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CPT 0666T Medicare payment status

Excluded from PFS

0666T · PFS Q4 2026

Status N: non-covered. Medicare covers no part of this service, so the PFS produces no payment amount.

View applicable payment rules
View CMS source and method

CMS RVU26DOctober 1 – December 31, 2026revision 2

PFS status evidence

Physician relative value file (Q4 2026) · rvu26d-updated-08-26-2026.zip (PPRRVU2026_Oct_nonQPP.csv row 626)
Inspect PFS status evidence
Code
0666T
Release
Q4 2026, revision 2
Result
Excluded from PFS

Citations

  • Shows this code’s PFS status (N). Result: Excluded from PFS.

    Physician relative value file (PPRRVU)CMS RVU26DOctober 1 – December 31, 2026revision 2

    This PFS record alone does not establish a $0 allowance or a coverage determination. Any amount from another schedule needs its own evidence.

    PPRRVU2026_Oct_nonQPP.csv row 626 in rvu26d-updated-08-26-2026.zip

    In the CMS file

    Loading rows 624–628 of PPRRVU2026_Oct_nonQPP.csv…

    Download rvu26d-updated-08-26-2026.zip from CMS File fingerprint 4d0d3f19bd954ffc0f5b8439169d267da023d4f6911f4539bb6e98723cb1a626

Plain-text summaryReport a problem

CPT 0666T has no published national rate. It carries status N (non-covered) in the Q4 2026 release. Medicare covers no part of this service. The blank amount means unpriced, not $0.

Why is there no national PFS amount for 0666T?

Its status indicator is N (non-covered). Medicare covers no part of this service. Status N: non-covered. Medicare covers no part of this service, so the PFS produces no payment amount.

Payment considerations Copy link

Here are the inputs and payment rules that apply to this code. Each link takes you to the detail below.

NCCI same-day edits Applies MUE behavior Applies
Other payment indicators (8)
Facility/non-facility: Not determined, Professional/technical component: Does not apply, Bilateral adjustment: Does not apply, Multiple-procedure reduction: Does not apply, Assistant/co-surgeon treatment: Does not apply, Global surgery: Does not apply, Other fee-schedule routing: Does not apply, Contractor pricing: Does not apply.
Why would a Medicare claim for 0666T be denied or paid less?

These come from CMS indicators on this page, not general billing advice.

  • Its status indicator is N (non-covered)—Medicare covers no part of this service. See status indicators
  • 88 codes form NCCI pairs with 0666T carrying modifier indicator 0—no NCCI-associated modifier bypasses the edit, so billed together on the same date of service, a line of the pair denies. See billing together
  • 243 codes pair with 0666T under modifier indicator 1—separately payable only when an NCCI-associated modifier (59, or a more specific XE, XS, XP, or XU) is clinically appropriate and the documentation supports a distinct service; without one, a line of the pair denies. See billing together
  • More than 1 unit per patient per date of service exceeds 0666T's Medically Unlikely Edit (MUE) limit. See billing together

Payer-specific coverage and documentation rules live outside these files, so a claim that clears every check here can still be denied on other grounds.

Which billing rules and modifiers apply? Copy link

Global period: what 0666T's fee already covers Copy link

XXX Does not apply

The global surgery concept does not apply to this code.

Can you bill it with another code? Copy link

Check a pair of codes Copy link

Enter a second CPT or HCPCS code billed on the same date of service. We'll check the current NCCI procedure-to-procedure edit for the pair.

See every current NCCI pair for 0666T →

Billing together (NCCI edits) Copy link

NCCI Q4 2026

Based on CMS's National Correct Coding Initiative (NCCI). A few examples appear here; use the complete edit page to check a specific pair.

Not separately payable with 0666T on the same date of service—no modifier bypasses the edit (modifier indicator 0)

0213T 0213T denies
0216T 0216T denies
36591 36591 denies

Showing 3 of 88.

Separately payable with 0666T only when an NCCI-associated modifier is appropriate and documented (modifier indicator 1)

0596T 0596T denies
0597T 0597T denies
0903T 0903T denies

Showing 3 of 243.

Modifier 59 and the X modifiers are not a universal bypass—CMS expects the most specific applicable modifier, and which one that is depends on the pair and the documented circumstances.

Check a paired code or view all 331 NCCI pairs →

Medically Unlikely Edit (MUE) limit: 1 unit per patient per date of service.

How has it changed? Copy link

Rate history by release Copy link

National Office (non-facility) amount for 0666T across quarterly releases.

Release Status Office Facility
Q4 2026 Oct 1, 2026 – present N — —
Q3 2026 Jul 1, 2026 – Sep 30, 2026 N — —
Q2 2026 Apr 1, 2026 – Jun 30, 2026 N — —
When does this rate change?

CMS publishes a fee schedule release every quarter (January, April, July, October), and each is versioned here. See what changed each release, or get an email when a new release moves rates.

Sources: CMS Medicare Physician Fee Schedule Relative Value Files.

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Source & method

Show sources

This page uses CMS's Medicare Physician Fee Schedule Q4 2026 release (effective October 2026). National baselines use GPCI 1.000 and exclude sequestration. Whether a national amount exists depends on the status and CMS’s payment instructions; blank RVUs are never treated as zero. Past releases are never edited, so these sources stay valid after CMS publishes a newer one. Our methodology explains sourcing, parsing, versioning, and how we cross-check claims before we publish them.

Physician relative value file (Q4 2026) · rvu26d-updated-08-26-2026.zip (PPRRVU2026_Oct_nonQPP.csv row 626)

Cite this rate

The citation names the release, so anyone can check it even after CMS publishes a newer one.

CPT 0666T National PFS baseline: No national PFS rate (Q4 2026; participating physician; whole service; GPCI 1.000; sequestration excluded). CMS RVU26D, PPRRVU2026_Oct_nonQPP.csv row 626. Localis. https://localishealth.com/cpt/0666T/2026/D