MCMCB Pro
C9794

C9794Therapeutic radiology simulation-aided field setting; complex, including acquisition of pet and ct imaging data required for radiopharmaceutical-directed radiation therapy treatment planning (i.e., modeling)

HCPCSTerminatedBETOS P7A

C9794 is a HCPCS Level II code for therapeutic radiology simulation-aided field setting; complex, including acquisition of pet and ct imaging data required for radiopharmaceutical-directed radiation therapy treatment planning (i.e., modeling). It belongs to the Outpatient Prospective Payment System section. It was terminated on December 31, 2024 and is not valid on new claims.

This code has been terminated

CMS terminated C9794 on December 31, 2024. It stays in the file as history — a claim you are auditing from before that date may legitimately carry it — but it must not appear on a new claim. The adjacent codes below are the usual place to look for its replacement.

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 2026Q3-Jul. This states Medicare’s position on the code, not on your particular claim.

The CMS record for C9794

Long descriptor
Therapeutic radiology simulation-aided field setting; complex, including acquisition of pet and ct imaging data required for radiopharmaceutical-directed radiation therapy treatment planning (i.e., modeling)

The official wording. This is what the code means.

Short descriptor
Complex simulation w/pet-ct

CMS's 28-character form, which is what shows up on a remittance advice.

Added
January 1, 2024

When CMS introduced the code.

Terminated
December 31, 2024

When CMS retired it.

BETOS
P7A

Berenson-Eggers Type of Service — CMS's own analytic grouping.

Pricing indicator
53 — Other

Statute.

Codes adjacent to C9794

HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If C9794 is not quite right, the correct code is very often within a few positions of it.

  • C9786Echocardiography image post processing for computer aided detection of heart failure with preserved ejection fraction, including interpretation and reportterminated
  • C9787Gastric electrophysiology mapping with simultaneous patient symptom profilingterminated
  • C9788Opto-acoustic imaging, breast (including axilla when performed), unilateral, with image documentation, analysis and report, obtained with ultrasound examinationterminated
  • C9789Instillation of anti-neoplastic pharmacologic/biologic agent into renal pelvis, any method, including all imaging guidance, including volumetric measurement if performed
  • C9790Histotripsy (i.e., non-thermal ablation via acoustic energy delivery) of malignant renal tissue, including image guidanceterminated
  • C9791Magnetic resonance imaging with inhaled hyperpolarized xenon-129 contrast agent, chest, including preparation and administration of agent
  • C9792Blinded or nonblinded procedure for symptomatic new york heart association (nyha) class ii, iii, iva heart failure; transcatheter implantation of left atrial to coronary sinus shunt using jugular vein access, including all imaging necessary to intra procedurally map the coronary sinus for optimal shunt placement (e.g., tee or ice ultrasound, fluoroscopy), performed under general anesthesia in an approved investigational device exemption (ide) study)
  • C97933d predictive model generation for pre-planning of a cardiac procedure, using data from cardiac computed tomographic angiography and/or magnetic resonance imaging with report
  • C9795Stereotactic body radiation therapy, treatment delivery, per fraction to 1 or more lesions, including image guidance and real-time positron emissions-based delivery adjustments to 1 or more lesions, entire course not to exceed 5 fractionsterminated
  • C9796Repair of enterocutaneous fistula small intestine or colon (excluding anorectal fistula) with plug (e.g., porcine small intestine submucosa [sis])
  • C9797Vascular embolization or occlusion procedure with use of a pressure-generating catheter (e.g., one-way valve, intermittently occluding), inclusive of all radiological supervision and interpretation, intraprocedural roadmapping, and imaging guidance necessary to complete the intervention; for tumors, organ ischemia, or infarction
  • C9800Dermal injection procedure(s) for facial lipodystrophy syndrome (lds) and provision of radiesse or sculptra dermal filler, including all items and suppliesterminated
  • C9803Hospital outpatient clinic visit specimen collection for severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), any specimen sourceterminated
  • C9804Elastomeric infusion pump (e.g., on-q* pump with bolus), including catheter and all disposable system components, non-opioid medical device (must be a qualifying medicare non-opioid medical device for post-surgical pain relief in accordance with section 4135 of the caa, 2023)
  • C9806Rotary peristaltic infusion pump (e.g., ambit pump), including catheter and all disposable system components, non-opioid medical device (must be a qualifying medicare non-opioid medical device for post-surgical pain relief in accordance with section 4135 of the caa, 2023)
  • C9807Nerve stimulator, percutaneous, peripheral (e.g., sprint peripheral nerve stimulation system), including electrode and all disposable system components, non-opioid medical device (must be a qualifying medicare non-opioid medical device for post-surgical pain relief in accordance with section 4135 of the caa, 2023)

Questions about C9794

What is HCPCS code C9794?

C9794 is a HCPCS Level II code for therapeutic radiology simulation-aided field setting; complex, including acquisition of pet and ct imaging data required for radiopharmaceutical-directed radiation therapy treatment planning (i.e., modeling). It sits in the Outpatient Prospective Payment System section.

Does Medicare cover C9794?

The CMS HCPCS file marks C9794 as "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.

Is C9794 still valid?

No. C9794 was terminated on December 31, 2024 and should not be used on new claims.

HCPCS Level II2026Q3-Jul· effective July 1, 2026