FeeBase
Log inGet started
Menu

HCPCS code Q9958: High-osmolar contrast, up to 149 mg/mL iodine2026 Medicare rate & RVUs

Reports each milliliter of high-osmolar iodinated contrast with an iodine concentration up to 149 mg/mL furnished for diagnostic imaging.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare rate · Q9958

High-osmolar contrast, up to 149 mg/mL iodine

Office or facility?

Work RVUs
0
Total RVUs
0.00
Global days
XXX

National rate · 2026

—

Not priced in the facility setting.

See every locality for Q9958 →Billed by an NP, PA or therapist? →

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

Your location

Medicare pays by the payment locality where the service is performed.

On this page 10 sections
  1. Medicare rate
  2. What Q9958 covers
  3. By payment locality
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Similar codes
  8. Related codes
  9. Billing questions
  10. Sources

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

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

Q9958 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailableUnavailable
AlaskaUnavailableUnavailable
ArizonaUnavailableUnavailable
ArkansasUnavailableUnavailable
Atlanta, GAUnavailableUnavailable
Austin, TXUnavailableUnavailable
Bakersfield, CAUnavailableUnavailable
Baltimore area, MDUnavailableUnavailable
Beaumont, TXUnavailableUnavailable
Brazoria, TXUnavailableUnavailable

Q9958 rates by state

Office rate range in each state. Select a state to see its payment localities.

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

Explore a state

Local rates. Clear comparisons.

Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.

View every state and territory as a table
Q9958 office rate range by state
State / territoryOffice rate rangeLocalities
AKNo published base rate1
ALNo published base rate1
ARNo published base rate1
AZNo published base rate1
CANo published base rate29
CONo published base rate1
CTNo published base rate1
DCNo published base rate1
DENo published base rate1
FLNo published base rate3
GANo published base rate2
GUNo published base rate1
HINo published base rate1
IANo published base rate1
IDNo published base rate1
ILNo published base rate4
INNo published base rate1
KSNo published base rate1
KYNo published base rate1
LANo published base rate2
MANo published base rate2
MDNo published base rate3
MENo published base rate2
MINo published base rate2
MNNo published base rate1
MONo published base rate3
MSNo published base rate1
MTNo published base rate1
NCNo published base rate1
NDNo published base rate1
NENo published base rate1
NHNo published base rate1
NJNo published base rate2
NMNo published base rate1
NVNo published base rate1
NYNo published base rate5
OHNo published base rate1
OKNo published base rate1
ORNo published base rate2
PANo published base rate2
PRNo published base rate1
RINo published base rate1
SCNo published base rate1
SDNo published base rate1
TNNo published base rate1
TXNo published base rate8
UTNo published base rate1
VANo published base rate2
VINo published base rate1
VTNo published base rate1
WANo published base rate2
WINo published base rate1
WVNo published base rate1
WYNo published base rate1

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

Office or facility?

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

—

Q9958 isn’t priced in this setting.

Q9958 compared with similar codes

Compare codes · National

4 codes, side by side

Office or facility?

  • Q9958

    High-osmolar contrast, up to 149 mg/mL iodine0 wRVU

    Not priced

  • Q9959

    High-osmolar contrast, 150–199 mg iodine/ml0 wRVU

    Not priced

  • Q9960

    Iodinated contrast, high osmolar, 200–249 mg/mL0 wRVU

    Not priced

  • Q9965

    Iodinated contrast, 100–199 mg iodine/mL0 wRVU

    Not priced

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.

Codes related to Q9958

Related codes aren’t interchangeable: bill the code that matches the service performed.

Codes related to Q9958
CodeHow it relatesNational office range
Same family
Q9959High-osmolar contrast, 150–199 mg iodine/mlHigh-osmolar contrast with iodine concentration of 150–199 mg/mL.No office rate
Q9960Iodinated contrast, high osmolar, 200–249 mg/mLHigh-osmolar contrast with iodine concentration of 200–249 mg/mL.No office rate
Q9964Iodinated contrast, high osmolar, 400+ mg/mLHigh-osmolar contrast with iodine concentration of 400 mg/mL or greater.No office rate
Used instead
Q9965Iodinated contrast, 100–199 mg iodine/mLLow-osmolar contrast with iodine concentration of 100–199 mg/mL.No office rate

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

Open CMS sourceHow we calculate rates

Did this answer your question about what Q9958 pays?

Tell us what you were actually trying to work out. We’ll answer you directly, or build the page that does.

Fee sheets · Coming soon

Put Q9958 and the rest of your codes on one sheet

Your codes at your locality, with payer contracts beside Medicare.

Join the waitlist