St. John Macomb Oakland Hospital-Warren Campus
Warren, Michigan 48093
Data last updated: 2026-02-18
Estimates assume 20% coinsurance after deductible. Actual costs depend on your plan's negotiated rates, coinsurance, and out-of-pocket maximum. .
Your Insurance Plan
St. John Macomb Oakland Hospital-Warren Campus in Warren, Michigan receives a BillKarma billing grade of F based on an average markup of 10.8x Medicare rates across 12 procedures in their published price transparency file. This places it in the top 25 most expensive hospitals in Michigan by markup ratio. The highest individual markups are for Arthrd pst tq 1ntrspc lum (20.1x Medicare) and Cervical Spine Fusion (19.1x Medicare). Patients with scheduled procedures at this hospital should review costs and compare nearby alternatives before confirming — charges at D and F grade hospitals are significantly above the national average.
Billing Profile
Last updated: 2026-02-20
Cash discount data sourced from hospital price transparency files. "Not reported" means the hospital did not include this in their posted file.
Billing Grade Position
This hospital is currently graded F based on markup vs Medicare.
Common Procedure Prices
Last updated: 2026-02-18
| CPT | Description | Hospital | Medicare | Markup |
|---|---|---|---|---|
| 22630 | Arthrd pst tq 1ntrspc lum | $30419.73 | $1510.72 | 20.1x |
| 22551 | Cervical Spine Fusion | $30698.61 | $1604.91 | 19.1x |
| 27130 | Total Hip Replacement | $20125.00 | $1162.02 | 17.3x |
| 27447 | Total Knee Replacement | $19625.00 | $1159.35 | 16.9x |
| 23472 | Shoulder Replacement | $19312.50 | $1300.30 | 14.9x |
| 11042 | Wound Debridement | $605.39 | $55.78 | 10.9x |
| 29881 | Knee Arthroscopy | $5285.57 | $515.71 | 10.2x |
| 44970 | Laparoscopy appendectomy | $4175.69 | $578.17 | 7.2x |
| 43239 | Egd biopsy single/multiple | $722.25 | $123.58 | 5.8x |
| 27236 | Hip Fracture Repair | $4538.30 | $1089.87 | 4.2x |
| 20610 | Joint Injection (drainage) | $83.76 | $39.75 | 2.1x |
| 10060 | Abscess Drainage | $97.94 | $100.54 | 1.0x |
Color key: green <2x · yellow 2–5x · red >5x Medicare
Location
Map shows St. John Macomb Oakland Hospital-Warren Campus at 11800 E 12 MILE RD, Warren, Michigan, 48093. Nearby hospitals within 50 miles include St. John Providence (4.2 miles), Beaumont Hospital (6.0 miles), Beaumont Weight Control Center (9.4 miles).
Financial Assistance
Financial assistance policy: Not listed in current data
How to Dispute a Bill from St. John Macomb Oakland Hospital-Warren Campus
Last updated: 2026-02-20
Nearby Hospitals
How we grade this hospital
BillKarma calculates billing grades by comparing each hospital's gross charges to the 2026 Medicare Outpatient Prospective Payment System (OPPS) rate for the same CPT codes. We download and parse each hospital's CMS-mandated price transparency file, match procedure codes to Medicare benchmarks, calculate a markup ratio for each matched procedure, and average those ratios across all matched procedures to produce the hospital's overall markup.
Grade thresholds: A = 2.0x Medicare or less · B = 2.1x–3.0x · C = 3.1x–5.0x · D = 5.1x–8.0x · F = More than 8.0x Medicare
Data sources: CMS Hospital Price Transparency files (updated annually), CMS OPPS 2026 Final Rule, CMS Hospital Compare (star ratings). Grades are recalculated when hospitals post updated price files. Last file parse date is shown above.