`0477U`

What 0477U is

This code appears in the Medicare NCCI edit tables. It has no RVUs in the CY2026 Physician Fee Schedule file.

Medically Unlikely Edit (MUE)

Medicare caps 0477U at 1 unit per date of service for practitioner claims (MAI 2 - date of service edit (absolute): units above the MUE never pay), rationale: Code Descriptor / CPT Instruction. Units above the cap are denied unless the edit's adjudication rules allow an appeal with documentation.

Billed with 0477U? These codes are bundled into it

0477U is a Column 1 code in 32 active NCCI PTP edits. When one of these Column 2 codes is reported on the same date of service, it is denied as bundled - unless the edit's modifier indicator is 1 and documentation supports a distinct service with an NCCI-associated modifier.

Column 2 code	Short description	Modifier indicator
`0519U`		1 - modifier may bypass	Check pair
`36591`	Draw blood off venous device	0 - no modifier bypass	Check pair
`36592`	Collect blood from picc	0 - no modifier bypass	Check pair
`80503`	Path clin consltj sf 5-20	1 - modifier may bypass	Check pair
`80504`	Path clin consltj mod 21-40	1 - modifier may bypass	Check pair
`80505`	Path clin consltj high 41-60	1 - modifier may bypass	Check pair
`81225`	Cyp2c19 gene com variants	1 - modifier may bypass	Check pair
`81227`	Cyp2c9 gene com variants	1 - modifier may bypass	Check pair
`81230`	Cyp3a4 gene common variants	1 - modifier may bypass	Check pair
`81231`	Cyp3a5 gene common variants	1 - modifier may bypass	Check pair
`81306`	Nudt15 gene common variants	1 - modifier may bypass	Check pair
`81335`	Tpmt gene com variants	1 - modifier may bypass	Check pair
`81346`	Tyms gene com variants	1 - modifier may bypass	Check pair
`81400`	Mopath procedure level 1	1 - modifier may bypass	Check pair
`81401`	Mopath procedure level 2	1 - modifier may bypass	Check pair
`81402`	Mopath procedure level 3	1 - modifier may bypass	Check pair
`81403`	Mopath procedure level 4	1 - modifier may bypass	Check pair
`81404`	Mopath procedure level 5	1 - modifier may bypass	Check pair
`81405`	Mopath procedure level 6	1 - modifier may bypass	Check pair
`81406`	Mopath procedure level 7	1 - modifier may bypass	Check pair
`84311`	Spectrophotometry	1 - modifier may bypass	Check pair
`88271`	Cytogenetics dna probe	1 - modifier may bypass	Check pair
`88272`	Cytogenetics 3-5	1 - modifier may bypass	Check pair
`88273`	Cytogenetics 10-30	1 - modifier may bypass	Check pair
`88274`	Cytogenetics 25-99	1 - modifier may bypass	Check pair
`88275`	Cytogenetics 100-300	1 - modifier may bypass	Check pair
`88291`	Cyto/molecular report	1 - modifier may bypass	Check pair
`88367`	Insitu hybridization auto	1 - modifier may bypass	Check pair
`88374`	M/phmtrc alys ishquant/semiq	1 - modifier may bypass	Check pair
`88377`	M/phmtrc alys ishquant/semiq	1 - modifier may bypass	Check pair

Showing 30 of 32 column 2 codes. Use the pair checker for any specific combination.

0477U is bundled into these codes

0477U appears as a Column 2 code in 12 active edits. Reported with one of these Column 1 codes on the same date of service, 0477U is the code that denies.

Column 1 code	Short description	Modifier indicator
`0070U`		0	Check pair
`0173U`		0	Check pair
`0175U`		0	Check pair
`0345U`		0	Check pair
`0392U`		0	Check pair
`0411U`		0	Check pair
`0419U`		0	Check pair
`0437U`		0	Check pair
`81226`	Cyp2d6 gene com variants	0	Check pair
`81407`	Mopath procedure level 8	1	Check pair
`81408`	Mopath procedure level 9	1	Check pair
`81418`	Rx metab gen seq alys pnl 6	0	Check pair

Data: CMS CY2026 Physician Fee Schedule RVU file (October release, RVU26D) and Medicare NCCI PTP practitioner edits v32.3 (2026 Q4). Verify against the official files before billing or contracting decisions.