Who bills the most Injection, ferric carboxymaltose, 1 mg (J1439) to Medicare in Iowa?
Medicare Part B FFS · CY2024 · as published by CMS4 physician groups billed Injection, ferric carboxymaltose, 1 mg (J1439) to Medicare fee-for-service in Iowa in 2024; independent (non-hospital-affiliated) groups deliver 0%.
J1439 — Injection, ferric carboxymaltose, 1 mg · Source: CMS Medicare Physician & Other Practitioners PUF (Part B), CY2024 release. Medicare fee-for-service only.
Snapshot covers the whole Iowa market — the table below shows the top 100 groups (free tier).
Medicare fee-for-service covers 62% of Medicare in Iowa; Medicare Advantage penetration 25% → 38% since 2020.
| # | Physician group | City | St | Specialty | Providers | J1439 svcs | Share* | Phone |
|---|---|---|---|---|---|---|---|---|
| 1 | MCFARLAND CLINIC PC | AMES | IA | PHYSICIAN ASSISTANT | 352 | 242,250 | 59.3% | (515) 239-4400 |
| 2 | AMERICAN ONCOLOGY PARTNERS PA | FORT WAYNE | IA | HEMATOLOGY/ONCOLOGY | 333 | 72,750 | 17.8% | (260) 484-8830 |
| 3 | PHYSICIANS CLINIC OF IOWA PC | CEDAR RAPIDS | IA | NURSE PRACTITIONER | 132 | 62,250 | 15.2% | (319) 247-3010 |
| 4 | STATE UNIVERSITY OF IOWA | IOWA CITY | IA | PHYSICIAN ASSISTANT | 1902 | 31,500 | 7.7% | (319) 678-8201 |
*Share of Iowa's disclosed Medicare-FFS services for J1439, counted once per clinician. Volume is placed in the state it was billed from, so this page ranks the groups actually billing J1439 in Iowa — including groups registered elsewhere ("City" is each group's registered location). Group figures sum clinicians affiliated with exactly one group; clinicians in several groups are listed in each group's drill-down but not volume-attributed to any single group.
How to read this. Figures are Medicare fee-for-service only — not all-payer — from the CMS Medicare Physician & Other Practitioners Public Use File (Part B), CY2024 release. CMS suppresses any provider×code row under 11 beneficiaries, so a missing group means "suppressed," never zero. "Charges" are provider-submitted amounts, not payments. Groups are ranked by measured service volume attributed to clinicians in exactly one group — clinicians affiliated with several groups are listed in rosters but never volume-attributed to a single group — a direct read of the public record, not a rating or quality score. Full method: Methods & Sources.
Comparing against an all-payer estimate?
These are exact counts from Medicare fee-for-service claims — roughly a third to half of most procedure markets, depending on payer mix. Modeled all-payer databases project the remainder statistically; we publish the audited floor and label it as such. Same market, different denominator. How the numbers reconcile →