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

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, 2026One payment locality

CMS doesn’t publish a rate for Q9958 in Montana.

Separate payment rules applyOffice (non-facility)
Separate payment rules applyHospital or facility

Check a contract rate as a % of Medicare · Q9958 nationwide

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

We’ll open Q9958 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Montana
  2. What Q9958 covers
  3. Compared with other areas
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Related codes
  8. Rate history
  9. Where it applies
  10. Billing questions
  11. 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.

How Montana compares for Q9958

Q9958 in Montana vs other payment areas
  1. Montana · this pageUnavailable
  2. Los Angeles, CA · CaliforniaUnavailable
  3. Washington, DC area · District of ColumbiaUnavailable
  4. Miami, FL · FloridaUnavailable
  5. Chicago, IL · IllinoisUnavailable
  6. Manhattan, NY · New YorkUnavailable
  7. Alaska · AlaskaUnavailable

Other areas in Montana first, then benchmark localities. Bars start at $0.

Every other payment area

Q9958 in every other Medicare payment locality
Payment localityOfficeFacility
AlabamaAlabama——
ArkansasArkansas——
ArizonaArizona——
Bakersfield, CACalifornia——
Chico, CACalifornia——
El Centro, CACalifornia——
Fresno, CACalifornia——
Hanford, CACalifornia——

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

See Q9958 in every payment locality

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.

Codes related to Q9958

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

Codes related to Q9958
CodeHow it relatesOffice range, Montana
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

How Q9958 has changed in Montana

Q9958 · Office / nonfacility

Rate unavailable

Effective 2026-10-01

A rate is unavailable in one of these releases, so a change cannot be calculated.

Base rate by release · bars start at $0 · select a bar to compare

One bar per available release, ordered by effective date. Missing rates remain gaps. These comparisons hold the code, setting and locality identifiers constant; they do not isolate which policy or input caused a change.

What changed, release by release
Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01Separate payment rules applySeparate payment rules applyRVU26D
2026-07-01Separate payment rules applySeparate payment rules applyRVU26C
2026-04-01Separate payment rules applySeparate payment rules applyRVU26B
2026-01-01Separate payment rules applySeparate payment rules applyRVU26A
2025-10-01Separate payment rules applySeparate payment rules applyRVU25D
2025-07-01Separate payment rules applySeparate payment rules applyRVU25C
2025-04-01Separate payment rules applySeparate payment rules applyRVU25B
2025-01-01Separate payment rules applySeparate payment rules applyRVU25A
2024-10-01Separate payment rules applySeparate payment rules applyRVU24D
2024-07-01Separate payment rules applySeparate payment rules applyRVU24C
2024-04-01Separate payment rules applySeparate payment rules applyRVU24B
2024-03-09Separate payment rules applySeparate payment rules applyRVU24AR
2024-01-01Separate payment rules applySeparate payment rules applyRVU24A
2023-10-01Separate payment rules applySeparate payment rules applyRVU23D
2023-07-01Separate payment rules applySeparate payment rules applyRVU23C
2023-04-01Separate payment rules applySeparate payment rules applyRVU23B
2023-01-01Separate payment rules applySeparate payment rules applyRVU23A
2022-10-01Separate payment rules applySeparate payment rules applyRVU22D
2022-07-01Separate payment rules applySeparate payment rules applyRVU22C
2022-04-01Separate payment rules applySeparate payment rules applyRVU22B
2022-01-01Separate payment rules applySeparate payment rules applyRVU22A
2021-10-01Separate payment rules applySeparate payment rules applyRVU21D
2021-07-01Separate payment rules applySeparate payment rules applyRVU21C
2021-04-01Separate payment rules applySeparate payment rules applyRVU21B
2021-01-01Separate payment rules applySeparate payment rules applyRVU21A
2020-10-01Separate payment rules applySeparate payment rules applyRVU20D
2020-07-01Separate payment rules applySeparate payment rules applyRVU20C
2020-04-01Separate payment rules applySeparate payment rules applyRVU20B
2020-01-01Separate payment rules applySeparate payment rules applyRVU20A
2019-10-01Separate payment rules applySeparate payment rules applyRVU19D
2019-07-01Separate payment rules applySeparate payment rules applyRVU19C
2019-04-01Separate payment rules applySeparate payment rules applyRVU19B
2019-01-01Separate payment rules applySeparate payment rules applyRVU19A
2018-10-01Separate payment rules applySeparate payment rules applyRVU18D
2018-07-01Separate payment rules applySeparate payment rules applyRVU18C
2018-04-01Separate payment rules applySeparate payment rules applyRVU18B
2018-01-01Separate payment rules applySeparate payment rules applyRVU18AR1
2017-10-01Separate payment rules applySeparate payment rules applyRVU17D
2017-07-01Separate payment rules applySeparate payment rules applyRVU17C
2017-04-01Separate payment rules applySeparate payment rules applyRVU17B
2017-01-01Separate payment rules applySeparate payment rules applyRVU17A
2016-10-01Separate payment rules applySeparate payment rules applyRVU16D
2016-07-01Separate payment rules applySeparate payment rules applyRVU16C
2016-04-01Separate payment rules applySeparate payment rules applyRVU16B
2016-01-01Separate payment rules applySeparate payment rules applyRVU16A
2015-10-01Separate payment rules applySeparate payment rules applyRVU15D
2015-07-01Separate payment rules applySeparate payment rules applyRVU15C
2015-04-01Separate payment rules applySeparate payment rules applyRVU15B
2015-01-01Separate payment rules applySeparate payment rules applyRVU15A
2014-10-01Separate payment rules applySeparate payment rules applyRVU14D
2014-07-01Separate payment rules applySeparate payment rules applyRVU14C
2014-04-01Separate payment rules applySeparate payment rules applyRVU14B
2014-01-01Separate payment rules applySeparate payment rules applyRVU14A
2013-10-01Separate payment rules applySeparate payment rules applyRVU13D
2013-07-01Separate payment rules applySeparate payment rules applyRVU13C
2013-04-01Separate payment rules applySeparate payment rules applyRVU13B
2013-01-01Separate payment rules applySeparate payment rules applyRVU13AR

Price Q9958 for an earlier date of service

Where the Montana rate applies

Montana is a Medicare payment area, not a city. Our Census mapping connects it to 497 cities and communities in Montana. Some span more than one payment area; confirm with the service ZIP.

  • Absarokee
  • Acton
  • Alberton
  • Alder
  • Alzada
  • Amsterdam
  • Anaconda-Deer Lodge County
  • Antelope

Browse all communities in Montana

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

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