HCPCS code Q9966: Low-osmolar contrast, 200-299 mg iodine/ml2026 Medicare rate & RVUs in Missouri
Reports low-osmolar iodinated contrast used for diagnostic imaging when its iodine concentration is 200-299 mg per milliliter.
CMS doesn’t publish an office rate for Q9966 in Missouri.
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 Q9966 covers
Q9966 identifies low-osmolar iodinated contrast material used to make anatomy visible during diagnostic imaging, including radiographic and CT examinations. Radiology departments, hospitals, imaging centers, and other entities furnishing the contrast may report it when the product’s iodine concentration is 200-299 mg per milliliter. The code identifies the contrast material, not the imaging study or its interpretation.
CMS excludes Q9966 from the physician fee schedule under status E. When Medicare covers the item, payment is through another method; HCPCS pricing classifies it as a Part B drug, generally priced from CMS quarterly Average Sales Price drug files. The coverage code indicates that special Medicare coverage instructions apply. Each billing unit represents 1 milliliter of contrast, so the reported units correspond to the milliliters furnished.
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 Q9966 pays more and less in Missouri
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Kansas City, MO | Unavailable | Unavailable |
| Metropolitan St. Louis, MO | Unavailable | Unavailable |
| Rest of Missouri | Unavailable | Unavailable |
How the Q9966 rate is calculated
Each of Q9966’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 · Q9966
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 Q9966
Q9966 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 · Q9966
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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Q9966 isn’t priced in this setting.
Q9966 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- Q9965Iodinated contrast100–199 mg iodine/mL
- Q9965 is for low-osmolar contrast at 100-199 mg iodine/mL. Q9966 applies when the concentration is 200-299 mg/mL.
- Q9967Iodinated contrast300–399 mg iodine/mL
- Q9967 is for low-osmolar contrast at 300-399 mg iodine/mL. Use Q9966 for the 200-299 mg/mL range.
- Q9961Iodinated contrast250–299 mg iodine/mL
- Q9961 covers high-osmolar contrast at 250-299 mg iodine/mL. Q9966 is for low-osmolar contrast in the 200-299 mg/mL range.
Q9966 billing questions
How many units represent 50 mL of contrast?
Q9966 represents 1 mL per unit, so 50 mL corresponds to 50 units.
How do I choose between Q9965, Q9966, and Q9967?
Choose by the contrast material’s iodine concentration: Q9965 covers 100-199 mg/mL, Q9966 covers 200-299 mg/mL, and Q9967 covers 300-399 mg/mL.
Is Q9966 the code for the scan or interpretation?
No. It identifies the low-osmolar contrast material; the imaging study and its interpretation are distinct services.
How does Medicare treat Q9966?
CMS excludes it from the physician fee schedule under status E. When covered, it is paid through another method; HCPCS pricing identifies it as a Part B drug generally priced from quarterly ASP files.
Does Medicare coverage have a special instruction for this code?
Yes. The HCPCS coverage code indicates 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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