Q9958 Hocm <=149 mg/ml iodine, 1ml
What Q9958 is
High osmolar contrast material, up to 149 mg/ml iodine concentration, per ml
HCPCS Level II long description, CMS October 2026 file. See the Q codes page for the full section.
Medicare payment for Q9958 (CY2026)
This code has no Physician Fee Schedule rate: Excluded from the Physician Fee Schedule (paid under another system or not priced here). It may be paid under a different fee schedule (clinical laboratory, DMEPOS, anesthesia) or not paid at all - check the relevant CMS schedule.
Medically Unlikely Edit (MUE)
Medicare caps Q9958 at 300 units per date of service for practitioner claims (MAI 3 - date of service edit (clinical): units above the MUE may pay with documentation on appeal), rationale: Prescribing Information. Units above the cap are denied unless the edit's adjudication rules allow an appeal with documentation.
Billed with Q9958? These codes are bundled into it
Q9958 is a Column 1 code in 6 active NCCI PTP edits. When one of these Column 2 codes is reported on the same date of service, it is denied as bundled - unless the edit's modifier indicator is 1 and documentation supports a distinct service with an NCCI-associated modifier.
| Column 2 code | Short description | Modifier indicator | |
|---|---|---|---|
Q9951 | Locm >= 400 mg/ml iodine,1ml | 0 - no modifier bypass | Check pair |
Q9959 | Hocm 150-199mg/ml iodine,1ml | 0 - no modifier bypass | Check pair |
Q9964 | Hocm>= 400mg/ml iodine, 1ml | 0 - no modifier bypass | Check pair |
Q9965 | Locm 100-199mg/ml iodine,1ml | 1 - modifier may bypass | Check pair |
Q9966 | Locm 200-299mg/ml iodine,1ml | 1 - modifier may bypass | Check pair |
Q9967 | Locm 300-399mg/ml iodine,1ml | 1 - modifier may bypass | Check pair |
Q9958 is bundled into these codes
Q9958 appears as a Column 2 code in 4 active edits. Reported with one of these Column 1 codes on the same date of service, Q9958 is the code that denies.
| Column 1 code | Short description | Modifier indicator | |
|---|---|---|---|
Q9960 | Hocm 200-249mg/ml iodine,1ml | 1 | Check pair |
Q9961 | Hocm 250-299mg/ml iodine,1ml | 1 | Check pair |
Q9962 | Hocm 300-349mg/ml iodine,1ml | 1 | Check pair |
Q9963 | Hocm 350-399mg/ml iodine,1ml | 1 | Check pair |
Data: CMS CY2026 Physician Fee Schedule RVU file (October release, RVU26D) and Medicare NCCI PTP practitioner edits v32.3 (2026 Q4). Verify against the official files before billing or contracting decisions.