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Last Updated: August 10, 2026
Key takeaways
CPT code 20910 covers the harvest of costochondral rib cartilage for use as a graft in reconstructive surgery.
Medicare pays the same national allowed amount of roughly $463.94 whether the harvest happens in a facility or an office.
The code carries a 090-day global period, so routine follow-up inside 90 days is bundled into that single payment.
Separate reporting alongside the primary reconstruction is allowed, but code-pair edits change quarterly and must be checked before every claim.
Practice management software like Pabau links operative notes to procedure codes, cutting the transcription errors behind most 20910 denials.
CPT code 20910 is the billing code for a costochondral cartilage graft, the harvest of rib cartilage for use in reconstructive surgery.
It sits in the General Grafts or Implants range (20900-20938) of the American Medical Association CPT code set. Coders reporting it have to confirm separate reportability, document donor-site anatomy, and account for a 090-day global period.
This reference covers the 2026 fee schedule, the RVU breakdown, modifiers, ICD-10 pairings, and documentation requirements. It is written for medical coders, surgical billers, and practice managers at musculoskeletal practices and reconstructive surgery teams.
One quirk is worth knowing up front. Payment for 20910 is identical in a facility and in an office, so the usual place-of-service split does not apply here.
CPT code 20910: Official description and clinical context
CPT code 20910 describes a single harvesting procedure, the costochondral cartilage graft. The surgeon removes cartilage from the costochondral junction, where rib cartilage meets rib bone, and transplants it to a separate reconstruction site.
The harvested cartilage works as a structural autograft, giving the recipient site shape, support, and volume.
The code sits in the CPT 20900-20938 General Grafts or Implants section, alongside bone, fascia, and nasal septum graft codes. Use 20910 only for costochondral rib cartilage, never for nasal or ear cartilage.
Common reconstructive applications where 20910 is reported include:
- Auricular reconstruction, rebuilding the ear framework, most often for microtia repair
- Mandibular reconstruction after oncologic resection or trauma
- Facial skeletal reconstruction of the orbital floor, nasal dorsum, or malar support
- Temporomandibular joint (TMJ) reconstruction
- Laryngotracheal reconstruction
Plastic surgery and craniofacial teams often work from a plastic surgery EMR that ties clinical documentation to billing. That link makes it harder to miss the donor-site harvest code at claim time.
Fee schedule and reimbursement rates in 2026
Most surgical CPT codes pay more in the office than in a facility, because the practice absorbs the overhead. CPT code 20910 is an exception. Its practice expense RVU is identical in both settings, so the national allowed amount comes out the same wherever the harvest is performed.
That figure is the published national allowed amount under the Medicare Physician Fee Schedule (MPFS). Commercial payers negotiate their own rates, and the national number moves each year with the MPFS Final Rule.
Check your locality’s figure in the CMS fee schedule look-up tool before you set a fee schedule or audit a payment.
Relative value units (RVUs) and what they cover
The Resource-Based Relative Value Scale assigns three RVU components to every CPT code. CMS publishes the current values in its relative value files, which is the source to check when a payer’s math does not match yours.
A work RVU of 5.39 reflects the surgical complexity of a rib cartilage harvest, which requires chest wall entry. The practice expense component of 7.35 is the largest of the three, and it does not fall in a facility setting.
RVU values are revised each year under the MPFS Final Rule, so confirm them against the current CMS data file.
Global period and separate reportability rules
CPT code 20910 carries a 090-day global period. Related services from one day before surgery through 90 days after are bundled into the single payment. Routine follow-up visits inside that window cannot be billed separately under Medicare rules.
The harder question is whether 20910 can be reported alongside the primary reconstruction. These rules decide the answer:
- 20910 may be reported separately from the primary reconstructive code, such as 21179, when the operative note documents the harvest as a distinct step.
- Code-pair edits apply. The National Correct Coding Initiative (NCCI) publishes Procedure-to-Procedure edit pairs. Check your specific 20910 pairing for an active edit before billing the two codes separately.
- Modifier -51 is often appended when 20910 is billed alongside the primary procedure. Some payers require it, others exempt graft harvest codes, so check the payer’s instructions.
- Prior authorization is common for the full surgical episode. One request usually covers the primary procedure and every harvesting code with it.
Compliance management workflows that flag NCCI edits before submission prevent most separate-reportability denials.
Pro Tip
Run every 20910 and primary reconstruction pairing through the current NCCI edit table before you submit. The edits update quarterly. A pairing that was separately billable last quarter can be bundled today, so build a quarterly review into the coding calendar.
Applicable modifiers and when to use them
Modifier choice for 20910 depends on the payer, and on whether the code is reported alongside a primary reconstruction.
Modifier -51 exemption status varies by payer. Some commercial insurers exempt graft harvest codes from the -51 payment reduction. Check each payer’s policy first, so you do not cut your own payment on a code the payer treats as exempt.
ICD-10 diagnosis codes that support medical necessity
Medical necessity for 20910 rests on the ICD-10-CM diagnosis code. The diagnosis should describe the condition that requires reconstruction, not the harvest itself.
Confirm the code you choose is covered under the applicable Local Coverage Determination (LCD) from your Medicare Administrative Contractor.
Not every pairing guarantees payment. LCDs and commercial payer policies define the covered diagnosis list. Use the AAPC CPT-to-ICD-10 crosswalk to check that your diagnosis maps to 20910 under current guidance.
Congenital indications like microtia follow the same coding logic as other structural anomaly codes, including Q13.1. Trauma indications turn on the seventh character, the detail that trips coders up on codes such as S62.163P.
Documentation requirements for a CPT code 20910 claim
Weak operative note documentation is the main reason 20910 claims are denied or downcoded. The note has to stand on its own as evidence that the harvest was a distinct procedural step. Dictation tools that write straight into the clinical record keep documentation problems away from the claim.
Required operative note elements for a 20910 claim:
- Donor-site anatomy. Name the ribs accessed, the costochondral junction approach, and the size of cartilage harvested.
- Medical necessity. Connect the harvest to the reconstructive goal, such as cartilage taken from the sixth rib for an auricular framework.
- Separate procedural detail. If you bill 20910 on its own line, the note must describe the harvest as a discrete step with its own detail.
- Time and complexity. For a modifier -22 claim, record the extra time, the added complexity, or the unexpected findings.
- Donor-site closure. Document how the site was closed, which confirms the procedure was completed and supports the global period.
The same documentation discipline applies to facial trauma repairs such as 21422. Structured templates get these elements captured while the surgeon dictates, rather than leaving billing staff to chase an addendum weeks later.
Related CPT codes and code crosswalk
The 20900-20938 range holds several codes that coders meet alongside 20910, or instead of it. Use the AAPC Codify CPT lookup for the full descriptor and bundling guidance on each one.
The most frequent error is reporting 20912 when the donor site was the rib. Auditors flag it as anatomically inconsistent whenever the operative report describes a chest wall incision. Match the code to the documented donor site.
Graft codes elsewhere in the CPT set follow their own bundling logic, as 15157 shows. Read the descriptor before you assume the harvest is billable on a separate line.
How Pabau connects operative notes to graft claims
Surgical graft codes fail more often on workflow than on code choice. When the operative note, the code selection, and the claim live in separate systems, a harvest code goes missing at every handoff.
Pabau’s claims management software keeps the operative note next to the procedure code and modifier fields. A coder reviewing a 20910 claim can confirm donor-site documentation, laterality, and the separate procedural narrative without leaving the billing screen.
That saves the addenda round trip, which is what usually delays a reconstructive surgery claim by a week or more.
Volume practices also gain from auditing CPT use over time. Reporting inside Pabau’s practice management software surfaces cases where 20910 was never billed, even though the operative note documented rib access.
Pro Tip
Audit your reconstructive cases every quarter for 20910 under-reporting. Pull every case coded for auricular, mandibular, or TMJ reconstruction and check whether a separate harvest code was billed. Missing harvest codes on cases where the note documents rib access are recoverable revenue.
Keep every graft harvest code on the claim
Pabau links operative notes, procedure codes, and modifiers in one clinical record. Your billing team has what it needs at claim time, without chasing surgeons for addenda.
Conclusion
Two habits decide whether a rib cartilage harvest gets paid. Check the code pairing against the current edit table, and make the surgeon’s note describe the harvest as its own step.
The payment quirk is worth carrying forward too. Because 20910 pays the same in both settings, there is no reason to route a case to the office to protect the fee.
Get both right and the denials that follow reconstructive cases mostly stop arriving. Book a demo to see how Pabau keeps operative notes and billing codes in one record.
Continue your research
Billing another facial plastic procedure? CPT code 21282 sets out lateral canthopexy billing, RVUs, and the modifiers payers expect.
Working on airway reconstruction cases? CPT code 21685 covers hyoid myotomy and suspension, including global period and documentation rules.
Coding spinal reconstruction alongside grafts? CPT code 22212 explains thoracic osteotomy billing and how graft codes pair with it.
Coding errors tracing back to training? EHR training shows how to onboard clinical staff so documentation lands right the first time.
Frequently asked questions
What is CPT code 20910?
CPT code 20910 is the billing code for a costochondral cartilage graft. It covers harvesting cartilage from the rib, at the costochondral junction, for use as a structural autograft in reconstructive surgery. The code sits in the General Grafts or Implants section, CPT 20900-20938, of the AMA CPT code set.
What is the global period for CPT code 20910?
CPT code 20910 has a 090-day global period. Routine follow-up services within 90 days of the procedure are bundled into the single payment and cannot be billed separately under Medicare.
Does Medicare cover CPT code 20910?
Medicare covers CPT code 20910 when medical necessity is documented and the procedure is performed for a covered reconstructive indication. Coverage depends on the Local Coverage Determination that applies in your area and on the supporting ICD-10-CM diagnosis code. Verify coverage with the relevant contractor before billing.
Can CPT code 20910 be billed separately from the primary procedure?
Yes. CPT code 20910 can be reported separately from the primary reconstructive procedure when the operative note documents the harvest as a distinct step. NCCI Procedure-to-Procedure edits still have to be checked for each pairing. Some combinations are bundled and need modifier -59 plus supporting documentation to unbundle.
What is the fee schedule for CPT 20910 in 2026?
The published national allowed amount for CPT code 20910 is about $463.94. It is the same in a facility and in an office, because the practice expense RVU does not change between settings. Your locality figure will differ, so check the CMS Physician Fee Schedule look-up tool before you rely on it.
How does CPT 20910 differ from CPT 20912?
CPT code 20910 covers cartilage harvested from the rib at the costochondral junction. CPT code 20912 covers cartilage harvested from the nasal septum. The two codes describe different donor sites and different surgical approaches. Reporting 20912 when the note documents a chest wall incision is an auditable inconsistency.
