C9789 HCPCS code: Instillation of anti-neoplastic pharmacologic/biologic agent into renal pelvis, any method, including all imaging guidance, including volumetric measurement if performed
C9789 is the HCPCS Level II code for instillation of anti-neoplastic pharmacologic/biologic agent into renal pelvis, any method, including all imaging guidance, including volumetric measurement if performed. In 2024 Medicare paid an average of $847.50 per service for C9789 across 164 services. Its Medicare coverage code is D (Special coverage instructions apply): Medicare covers it when its national or local coverage criteria are met. The NCCI unit limit is 1 per day on outpatient hospital claims. In 2024, about 20 clinicians billed Medicare for C9789 for 37 beneficiaries.
Code details
| Field | Value |
|---|---|
| Section | C codes — Outpatient PPS (hospital outpatient temporary codes) |
| Coverage code | D — Special coverage instructions apply |
| Pricing indicator | 53 |
| BETOS category | P5E |
| Added | 2023-10-01 |
| Last action effective | 2023-10-01 |
Who bills C9789 (2024)
| Measure | Value |
|---|---|
| Clinicians billing (by place of service) | 20 |
| Medicare beneficiaries | 37 |
| States with claims | 0 |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for C9789, 2024–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2024 | 164 | 37 | $1,065.75 | $847.50 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 1 | Code Descriptor / CPT Instruction |
| practitioner claims | 1 | Code Descriptor / CPT Instruction |
What changed for C9789
- 2023-10-01: C9789 added to HCPCS Level II
- Next scheduled CMS quarterly update (HCPCS and DMEPOS fee schedule): 2027-01-01
Frequently asked questions
What is HCPCS code C9789?
C9789 is the HCPCS Level II code for instillation of anti-neoplastic pharmacologic/biologic agent into renal pelvis, any method, including all imaging guidance, including volumetric measurement if performed. Short descriptor: "Instill pharm renal pelvis".
How much does Medicare pay for C9789?
In 2024, the average Medicare payment was $847.50 per service (average allowed $1,065.75).
Does Medicare cover C9789?
Coverage code D — Special coverage instructions apply. Medicare covers it when its national or local coverage criteria are met.
How many units of C9789 can be billed per day?
1 on outpatient hospital claims; 1 on practitioner claims (NCCI medically unlikely edits).
Related C97 codes
- C9724 — Endoscopic full-thickness plication of the stomach using endoscopic plication system (eps); includes endoscopy
- C9725 — Placement of endorectal intracavitary applicator for high intensity brachytherapy
- C9726 — Placement and removal (if performed) of applicator into breast for intraoperative radiation therapy, add-on to primary breast procedure
- C9727 — Insertion of implants into the soft palate; minimum of three implants
- C9728 — Placement of interstitial device(s) for radiation therapy/surgery guidance (e.g., fiducial markers, dosimeter), for other than the following sites (any approach): abdomen, pelvis, prostate, retroperitoneum, thorax, single or multiple
- C9733 — Non-ophthalmic fluorescent vascular angiography
- C9734 — Focused ultrasound ablation/therapeutic intervention, other than uterine leiomyomata, with magnetic resonance (mr) guidance
- C9735 — Anoscopy; with directed submucosal injection(s), any substance
- C9737 — Laparoscopy, surgical, esophageal sphincter augmentation with device (e.g., magnetic band)
- C9738 — Adjunctive blue light cystoscopy with fluorescent imaging agent (list separately in addition to code for primary procedure)
- C9739 — Cystourethroscopy, with insertion of transprostatic implant; 1 to 3 implants
- C9740 — Cystourethroscopy, with insertion of transprostatic implant; 4 or more implants
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Next steps
- Run a reimbursement report for a device billed under C9789
- Watch C9789 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for C9789
Sources: CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule; CMS NCCI MUE tables; CMS Medicare utilization (physician and DME supplier files); CMS Medicare Coverage Database articles. Fees are Medicare allowables, not commercial rates. Not billing or legal advice.