Q9958 HCPCS code: High osmolar contrast material, up to 149 mg/ml iodine concentration, per ml
Q9958 is the HCPCS Level II code for high osmolar contrast material, up to 149 mg/ml iodine concentration, per ml. In 2024 Medicare paid an average of $0.06 per service for Q9958 across 127,612 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 600 per day on outpatient hospital claims. Medicare volume fell 11% from 2022 to 2024 (143,530 to 127,612 services). In 2024, about 238 clinicians billed Medicare for Q9958 for 695 beneficiaries; Texas, Virginia, California accounted for 61% of services.
Code details
| Field | Value |
|---|---|
| Section | Q codes — Temporary codes |
| Coverage code | D — Special coverage instructions apply |
| Pricing indicator | 51 — Drug or biological (priced per ASP/average sales price rules) |
| BETOS category | I1E |
| Added | 2005-07-01 |
| Last action effective | 2005-07-01 |
Who bills Q9958 (2024)
| Measure | Value |
|---|---|
| Clinicians billing (by place of service) | 238 |
| Medicare beneficiaries | 695 |
| States with claims | 13 |
| Share of services in top 3 states (Texas, Virginia, California) | 61% |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for Q9958, 2022–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2022 | 143,530 | 793 | $0.07 | $0.06 |
| 2023 | 137,873 | 727 | $0.07 | $0.06 |
| 2024 | 127,612 | 695 | $0.07 | $0.06 |
States with the most Q9958 services (2024)
| State | Services | Avg. paid |
|---|---|---|
| Texas | 28,786 | $0.06 |
| Virginia | 25,295 | $0.06 |
| California | 16,286 | $0.06 |
| Louisiana | 10,551 | $0.06 |
| Ohio | 7,396 | $0.06 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 600 | Clinical: Data |
| practitioner claims | 300 | Prescribing Information |
What changed for Q9958
- 2005-07-01: Q9958 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 Q9958?
Q9958 is the HCPCS Level II code for high osmolar contrast material, up to 149 mg/ml iodine concentration, per ml. Short descriptor: "Hocm <=149 mg/ml iodine, 1ml".
How much does Medicare pay for Q9958?
In 2024, the average Medicare payment was $0.06 per service (average allowed $0.07).
Does Medicare cover Q9958?
Coverage code D — Special coverage instructions apply. Medicare covers it when its national or local coverage criteria are met.
How many units of Q9958 can be billed per day?
600 on outpatient hospital claims; 300 on practitioner claims (NCCI medically unlikely edits).
Related Q99 codes
- Q9950 — Injection, sulfur hexafluoride lipid microspheres, per ml
- Q9951 — Low osmolar contrast material, 400 or greater mg/ml iodine concentration, per ml
- Q9953 — Injection, iron-based magnetic resonance contrast agent, per ml
- Q9954 — Oral magnetic resonance contrast agent, per 100 ml
- Q9955 — Injection, perflexane lipid microspheres, per ml
- Q9956 — Injection, octafluoropropane microspheres, per ml
- Q9957 — Injection, perflutren lipid microspheres, per ml
- Q9959 — High osmolar contrast material, 150-199 mg/ml iodine concentration, per ml
- Q9960 — High osmolar contrast material, 200-249 mg/ml iodine concentration, per ml
- Q9961 — High osmolar contrast material, 250-299 mg/ml iodine concentration, per ml
- Q9962 — High osmolar contrast material, 300-349 mg/ml iodine concentration, per ml
- Q9963 — High osmolar contrast material, 350-399 mg/ml iodine concentration, per ml
Building a device that would bill under a code like this? Caduvo matches a device description to HCPCS/CPT codes, Medicare coverage and payment, and the FDA pathway in one report.
Next steps
- Run a reimbursement report for a device billed under Q9958
- Watch Q9958 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for Q9958
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.