HCPCS code Q9958: High-osmolar contrast, up to 149 mg/mL iodine2026 Medicare rate & RVUs in Texas
Reports each milliliter of high-osmolar iodinated contrast with an iodine concentration up to 149 mg/mL furnished for diagnostic imaging.
CMS doesn’t publish an office rate for Q9958 in Texas.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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What Q9958 covers
Q9958 identifies high-osmolar iodinated contrast material with an iodine concentration no greater than 149 mg/mL. The material is used to enhance radiographic images; the code distinguishes this concentration band from other high-osmolar products and from low-osmolar contrast. Imaging providers report the contrast material furnished for diagnostic imaging. Selection depends on both the high-osmolar classification and iodine concentration.
One HCPCS unit represents 1 mL. Report one unit for each milliliter of material. CMS assigns physician fee schedule status E, excluding the item from that schedule by regulation. When Medicare covers the item, payment is made under another payment method. HCPCS pricing classifies it as a Part B drug; when covered, Medicare generally pays from CMS's quarterly ASP drug pricing files. CMS's coverage code signals that special Medicare coverage instructions apply.
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
Where Q9958 pays more and less in Texas
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
8 of 8 payment localities
| Payment locality | Office | Facility |
|---|---|---|
| Austin, TX | Unavailable | Unavailable |
| Beaumont, TX | Unavailable | Unavailable |
| Brazoria, TX | Unavailable | Unavailable |
| Dallas, TX | Unavailable | Unavailable |
| Fort Worth, TX | Unavailable | Unavailable |
| Galveston, TX | Unavailable | Unavailable |
| Houston, TX | Unavailable | Unavailable |
| Rest of Texas | Unavailable | Unavailable |
How the Q9958 rate is calculated
Each of Q9958’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · Q9958
RVUs × geographic indexes × conversion factor
Work0.00
0.00 RVUs× 1.000 GPCI
Practice expense0.00
0.00 RVUs× 1.000 GPCI
Malpractice0.00
0.00 RVUs× 1.000 GPCI
Adjusted RVUs
0.0000
Conversion factor
$33.4009
Medicare rate
$0.00
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for Q9958
Q9958 has no global surgery period, no multiple-procedure, bilateral or assistant-at-surgery adjustment, and no professional/technical split. What changes the payment is where the service happens: the place of service on the claim decides whether Medicare pays the office or the facility rate.
Place of service · Q9958
Which rate does Medicare pay?
The POS code on the claim line (CMS-1500 box 24B).
POS 11 · non-facility rate · national
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Q9958 isn’t priced in this setting.
Q9958 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- Q9959High-osmolar contrast150–199 mg iodine/ml
- Both identify high-osmolar contrast, but Q9958 covers concentrations up to 149 mg/mL and Q9959 covers 150–199 mg/mL.
- Q9960Iodinated contrastHigh osmolar, 200–249 mg/mL
- Q9960 is for high-osmolar contrast at 200–249 mg/mL; Q9958 is for concentrations up to 149 mg/mL.
- Q9965Iodinated contrast100–199 mg iodine/mL
- Q9965 identifies low-osmolar contrast at 100–199 mg/mL. Q9958 identifies high-osmolar contrast at concentrations up to 149 mg/mL.
Q9958 billing questions
When should Q9958 be selected instead of Q9959?
Use Q9958 for high-osmolar contrast with an iodine concentration up to 149 mg/mL. Q9959 is for high-osmolar contrast at 150–199 mg/mL.
How many units should be reported?
Each unit represents 1 mL. Report one unit for each milliliter of contrast material furnished.
Does Q9958 represent low-osmolar contrast?
No. Q9958 identifies high-osmolar contrast; low-osmolar contrast is represented by a different code family, such as Q9965 for 100–199 mg/mL.
How does Medicare treat Q9958?
CMS assigns status E, excluding it from the physician fee schedule by regulation. When covered, Medicare pays under another payment method; HCPCS pricing identifies it as a Part B drug generally priced from quarterly ASP files.
What coverage status does CMS assign?
CMS assigns a coverage code indicating that special Medicare coverage instructions apply.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
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