`C9797`

What C9797 is

Vascular embolization or occlusion procedure with use of a pressure-generating catheter (e.g., one-way valve or occlusion balloon, intermittently or temporarily occluding), inclusive of all radiological supervision and interpretation, intraprocedural roadmapping, and imaging guidance necessary to complete the intervention; for tumors, organ ischemia, or infarction

HCPCS Level II long description, CMS October 2026 file. See the C codes page for the full section.

Medically Unlikely Edit (MUE)

Medicare caps C9797 at 1 unit per date of service for practitioner claims (MAI 3 - date of service edit (clinical): units above the MUE may pay with documentation on appeal), rationale: Nature of Service/Procedure. Units above the cap are denied unless the edit's adjudication rules allow an appeal with documentation.

Billed with C9797? These codes are bundled into it

C9797 is a Column 1 code in 274 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
`0075T`	Perq stent/chest vert art	1 - modifier may bypass	Check pair
`00840`	Anes iper px lower abd nos	0 - no modifier bypass	Check pair
`00860`	Anes xtrprtl px lwr abd nos	0 - no modifier bypass	Check pair
`01916`	Anes dx arteriography/vngrph	0 - no modifier bypass	Check pair
`01924`	Anes ther ivntl rad artl nos	0 - no modifier bypass	Check pair
`01925`	Anes ivntl rad artl crtd/c	0 - no modifier bypass	Check pair
`01926`	Anes ivntl rad icr icar/aort	0 - no modifier bypass	Check pair
`0213T`	Njx paravert w/us cer/thor	0 - no modifier bypass	Check pair
`0216T`	Njx paravert w/us lumb/sac	0 - no modifier bypass	Check pair
`0395T`	Hdr elctr ntrst/ntrcv brchtx	1 - modifier may bypass	Check pair
`0524T`	Ev cath dir chem abltj w/img	0 - no modifier bypass	Check pair
`0596T`	Temp fml iu vlv-pmp 1st insj	1 - modifier may bypass	Check pair
`0597T`	Temp fml iu valve-pmp rplcmt	1 - modifier may bypass	Check pair
`0632T`	Perq tcat us abltj nrv p-art	1 - modifier may bypass	Check pair
`0708T`	Id ca immntx prep & 1st njx	1 - modifier may bypass	Check pair
`0903T`	Ecg alg 12 lead reduced i&r	1 - modifier may bypass	Check pair
`0904T`	Ecg alg 12 ld rdcd trcg only	1 - modifier may bypass	Check pair
`0905T`	Ecg alg 12 ld rdcd i&r only	1 - modifier may bypass	Check pair
`12001`	Rpr s/n/ax/gen/trnk 2.5cm/<	1 - modifier may bypass	Check pair
`12002`	Rpr s/n/ax/gen/trnk2.6-7.5cm	1 - modifier may bypass	Check pair
`12004`	Rpr s/n/ax/gen/trk7.6-12.5cm	1 - modifier may bypass	Check pair
`12005`	Rpr s/n/a/gen/trk12.6-20.0cm	1 - modifier may bypass	Check pair
`12006`	Rpr s/n/a/gen/trk20.1-30.0cm	1 - modifier may bypass	Check pair
`12007`	Rpr s/n/ax/gen/trnk >30.0 cm	1 - modifier may bypass	Check pair
`12011`	Rpr f/e/e/n/l/m 2.5 cm/<	1 - modifier may bypass	Check pair
`12013`	Rpr f/e/e/n/l/m 2.6-5.0 cm	1 - modifier may bypass	Check pair
`12014`	Rpr f/e/e/n/l/m 5.1-7.5 cm	1 - modifier may bypass	Check pair
`12015`	Rpr f/e/e/n/l/m 7.6-12.5 cm	1 - modifier may bypass	Check pair
`12016`	Rpr fe/e/en/l/m 12.6-20.0 cm	1 - modifier may bypass	Check pair
`12017`	Rpr fe/e/en/l/m 20.1-30.0 cm	1 - modifier may bypass	Check pair

Showing 30 of 274 column 2 codes. Use the pair checker for any specific combination.

C9797 is bundled into these codes

C9797 appears as a Column 2 code in 3 active edits. Reported with one of these Column 1 codes on the same date of service, C9797 is the code that denies.

Column 1 code	Short description	Modifier indicator
`37244`	Vasc embolize/occlude bleed	1	Check pair
`61624`	Tcat perm occls/embolj cns	1	Check pair
`61626`	Tcat perm occls/embol noncns	1	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.