C9507: Plasma, high titer covid-19 convalescent, each unit
C9507 is a HCPCS Level II code for plasma, high titer covid-19 convalescent, each unit. It belongs to the Outpatient Prospective Payment System section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Special coverage instructions apply
There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q4-Oct. This states Medicare’s position on the code, not on your particular claim.
Medically Unlikely Edits: units per day
The most units of C9507 Medicare will pay on one date of service. Bill more on a single line and it is denied. The limit is not the same in every setting, so the row that matters is the one matching the claim you are building.
- practitioner
- 2 units MAI 3: Date of Service Edit: Clinical · Code Descriptor / CPT Instruction
- outpatient
- 2 units MAI 3: Date of Service Edit: Clinical · Code Descriptor / CPT Instruction
The adjudication indicator decides whether exceeding the limit is worth appealing at all: MAI 1 is a line edit you can support with documentation, MAI 3 is a date-of-service edit that is also appealable, and MAI 2 is absolute, no documentation overrides it. CMS MUE 2026Q4.
The CMS record for C9507
- Long descriptor
- Plasma, high titer covid-19 convalescent, each unit
- Short descriptor
- Covid-19 convalescent plasma
- Added
- December 28, 2021
- BETOS
- T1H
- Pricing indicator
- 53: Other
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service: CMS's own analytic grouping.
Statute.
Codes adjacent to C9507
HCPCS has no hierarchy: related items simply sit next to each other in the numbering. If C9507 is not quite right, the correct code is very often within a few positions of it.
- C9488Injection, conivaptan hydrochloride, 1 mg
- C9489Injection, nusinersen, 0.1 mgterminated
- C9490Injection, bezlotoxumab, 10 mgterminated
- C9491Injection, avelumab, 10 mgterminated
- C9492Injection, durvalumab, 10 mgterminated
- C9493Injection, edaravone, 1 mgterminated
- C9494Injection, ocrelizumab, 1 mgterminated
- C9497Loxapine, inhalation powder, 10 mgterminated
- C9600Percutaneous transcatheter placement of drug eluting intracoronary stent(s), with coronary angioplasty when performed; single major coronary artery or branch
- C9601Percutaneous transcatheter placement of drug-eluting intracoronary stent(s), with coronary angioplasty when performed; each additional branch of a major coronary artery (list separately in addition to code for primary procedure)
- C9602Percutaneous transluminal coronary atherectomy, with drug eluting intracoronary stent, with coronary angioplasty when performed; single major coronary artery or branch
- C9603Percutaneous transluminal coronary atherectomy, with drug-eluting intracoronary stent, with coronary angioplasty when performed; each additional branch of a major coronary artery (list separately in addition to code for primary procedure)
- C9604Percutaneous transluminal revascularization of or through coronary artery bypass graft (internal mammary, free arterial, venous), any combination of drug-eluting intracoronary stent, atherectomy and angioplasty, including distal protection when performed; single vessel
- C9605Percutaneous transluminal revascularization of or through coronary artery bypass graft (internal mammary, free arterial, venous), any combination of drug-eluting intracoronary stent, atherectomy and angioplasty, including distal protection when performed; each additional branch subtended by the bypass graft (list separately in addition to code for primary procedure)
- C9606Percutaneous transluminal revascularization of acute total/subtotal occlusion during acute myocardial infarction, coronary artery or coronary artery bypass graft, any combination of drug-eluting intracoronary stent, atherectomy and angioplasty, including aspiration thrombectomy when performed, single vessel
- C9607Percutaneous transluminal revascularization of chronic total occlusion, coronary artery, coronary artery branch, or coronary artery bypass graft, any combination of drug-eluting intracoronary stent, atherectomy and angioplasty; single vessel