Surgical · Other

Impression and custom preparation of a surgical obturator prosthesis — a molded intraoral device that occludes a surgically created opening such as a palatal defect following maxillectomy.

Verified May 8, 2026 · 5 sources ↓

Medicare: $919.86
Work RVU: 13.07
Global, days: 10
Region: Other

Drawn from CMSAAPCForwardhealth

Documentation requirements

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

Source · Editorial brief grounded in 5 cited references ↓

Operative or clinical note documenting the nature and extent of the surgical defect (e.g., maxillectomy, palatal resection) that necessitates the obturator
Description of the impression technique used and materials applied to capture the intraoral structures
Notation confirming this is a surgical obturator (immediate/perioperative), not an interim or definitive device — distinguishes 21076 from 21079 and 21080
Diagnosis code(s) linking the defect to a qualifying condition (e.g., malignant neoplasm of palate, traumatic defect) to establish medical necessity
Prior authorization documentation where required by payer — most commercial plans and Medicare Advantage require PA for maxillofacial prosthetics
Provider credentials confirming the service was performed or directly supervised by a qualified physician or maxillofacial prosthodontist with appropriate scope of practice

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 52 Reduced services 59 Distinct service 76 Repeat, same physician 77 Repeat, another physician 78 Unplanned return — related XS Separate structure

What this code covers

Source · Editorial summary grounded in 5 cited references ↓

CPT 21076 covers the impression-taking and custom fabrication of a surgical obturator prosthesis. The provider takes an intraoral impression immediately after or in close conjunction with surgery — capturing the dimensions of the residual defect, remaining teeth, and surrounding structures — then prepares a custom prosthetic device that physically obturates the opening. This is typically performed following partial or total maxillectomy, with the surgical obturator serving as an immediate post-resection device that restores separation between the oral and nasal cavities, enabling the patient to speak and swallow in the acute post-surgical period.

This code sits within the 21076–21089 family of maxillofacial prosthetic impression and custom preparation codes. 21076 specifically designates the surgical obturator — the temporary device placed at or immediately after resection — distinguishing it from the interim obturator (21079) placed later during healing and the definitive obturator (21080) fabricated once the surgical site has stabilized. Using the wrong code in this sequence is a common audit trigger.

Most payers, including Medicare, require prior authorization for maxillofacial prosthetics and treat medical necessity documentation as mandatory rather than advisory. The 010-day global period means post-procedural follow-up within 10 days is bundled; charges for routine adjustments during that window require modifier 24 if unrelated to the prosthesis work or are otherwise not separately billable.

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 (13.07) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (27.54) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	13.07
Practice expense RVU	12.8
Malpractice RVU	1.67
Total RVU	27.54
Medicare national rate	$919.86
Global period	10 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	$919.86
HOPD (APC 5163) Hospital outpatient department	$1,585.19
ASC (PI P3) Ambulatory surgical center (freestanding)	$429.66

Common denial reasons

The recurring reasons claims for CPT 21076 get rejected.

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

Wrong code in the obturator sequence — billing 21076 when the device is an interim or definitive obturator (21079 or 21080) triggers downcoding or denial on audit
Missing or inadequate prior authorization — most payers treat maxillofacial prosthetics as requiring PA; submitting without it results in automatic denial
Insufficient medical necessity documentation — a note that references 'prosthesis fabricated' without tying the device to a specific surgical defect and diagnosis fails coverage criteria
Site-of-service mismatch — payment rates differ substantially between HOPD and ASC settings; billing under the wrong facility type triggers recoupment
Global period bundling — attempting to bill follow-up adjustments or fitting visits within the 10-day global without a valid modifier

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 5 cited references ↓

01What distinguishes 21076 from 21079 and 21080?

21076 is the surgical obturator — placed at or immediately after resection to temporarily close the defect. 21079 is the interim obturator, fabricated after initial healing begins. 21080 is the definitive obturator made once the surgical site has fully stabilized. The clinical timing and purpose of the device determine the correct code, not just its physical appearance.

02Does Medicare routinely cover 21076?

Medicare Part B may cover prosthetic devices deemed medically necessary and prescribed by a physician, but maxillofacial prosthetics frequently require prior authorization and detailed documentation of the underlying surgical defect. Coverage is not automatic — verify with your MAC before service when possible.

03What is the global period for 21076, and what does it bundle?

21076 carries a 010-day global period. Routine follow-up care, minor adjustments, and fitting visits within those 10 days are bundled into the procedure payment. Bill a separate E/M within the global only if it addresses an unrelated problem, and append modifier 24.

04Can 21076 be billed on the same day as the resection surgery?

Yes — the surgical obturator impression is typically taken intraoperatively or on the day of surgery. If billed same-day as a separate surgical procedure, append modifier 59 to identify it as a distinct service. Document that the impression and custom preparation constituted a separately identifiable clinical effort from the resection itself.

05Why is the ASC payment for 21076 so much lower than the HOPD rate?

The HOPD rate reflects hospital facility overhead under the OPPS; the ASC rate is set under a separate ASC payment schedule that typically reimburses at a lower level for maxillofacial prosthetic preparation services. See the Site of Service comparison on this page for the current values. Bill under the correct facility type — a mismatch triggers recoupment.

06Which diagnosis codes most commonly support 21076?

Malignant neoplasms of the palate, maxilla, or oral cavity are the most frequent qualifying diagnoses. Traumatic defects and congenital conditions can also support coverage, but the operative note must directly connect the defect to the prosthesis. Payer-specific LCD or coverage policy may restrict covered diagnoses — check your MAC's local coverage determinations.

Sources & references

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

Mira AI Scribe

Mira's AI scribe captures the type of prosthetic device prepared (surgical obturator), the specific intraoral defect site, the impression technique documented in the operative or clinical note, and the diagnosis driving fabrication. This prevents the most common audit trigger for this code family — an operative note that records prosthesis fabrication without specifying device type, which auditors use to reclassify a 21076 claim to the lower-paying interim or definitive obturator codes.

See how Mira captures CPT 21076 documentation