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Edit this profileAt a glance
- 29427 Ryan Rd, Warren, MI 48092
About Dr. Hackenberger
John M. Hackenberger, DDS practices maxillofacial surgery in Warren, MI. John is a 1989 graduate of University of Michigan Medical School. John is also listed as specializing in oral & maxillofacial surgery (dental). According to Medicare claims data, the services billed most often include new patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more. The provider's National Provider Identifier (NPI) is 1790730406.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (586) 755-9340
- Email not available
Practice Locations
29427 RYAN RD
Warren, MI 48092
Procedures Most Often Billed to Medicare
16 services · 16 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
16 | Less often than most peers in Maxillofacial Surgery |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other maxillofacial surgeons at this location 2
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other maxillofacial surgeons in Warren 3
Same specialty, same city.
More connections — 13 related providers in 2 groups
Trained at University of Michigan Medical School 5
Other providers in the same specialty who trained at the same institution.
Class of 1989 at University of Michigan Medical School 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Hackenberger specialize in?
Dr. Hackenberger is a maxillofacial surgeon in Warren, MI. That is the designation recorded for this NPI in the federal registry, where it is listed as “Maxillofacial Surgery”.
NPI registry
Where is Dr. Hackenberger located?
Dr. Hackenberger is listed at 29427 Ryan Rd, Warren, MI 48092. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Hackenberger's phone number?
The number on file is (586) 755-9340. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Hackenberger's NPI number?
Dr. Hackenberger's National Provider Identifier is 1790730406. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Hackenberger go to medical school?
Dr. Hackenberger attended University of Michigan Medical School, graduating in 1989. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Hackenberger been practicing?
Dr. Hackenberger has 37 years experience. Calculated from a graduation year of 1989, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Hackenberger do most often?
According to Medicare billing data, Dr. Hackenberger the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Hackenberger confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Hackenberger. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.