Physician Profile
Gregory C. Mahr, M.D.
Unclaimed ProfileAbout 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.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
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
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
Most searched conditions
- ADHD
- Anxiety
- Bipolar disorder
- Depression
- Schizophrenia
- Trauma
Anxiety, trauma, and obsessive-compulsive
- Agoraphobia
- OCD
- Panic disorder
- Social anxiety disorder
- Specific phobias
Mood disorders
- Premenstrual dysphoric disorder
- Seasonal affective disorder
Psychotic disorders
- Schizoaffective disorder
Substance-related and addictive
- Alcohol use disorder
- Opioid use disorder
Addiction & Substance Use
- Drug addiction
- Gambling Addiction
Cognitive and adjustment
- Dementia with behavioral symptoms
- Prolonged grief disorder
Eating Disorders
- Binge eating
- Eating disorders
Eating, sleep, and somatic
- Illness anxiety disorder
Mood & Depression
- Postpartum depression
Neurodevelopmental and behavioral
- Autism
- Oppositional defiant disorder
Personality and dissociative
- Borderline personality disorder
- Dissociative disorders
- Narcissistic personality disorder
Sleep & Wakefulness
- Insomnia and Sleep Problems
Procedures & services
Most searched procedures
- Anxiety and depression treatment
- Cognitive behavioral therapy
- Medication management
- Psychiatric evaluation
- Telepsychiatry
Assessment
- Suicide and safety risk assessment
Addiction care
- Addiction counseling
Addiction Medicine
- Alcohol Detox and Withdrawal Management
- Dual Diagnosis Treatment
- Suboxone Treatment and MAT
Assessments
- Adult ADHD Testing
- Autism testing
- Cognitive Assessment
Brain stimulation
- Neurofeedback
- Vagus Nerve Stimulation
Consultations
- Psychiatric Second Opinion
Diagnostics
- Neuropsychological Testing
- Psychiatric Genetic Testing
Inpatient care
- Inpatient Psychiatric Care
Interventional psychiatry
- Spravato Treatment
Psychotherapy
- Anger Management Counseling
- Couples counseling
- EMDR Therapy
- Exposure and Response Prevention
Sleep Medicine
- Sleep counseling
Specialized care
- Light Therapy
Therapy
- Acceptance and commitment therapy
- Dialectical Behavior Therapy
- Somatic experiencing
Therapy and care
- Family therapy
- Group psychotherapy
- Supportive psychotherapy
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. Guide.md cannot book appointments or pass on messages — please call the office directly.
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
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.