John Hackenberger, DDS
Oral and Maxillofacial Surgery · Warren, MINPI 1790730406
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $4,347 of the $5,536 with a category attached, or 78.5%. Zimvie Inc. accounts for 96.8% of it on its own, with 6 other manufacturers making up the rest. Reporting peaked in 2022 at $2,491 and has fallen 59.5% since, to $1,009 in 2025. Among oral and maxillofacial surgery clinicians in MI with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 55 payments — averaging $100.66 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Zimvie Inc.$5K
- Zimmer Biomet$63
- Keystone Dental Inc.$34
- Carestream Dental, LLC$30
- Nobel Biocare USA$18
- Salvin Dental Specialties, Inc.$18
- plus $13 from 1 others
What the payments were for
- Travel & lodging$4,34779%
- Food & beverage$1,15621%
- Entertainment$341%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Zimvie Inc. | 46 | $5,360 |
| Zimmer Biomet | 3 | $63 |
| Keystone Dental Inc. | 2 | $34 |
| Carestream Dental, LLC | 1 | $30 |
| Nobel Biocare USA | 1 | $18 |
| Salvin Dental Specialties, Inc. | 1 | $18 |
| Southern Anesthesia & Surgical, Inc (dba ACE Southern) | 1 | $13 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- Tapered Screw-Vent$2,289
How this compares
$5,536 in reported general payments places this provider in the 90th percentile of 231 oral and maxillofacial surgery providers in Michigan.
See all oral and maxillofacial surgery providers in Michigan →
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Chlorhexidine Gluconate | 178 | $776 |
| Amoxicillin | 192 | $473 |
| Clindamycin Hcl | 105 | $406 |
| Ibuprofen | 96 | $247 |
| Nystatin | 12 | $162 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 71 | $149 |
| Acetaminophen-CodeineAcetaminophen With Codeine | 65 | $133 |
| Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav | 15 | $64 |
| Tramadol Hcl | 33 | $42 |
| IbuIbuprofen | 11 | $16 |
Paid to pharmacies, not to this prescriber.
Other oral and maxillofacial surgery in Warren
- Carlos Ramirez NeyraWarren$233K
- Jonattan AnguloWarren$9K
- Zaid Abu-SeirWarren$6K
- David CoviakWarren$6K
- Michael KraemerWarren$3K
- Arshi LehalWarren$3K
- Gregory ThomasWarren$2K
- Sean EdwardsAnn Arbor$165K
- David WilsonPortage$34K
- Rushil DangDetroit$34K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.