it separately when the note supports it. Still, add modifier 59 (or an X{EPSU} modifier) only if the current NCCI edit for the pair has a modifier indicator of 1. In addition, the note must support a distinct service. Check the current AAPC code reference and NCCI edit table before billing.

ICD-10-CM codes commonly paired with CPT 20220

The diagnosis code paired with CPT code 20220 must match the recorded reason for the biopsy, not the suspected finding. For orthopedic and sports medicine practices, the most common ICD-10-CM pairings fall into three groups: suspected malignancy, infection workup, and metabolic bone disease evaluation.

These pairings are examples of common cases, not a strict list. Rather, the ICD-10-CM code must match the reason for the biopsy recorded at the visit, using the most specific code available. For suspected osteomyelitis, M86.9 fits only when the note documents no type or site.

Medicare reimbursement rates for CPT code 20220 (2026 fee schedule)

Medicare pays CPT code 20220 at different rates depending on where the procedure takes place. The CMS Physician Fee Schedule lookup tool is the best source for local rates. The national figures below come from the CMS CY2026 RVU file. As a result, your MAC locality rate will differ.

The non-QP amounts use the $33.4009 conversion factor, and qualifying APM participants are paid at $33.5675. Both are national amounts before Geographic Practice Cost Index (GPCI) adjustment. GPCIs then adjust the rate by MAC locality. For instance, a practice in Manhattan is paid a different amount than one in rural Montana for the same 20220 claim.

Prior authorization requirements for CPT 20220

Medicare fee-for-service does not always require prior authorization for CPT code 20220. However, many Medicare Advantage plans and commercial payers do. Rules vary by plan, contract, and state, so check with each payer before scheduling.

• Medicare Advantage: Many MA plans require prior auth for bone biopsy. In that case, submit the imaging report, clinical notes on the reason for the biopsy, and the planned CPT and ICD-10 codes.
• Commercial payers: Prior auth rules range from full clinical review to automatic approval based on diagnosis. So, check payer portals or call provider relations before the procedure date.
• What to submit: Include the ordering provider’s reason for the biopsy, any imaging reports (X-ray, CT, MRI), the biopsy site, the planned CPT code (20220), and the planned ICD-10 pairing.
• Missing auth: If you perform CPT code 20220 without a required authorization, the denial is hard to overturn later. Therefore, get prior auth before any elective procedure.

Common denial reasons for CPT 20220 and how to prevent them

CPT code 20220 claims deny for a familiar set of reasons. Fortunately, each one maps to a fix you can build into your pre-submission workflow.

• Wrong depth code: 20225 submitted when the operative note documents a superficial site. Fix: have coders confirm the bone site against the 20220/20225 depth table before they send the claim. A structured denial management workflow catches this at pre-bill review.
• Missing operative report: The claim goes out without the procedure note attached or on file. Fix: set up a note-to-claim check so no CPT 20220 claim leaves without an attached or retrievable note.
• No prior authorization: The procedure was done without the auth a commercial or MA plan required. Fix: add an auth check to the booking process before you schedule.
• E/M billed same date without modifier: An evaluation and management code is billed on the same date as CPT code 20220 without modifier 25. Fix: teach schedulers and coders to flag same-day E/M and procedure pairs for modifier review.
• Incorrect place of service: POS code does not match where the procedure was performed. For instance, a non-facility rate billed for a hospital-based procedure, or the reverse, triggers an edit. Fix: confirm the POS code on the claim matches the real setting.
• NCCI bundling conflict: An imaging guidance code is billed with CPT code 20220 when the NCCI edit bundles the pair. Likewise, the same denial follows a modifier the edit does not allow. Review the current NCCI edit table for the specific code pair. The guide to medical billing denial codes lists the CARC codes most often returned on bundling denials.

A medical claims clearinghouse with real-time claim scrubbing catches many of these issues before they reach the payer. As a result, it cuts avoidable denials on musculoskeletal procedure codes.

Global period, bundling rules, and place-of-service considerations

CPT code 20220 carries a 000-day global period in the CY2026 Medicare Physician Fee Schedule, the same as 20225. Confirm it in the CMS MPFS file each year, since CMS can change global assignments.

With a 000 global, the main risk sits on the biopsy date itself. Specifically, an E/M billed that day needs modifier 25 and a note showing separate work. Good medical billing workflows flag same-day E/M visits for modifier review before claim submission rather than after a denial.

How Pabau gets CPT 20220 claims out cleanly

A bone biopsy claim often stalls between the signed procedure note and the claim form. Staff rekey the CPT code, the ICD-10 pairing and the patient details. Each rekey, in turn, is a chance for error.

Pabau pulls existing record data into a pre-filled claim and submits and tracks it through Claim.MD, our US clearinghouse partner. Your coder still checks the depth code, modifiers and place of service against the operative note. Then the claim goes out without retyping.

As a result, you get fewer typing errors and a visible status on every 20220 claim once it leaves the practice.

Get bone biopsy claims out without rekeying

Pabau pulls existing record data into a pre-filled claim and submits and tracks it through Claim.MD. See how orthopedic and musculoskeletal practices bill CPT 20220 in Pabau.

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Conclusion

CPT code 20220 is a straightforward percutaneous bone biopsy code. Its most common billing problems stem from one failure: operative notes that do not clearly show anatomical depth. Fortunately, a structured pre-submission review can prevent many depth-related 20220 denials. To start, make the bone site, the approach and any saved guidance images required fields in the procedure note. Then the choice between 20220 and 20225 becomes a quick check.

Pabau pulls existing record data into a pre-filled claim and submits and tracks it through Claim.MD, so a complete note becomes a claim without rekeying. That said, your coder still owns the final code check. Book a demo to see how orthopedic and musculoskeletal practices bill CPT code 20220 in Pabau.

Continue your research

Need to understand how clearinghouse scrubbing works before claims reach Medicare? Pabau’s Claim.MD clearinghouse guide explains real-time eligibility, 837P submission, and ERA processing for musculoskeletal procedures.

Want a framework for managing denials when CPT 20220 claims are rejected? Electronic remittance advice and ERA processing covers how to read 835 remittance files and use CARC denial reason codes to appeal rejected bone biopsy claims.

Looking to verify insurance coverage before scheduling a bone biopsy? Insurance eligibility verification outlines how real-time eligibility checks reduce same-day denial rates for procedural codes including 20220.

Frequently asked questions