GREGORY C. MAHR M.D.
NPI 1841350717
Psychiatry & Neurology - Psychiatry in Ferndale, MI

NPI Status: Active since December 11, 2006

Contact Information

KINGSWOOD HOSPITAL
10300 WEST EIGHT MILE ROAD
FERNDALE, MI
ZIP 48220
Phone: (248) 691-4865
Fax: (248) 691-4877

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  • Individual
  • Male
  • Years of Experience 43
  • Psychiatry & Neurology
  • Psychiatry
  • Accepts Insurance
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About GREGORY MAHR

This page provides the complete NPI Profile along with additional information for Gregory Mahr, a provider established in Ferndale, Michigan with a medical specialization in Psychiatry & Neurology, focusing in psychiatry and more than 43 years of experience. He graduated from Wayne State University School Of Medicine in 1983. The healthcare provider is registered in the NPI registry with number 1841350717 assigned on December 2006. The practitioner's primary taxonomy code is 2084P0800X with license number 4301047989 (MI). The provider is registered as an individual and his NPI record was last updated 7 years ago.

NPI
1841350717
Provider Name
GREGORY C. MAHR M.D.
Gender
Male
Entity Type
Individual
Location Address
KINGSWOOD HOSPITAL 10300 WEST EIGHT MILE ROAD FERNDALE, MI 48220
Location Phone
(248) 691-4865
Location Fax
(248) 691-4877
Mailing Address
KINGSWOOD HOSPITAL 10300 WEST EIGHT MILE ROAD FERNDALE, MI 48220
Mailing Phone
(248) 691-4865
Medical School Name
WAYNE STATE UNIVERSITY SCHOOL OF MEDICINE
Graduation Year
1983
Is Sole Proprietor?
No
Enumeration Date
12-11-2006
Last Update Date
07-31-2018
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A psychiatrist like Gregory Mahr are primary mental health physicians diagnose and treat mental illnesses through psychotherapy, psychoanalysis, hospitalization and medication. Psychiatrist help patients find solutions through changes in their behavioral patterns, explorations of experiences, group and family therapy.

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Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Psychiatry & Neurology Psychiatry

Taxonomy Code
2084P0800X
Type
Allopathic & Osteopathic Physicians
License No.
4301047989
License State
MI
Taxonomy Description
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

  • Blue Cross� Local HMO Bronze Extra - HMO
  • Blue Cross� Local HMO Bronze Secure - HMO
  • Blue Cross� Local HMO Silver Extra - HMO
  • Blue Cross� Local HMO Silver Saver - HMO
  • Blue Cross� Metro Detroit HMO Bronze Extra - HMO
  • Blue Cross� Metro Detroit HMO Silver Extra - HMO
  • Blue Cross� Preferred HMO Bronze Extra - HMO
  • Blue Cross� Preferred HMO Bronze Saver HSA - HMO
  • Blue Cross� Preferred HMO Bronze Secure - HMO
  • Blue Cross� Preferred HMO Gold - HMO
  • Blue Cross� Preferred HMO Gold Extra - HMO
  • Blue Cross� Preferred HMO Silver - HMO
  • Blue Cross� Preferred HMO Silver Extra - HMO
  • Blue Cross� Preferred HMO Silver Saver - HMO
  • Blue Cross� Preferred HMO Value - HMO
  • Blue Cross� Select HMO Bronze Extra - HMO
  • Blue Cross� Select HMO Bronze Saver HSA - HMO
  • Blue Cross� Select HMO Bronze Secure - HMO
  • Blue Cross� Select HMO Silver - HMO
  • Blue Cross� Select HMO Silver Extra - HMO
  • Blue Cross� Premier PPO Bronze Extra - PPO
  • Blue Cross� Premier PPO Bronze HSA - PPO
  • Blue Cross� Premier PPO Bronze Secure - PPO
  • Blue Cross� Premier PPO Gold - PPO
  • Blue Cross� Premier PPO Gold Extra - PPO
  • Blue Cross� Premier PPO Silver - PPO
  • Blue Cross� Premier PPO Silver Extra - PPO
  • Blue Cross� Premier PPO Silver Saver HSA - PPO
  • Blue Cross� Premier PPO Value - PPO
  • Bronze First - HMO
  • Bronze First Adult Vision & Fitness - HMO
  • Diabetes Gold - HMO
  • Diabetes Gold Adult Vision & Fitness - HMO
  • Diabetes Silver - HMO
  • Diabetes Silver Adult Vision & Fitness - HMO
  • Gold - HMO
  • Gold Adult Vision & Fitness - HMO
  • HDHP Preventive Silver - HMO
  • Healthy Heart Gold - HMO
  • Healthy Heart Gold Adult Vision & Fitness - HMO
  • Healthy Heart Silver - HMO
  • Healthy Heart Silver Adult Vision & Fitness - HMO
  • Low Premium Silver - HMO
  • Low Premium Silver Adult Vision & Fitness - HMO
  • Silver - HMO
  • Silver Adult Vision & Fitness - HMO
  • MHP Bronze - HMO
  • MHP Bronze Saver (Expanded) - HMO
  • MHP Expanded Bronze Standard - HMO
  • MHP Gold - HMO
  • MHP Gold Standard - HMO
  • MHP Silver Exchange - HMO
  • MHP Silver Exchange Rewards - HMO
  • MHP Silver Standard - HMO
  • MHP Young Adult/Catastrophic - HMO
  • Gold 1 - HMO
  • Gold 1 with Adult Vision Services - HMO
  • Gold 8 - HMO
  • Silver 1 - HMO
  • Silver 1 with Adult Vision Services - HMO
  • Silver 12 with First 4 Primary Care Visits Free - HMO
  • Silver 8 - HMO
  • Bronze Classic 4700 - EPO
  • Bronze Classic Standard - EPO
  • Bronze Elite + PCP Saver Plus - EPO
  • Gold Classic Standard - EPO
  • Gold Elite Saver Plus - EPO
  • Secure - EPO
  • Silver Classic - EPO
  • Silver Classic Standard - EPO
  • Silver Simple PCP Saver - EPO
  • MyPriority Balanced Silver - HMO
  • MyPriority Balanced Silver Bronson Healthcare Partners - HMO
  • MyPriority Balanced Silver Corewell Health West Michigan Network - HMO
  • MyPriority Balanced Silver Corewell Health West Michigan Network (Allegan, Barry) - HMO
  • MyPriority Balanced Silver Southeast Michigan Network - HMO
  • MyPriority Balanced Silver Trinity Health East Network - HMO
  • MyPriority Enhanced Gold Bronson Healthcare Partners - HMO
  • MyPriority Enhanced Gold Corewell Health West Michigan Network - HMO
  • MyPriority Enhanced Gold Corewell Health West Michigan Network (Allegan, Barry) - HMO
  • MyPriority Enhanced Gold Southeast Michigan Network - HMO
  • MyPriority Enhanced Gold Trinity Health East Network - HMO
  • MyPriority Premier Silver - HMO
  • MyPriority Premier Silver Bronson Healthcare Partners - HMO
  • MyPriority Premier Silver Corewell Health West Michigan Network - HMO
  • MyPriority Premier Silver Corewell Health West Michigan Network (Allegan, Barry) - HMO
  • MyPriority Premier Silver Southeast Michigan Network - HMO
  • MyPriority Premier Silver Trinity Health East Network - HMO
  • MyPriority Standard Bronze - HMO
  • MyPriority Standard Bronze - Bronson Healthcare Partners - HMO
  • MyPriority Standard Bronze - Corewell Health West Michigan Network - HMO

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier Type / Code Identifier State Identifier Issuer
GM047989OTHER (01)CHAMPUS-CHAMPUS
GM047989OTHER (01)COMMERCIAL-COMMERCIAL NUMBER
309201510MEDICAID (05)MI 
700H262290OTHER (01)BLUE CROSS-BLUE CROSS

Medicare Participation & PECOS Enrollment Status

Gregory Mahr is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Gregory Mahr is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 9638257884

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20080429000246

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Established patient office or other outpatient visit, 30-39 minutes

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

This service was performed 12 times for 11 patients

Follow-up hospital inpatient care per day, typically 15 minutes

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

This service was performed 24 times for 20 patients

Initial hospital inpatient care per day, typically 50 minutes

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

This service was performed 18 times for 17 patients

Psychiatric diagnostic evaluation with medical services

A psychiatric diagnostic evaluation with medical services is a comprehensive assessment. It includes a detailed examination of your mental health and physical wellbeing, as well as your personal and family history. This evaluation aids in creating an effective treatment plan.

This service was performed 59 times for 58 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $44.34 for a new patient copayment and $18.09 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 48220 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99205

  • Average New Patient Price $177.36
  • Minimum New Patient Price $58.04
  • Maximum New Patient Price $177.36
  • Average New Patient Copayment $44.34
  • Minimum New Patient Copayment $14.51
  • Maximum New Patient Copayment $44.34

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99213

  • Average Established Patient Price $72.38
  • Minimum Established Patient Price $18.32
  • Maximum Established Patient Price $143.49
  • Average Established Patient Copayment $18.09
  • Minimum Established Patient Copayment $4.58
  • Maximum Established Patient Copayment $35.87

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Gregory Mahr is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
HENRY FORD HEALTH HOSPITAL2799 W GRAND BLVD
DETROIT, MI 48202
(313) 916-2600Acute Care Hospitals
HENRY FORD HEALTH WEST BLOOMFIELD HOSPITAL6777 WEST MAPLE ROAD
WEST BLOOMFIELD, MI 48322
(248) 325-1000Acute Care Hospitals

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NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1841350717
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
288165072
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 8 + 8 + 1 + 6 + 5 + 0 + 7 + 2 + 24 = 63
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 63 = 77

The NPI number 1841350717 is valid because the calculated check digit 7 using the Luhn validation algorithm matches the last digit of the original NPI number.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1841350717, enumerated in the NPI registry as an "individual" on December 11, 2006

The provider is located at Kingswood Hospital 10300 West Eight Mile Road Ferndale, Mi 48220 and the phone number is (248) 691-4865

The provider's speciality is Psychiatry & Neurology with taxonomy code 2084P0800X with a focus in Psychiatry

The provider has more than 43 years of experience. He graduated from Wayne State University School Of Medicine in 1983.

The provider might be accepting Accepts: Blue Care Network of Michigan, Blue Cross Blue. Please consult your insurance carrier or call the provider to make sure your health plan is currently accepted.

Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

Medicare beneficiaries should expect a typical cost of $177.36 with an average copayment of $44.34 for new patient appointments. Established patients should expect a typical charge of $72.38 and an average copayment of 18.09. Please review your insurance plan or contact the provider directly to determine your specific costs.

The most common procedures or services performed by this practitioner are: Established patient office or other outpatient visit, 30-39 minutes, Follow-up hospital inpatient care per day, typically 15 minutes, Initial hospital inpatient care per day, typically 50 minutes and Psychiatric diagnostic evaluation with medical services.

The practitioner is affiliated to the following hospital(s): HENRY FORD HEALTH HOSPITAL and HENRY FORD HEALTH WEST BLOOMFIELD HOSPITAL. Hospital affiliations are identified through self-reporting data and service claims based on the place of service.

This NPI record was last updated on December 11, 2006. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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