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Edit this profileAt a glance
- Kingswood Hospital, 10300 West Eight Mile Road, Ferndale, MI 48220
About Dr. Mahr
Gregory C. Mahr, M.D. is a healthcare provider in Ferndale, MI specializing in psychiatry. Gregory trained at Wayne State University School of Medicine, graduating in 1983. Medicare claims data shows Gregory provided 143 services to 137 patients. The services billed most often include psychiatric diagnostic evaluation with medical services, initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes, and subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes. This provider record is associated with NPI 1841350717.
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
- (248) 691-4865
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
KINGSWOOD HOSPITAL 10300 WEST EIGHT MILE ROAD
Ferndale, MI 48220
Conditions Commonly Evaluated or Treated
Within Psychiatry generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Cognitive and adjustment
Eating, sleep, and somatic
Geriatric care
Mental Health
Neurodevelopmental and behavioral
Most searched conditions
Anxiety, trauma, and obsessive-compulsive
Mood disorders
Psychotic disorders
Substance-related and addictive
Addiction & Substance Use
Eating Disorders
Mood & Depression
Personality and dissociative
Sleep & Wakefulness
Procedures & services
Advanced treatment
Assessment
Most searched procedures
- Anxiety and depression treatment
- Cognitive behavioral therapy
- Medication management
- Psychiatric evaluation
- Telepsychiatry
Addiction care
Addiction Medicine
Assessments
- Adult ADHD Testing
- Autism testing
- Cognitive Assessment
Brain stimulation
Consultations
Diagnostics
Inpatient care
Interventional psychiatry
Psychotherapy
Sleep Medicine
Specialized care
Therapy
Therapy and care
Procedures Most Often Billed to Medicare
143 services · 137 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Psychiatric diagnostic evaluation with medical services | Treatment | 90792 |
76 | More often than most peers in Psychiatry |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
32 | More often than most peers in Psychiatry |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
23 | Less often than most peers in Psychiatry |
| Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | Office visit | 99231 |
12 | Less often than most peers in Psychiatry |
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 psychiatrists in Ferndale 7
Same specialty, same city.
Trained at Wayne State University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1983 at Wayne State University School of Medicine 8
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
Also performs Psychiatric diagnostic evaluation with medical services 8
Providers in MI who bill this service to Medicare most often.
Common questions
What does Gregory C. Mahr specialize in?
Gregory C. Mahr is a psychiatrist in Ferndale, MI. That is the designation recorded for this NPI in the federal registry, where it is listed as “Psychiatry”.
NPI registry
Where is Gregory C. Mahr located?
Gregory C. Mahr is listed at Kingswood Hospital 10300 West Eight Mile Road, Ferndale, MI 48220. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Gregory C. Mahr's phone number?
The number on file is (248) 691-4865. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Gregory C. Mahr?
Gregory C. Mahr's National Provider Identifier is 1841350717. 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 Gregory C. Mahr train?
Gregory C. Mahr attended Wayne State University School of Medicine, graduating in 1983. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Gregory C. Mahr have?
Gregory C. Mahr has 43 years experience. Calculated from a graduation year of 1983, reported in the CMS National Downloadable File.
CMS public data
What does Gregory C. Mahr do most often?
According to Medicare billing data, Gregory C. Mahr provides treatments such as psychiatric diagnostic evaluation with medical services, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Gregory C. Mahr's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Gregory C. Mahr. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.