Autogenous rib cartilage harvested and grafted to the face, chin, nose, or ear in a single operative session — graft harvest is included and not separately billable.

Verified May 8, 2026 · 7 sources ↓

Medicare: $659.67
Work RVU: 10.89
Global, days: 90
Region: Other

Drawn from CMSCoaccessAAPCAnthemEntnet

Documentation requirements

What must appear in the operative or office note to support the claim.

Source · Editorial brief grounded in 7 cited references ↓

Specify the donor site explicitly — document rib level and harvest technique (full-thickness vs. outer lamella only) to support medical necessity and distinguish from 21235
Document the recipient site anatomy and the deformity being corrected (congenital, post-traumatic, tumor resection, revision) with clinical findings
Record graft shaping details — dimensions and configuration carved (dorsal strut, columellar strut, onlay, L-structure) relevant to complexity
Operative note must confirm the cartilage was autogenous and obtained from the patient's own rib during the same operative session
Include pre-operative photos and diagnosis supporting reconstructive vs. cosmetic distinction — payers require functional or structural indication for coverage
If concurrent rhinoplasty or other facial procedure is performed, document each procedure's distinct purpose to support modifier 59 unbundling where applicable

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 51 Multiple procedures 59 Distinct service 76 Repeat, same physician 77 Repeat, another physician 78 Unplanned return — related 79 Unrelated during global

What this code covers

Source · Editorial summary grounded in 7 cited references ↓

CPT 21230 covers the complete procedure of harvesting cartilage from the patient's own rib and grafting it to a facial structure — chin, nose, or ear. Because the code description explicitly includes obtaining the graft, you cannot separately bill a cartilage harvest code (e.g., 20910) for the rib harvest performed in the same session. The graft is shaped and placed to correct deformities from trauma, tumor resection, congenital conditions (microtia, saddle nose deformity), or failed prior grafts.

The 90-day global period means all routine post-op care through day 90 is bundled. When 21230 is performed alongside a rhinoplasty code (30400–30462, 30450), check current NCCI edits — payer positions vary on whether modifier 59 will unbundle the graft from the primary rhinoplasty, and some payers (see Anthem ANC.00008) classify 21230 as potentially cosmetic absent documented functional or reconstructive indication.

Distinguish 21230 from 21235, which covers ear cartilage (not rib) grafted to the nose or ear. Using 21235 when the operative note describes rib harvest and carving is a coding error that survives pre-submission edits but fails audit.

RVU & reimbursement

Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU vs. total RVU

The work RVU (10.89) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (19.75) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	10.89
Practice expense RVU	7.11
Malpractice RVU	1.75
Total RVU	19.75
Medicare national rate	$659.67
Global period	90 days

Payment by site of service

Medicare pays different rates by setting. HOPD typically pays substantially more than ASC for the same procedure.

Source · CMS OPPS Addendum B·ASC HCPCS payment rates·2026

Setting	Medicare rate (national)
Office (PFS non-facility) Procedure performed in physician's office	$659.67
HOPD (APC 5165) Hospital outpatient department	$6,048.05
ASC (PI A2) Ambulatory surgical center (freestanding)	$3,025.62

Common denial reasons

The recurring reasons claims for CPT 21230 get rejected.

Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓

Cosmetic exclusion — payer determines the procedure was performed for aesthetic enhancement without documented reconstructive or functional indication
Unbundling denial when billed alongside rhinoplasty codes (30400–30462, 30450) — payer treats graft as integral to the primary procedure without modifier 59 and supporting documentation
Wrong code — 21230 submitted when operative note describes ear cartilage harvest, which maps to 21235, triggering a medical-record mismatch on audit
Separate harvest code (20910) billed in addition to 21230 — duplicate payment denied because harvest is included in 21230 by code definition
Missing prior authorization — many commercial payers require PA for facial reconstructive procedures before the operative date

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 7 cited references ↓

01Can I bill 20910 (costochondral cartilage graft) separately when I also bill 21230?

No. CPT 21230 explicitly includes obtaining the graft. Billing 20910 for the same rib harvest on the same date is a duplicate that NCCI bundles — it will deny with or without a modifier.

02How do I distinguish 21230 from 21235?

21230 = rib cartilage grafted to face, chin, nose, or ear. 21235 = ear cartilage grafted to nose or ear. The donor site determines the code. If the surgeon harvested rib, use 21230. If the note just says 'cartilage graft' without identifying the donor site, send it back for clarification before coding.

03Can 21230 be billed on the same day as a rhinoplasty code like 30450?

Check current NCCI edits first. Some rhinoplasty codes do not have a hard bundle with 21230, but payers vary. When the procedures are distinct and separately documented, modifier 59 is the correct unbundling modifier. Attach the operative note.

04What modifier applies if the patient returns to the OR during the 90-day global for a related complication involving the graft?

Modifier 78 — unplanned return to the OR for a related procedure during the postoperative period. Do not use 79 (unrelated) if the return is for graft-site or recipient-site complications tied to the original 21230.

05Is 21230 covered for cosmetic rhinoplasty?

No. Payers including Medicare and major commercial carriers (see Anthem ANC.00008) require a documented reconstructive or functional indication — congenital deformity, post-traumatic deformity, tumor resection, or saddle nose with structural compromise. Purely aesthetic augmentation is excluded.

06Does the 90-day global period for 21230 interact with the global period of a same-day rhinoplasty?

When both procedures share the same date of service, the single longest global period governs for post-op care. Both rhinoplasty codes and 21230 carry 90-day globals, so routine follow-up through day 90 is bundled regardless of which code you treat as primary.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira Scribe

Mira's AI scribe captures the rib level harvested, harvest technique (full-thickness or outer lamella), graft dimensions and configuration as carved, and recipient site anatomy with the named deformity corrected. That specificity prevents the two most common denials: cosmetic exclusion from vague indication language and a 21235 mismatch when the coder can't confirm from a thin operative note whether rib or ear cartilage was used.

See how Mira captures CPT 21230 documentation