`0051U`

What 0051U 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 0051U 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 0051U? These codes are bundled into it

0051U is a Column 1 code in 117 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
`0054U`		0 - no modifier bypass	Check pair
`0093U`		0 - no modifier bypass	Check pair
`0110U`		0 - no modifier bypass	Check pair
`0116U`		0 - no modifier bypass	Check pair
`0119U`		1 - modifier may bypass	Check pair
`0519U`		1 - modifier may bypass	Check pair
`0520U`		1 - modifier may bypass	Check pair
`80150`	Assay of amikacin	0 - no modifier bypass	Check pair
`80155`	Drug assay caffeine	0 - no modifier bypass	Check pair
`80156`	Assay carbamazepine total	0 - no modifier bypass	Check pair
`80157`	Assay carbamazepine free	0 - no modifier bypass	Check pair
`80158`	Drug assay cyclosporine	0 - no modifier bypass	Check pair
`80159`	Drug assay clozapine	0 - no modifier bypass	Check pair
`80162`	Assay of digoxin total	0 - no modifier bypass	Check pair
`80163`	Assay of digoxin free	0 - no modifier bypass	Check pair
`80164`	Assay dipropylacetic acd tot	0 - no modifier bypass	Check pair
`80165`	Dipropylacetic acid free	0 - no modifier bypass	Check pair
`80168`	Assay of ethosuximide	0 - no modifier bypass	Check pair
`80169`	Drug assay everolimus	0 - no modifier bypass	Check pair
`80170`	Assay of gentamicin	0 - no modifier bypass	Check pair
`80171`	Drug screen quant gabapentin	0 - no modifier bypass	Check pair
`80173`	Assay of haloperidol	0 - no modifier bypass	Check pair
`80175`	Drug screen quan lamotrigine	0 - no modifier bypass	Check pair
`80176`	Assay of lidocaine	0 - no modifier bypass	Check pair
`80177`	Drug scrn quan levetiracetam	0 - no modifier bypass	Check pair
`80178`	Assay of lithium	0 - no modifier bypass	Check pair
`80180`	Drug scrn quan mycophenolate	0 - no modifier bypass	Check pair
`80183`	Drug scrn quant oxcarbazepin	0 - no modifier bypass	Check pair
`80184`	Assay of phenobarbital	0 - no modifier bypass	Check pair
`80185`	Assay of phenytoin total	0 - no modifier bypass	Check pair

Showing 30 of 117 column 2 codes. Use the pair checker for any specific combination.

0051U is bundled into these codes

0051U appears as a Column 2 code in 6 active edits. Reported with one of these Column 1 codes on the same date of service, 0051U is the code that denies.

Column 1 code	Short description	Modifier indicator
`0007U`		0	Check pair
`0082U`		0	Check pair
`0227U`		0	Check pair
`0328U`		0	Check pair
`0517U`		1	Check pair
`G0483`	Drug test def 22+ classes	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.