C9145 HCPCS code: Injection, aprepitant, (aponvie), 1 mg
C9145 is the HCPCS Level II code for injection, aprepitant, (aponvie), 1 mg. In 2024 Medicare paid an average of $1.42 per service for C9145 across 9,299 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 150 per day on outpatient hospital claims. Medicare volume rose 153% from 2023 to 2024 (3,682 to 9,299 services). In 2024, about 22 clinicians billed Medicare for C9145 for 285 beneficiaries; New Mexico, South Carolina, Iowa accounted for 78% of services.
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 | O1E — Other drugs |
| Added | 2023-04-01 |
| Last action effective | 2023-04-01 |
Who bills C9145 (2024)
| Measure | Value |
|---|---|
| Clinicians billing (by place of service) | 22 |
| Medicare beneficiaries | 285 |
| States with claims | 6 |
| Share of services in top 3 states (New Mexico, South Carolina, Iowa) | 78% |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for C9145, 2023–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2023 | 3,682 | 115 | $1.79 | $1.43 |
| 2024 | 9,299 | 285 | $1.78 | $1.42 |
States with the most C9145 services (2024)
| State | Services | Avg. paid |
|---|---|---|
| New Mexico | 2,980 | $1.39 |
| South Carolina | 2,204 | $1.46 |
| Iowa | 1,672 | $1.40 |
| Illinois | 897 | $1.36 |
| Alaska | 680 | $1.47 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 150 | Prescribing Information |
| practitioner claims | 150 | Prescribing Information |
What changed for C9145
- 2023-04-01: C9145 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 C9145?
C9145 is the HCPCS Level II code for injection, aprepitant, (aponvie), 1 mg. Short descriptor: "Inj, aponvie, 1 mg".
How much does Medicare pay for C9145?
In 2024, the average Medicare payment was $1.42 per service (average allowed $1.78).
Does Medicare cover C9145?
Coverage code D — Special coverage instructions apply. Medicare covers it when its national or local coverage criteria are met.
How many units of C9145 can be billed per day?
150 on outpatient hospital claims; 150 on practitioner claims (NCCI medically unlikely edits).
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Next steps
- Run a reimbursement report for a device billed under C9145
- Watch C9145 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for C9145
Sources: CMS HCPCS Level II release October 2025; 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.