Who bills the most Injection, darbepoetin alfa, 1 microgram (non-esrd use) (J0881) to Medicare in Illinois?
Medicare Part B FFS · CY2024 · as published by CMS13 physician groups billed Injection, darbepoetin alfa, 1 microgram (non-esrd use) (J0881) to Medicare fee-for-service in Illinois in 2024; the top five named groups hold 90% of that volume, and independent (non-hospital-affiliated) groups deliver 0%.
J0881 — Injection, darbepoetin alfa, 1 microgram (non-esrd use) · Source: CMS Medicare Physician & Other Practitioners PUF (Part B), CY2024 release. Medicare fee-for-service only.
Snapshot covers the whole Illinois market — the table below shows the top 100 groups (free tier).
Medicare fee-for-service covers 57% of Medicare in Illinois; Medicare Advantage penetration 30% → 43% since 2020.
| # | Physician group | City | St | Specialty | Providers | J0881 svcs | Share* | Phone |
|---|---|---|---|---|---|---|---|---|
| 1 | ILLINOIS CANCER SPECIALISTS | ARLINGTON HEIGHTS | IL | HEMATOLOGY/ONCOLOGY | 29 | 276,415 | 28.9% | (847) 259-4482 |
| 2 | AFFILIATED ONCOLOGISTS LLC | OAK LAWN | IL | PHYSICIAN ASSISTANT | 40 | 140,865 | 14.7% | (708) 684-5475 |
| 3 | NORTHWEST ONCOLOGY AND HEMATOLOGY SC | ROLLING MEADOWS | IL | HEMATOLOGY/ONCOLOGY | 22 | 140,827 | 14.7% | (847) 870-4100 |
| 4 | ONCOLOGY-HEMATOLOGY ASSOCIATES OF CENTRAL ILLINOIS P C | PEORIA | IL | NURSE PRACTITIONER | 62 | 120,965 | 12.6% | (309) 243-3000 |
| 5 | DUPAGE MEDICAL GROUP LTD | GLEN ELLYN | IL | PHYSICIAN ASSISTANT | 1323 | 44,900 | 4.7% | (630) 469-9200 |
| 6 | NORTHWESTERN MEDICAL FACULTY FOUNDATION | CHICAGO | IL | NURSE PRACTITIONER | 4339 | 29,180 | 3.0% | — |
| 7 | SPRINGFIELD CLINIC, LLP | SPRINGFIELD | IL | NURSE PRACTITIONER | 686 | 12,840 | 1.3% | (217) 544-6464 |
| 8 | CHRISTIE CLINIC, PLLC | CHAMPAIGN | IL | INTERNAL MEDICINE | 220 | 10,400 | 1.1% | (217) 366-1200 |
| 9 | MAYO CLINIC JACKSONVILLE | JACKSONVILLE | IL | NURSE PRACTITIONER | 1587 | 8,085 | 0.8% | (904) 953-2000 |
| 10 | ADVOCATE HEALTH AND HOSPITALS CORPORATION | BUFFALO GROVE | IL | NURSE PRACTITIONER | 3045 | 6,145 | 0.6% | (847) 459-1160 |
| 11 | QUINCY PHYSICIANS AND SURGEONS CLINIC, PLLC | QUINCY | IL | NURSE PRACTITIONER | 230 | 5,800 | 0.6% | — |
| 12 | OSF MULTI-SPECIALTY GROUP | PEORIA | IL | NURSE PRACTITIONER | 2091 | 5,610 | 0.6% | (309) 683-5050 |
| 13 | RNA OF ROCKFORD, PLLC | ROCKFORD | IL | NEPHROLOGY | 18 | 3,281 | 0.3% | (815) 227-8300 |
*Share of Illinois's disclosed Medicare-FFS services for J0881, counted once per clinician. Volume is placed in the state it was billed from, so this page ranks the groups actually billing J0881 in Illinois — 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 →