Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. William L. Guy, PHD, MD

Individual provider Psychiatry Physician · NPI 1295748101

Dr. William L. Guy, PHD, MD practises Psychiatry in Southfield, Michigan. Graduated from University of Michigan Medical School in 1994, 32 years ago. Practices with Optum Behavioral Care of Colorado PC, a 197-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Michigan.

Years since qualifying
32
Trained at
University of Michigan Medical School
Licensed in
MI
In the registry since
2006
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

22170 W 9 Mile Rd
Southfield, MI 48034-6007 Not confirmed with CMS for 19 years — call before visiting
Phone: (313) 319-8429
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 4301063551 (MI)

Record details

NPI number1295748101
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD , MD
Sole proprietorNo
NPI enumeratedAugust 14, 2006
Last updated in NPPESSeptember 10, 2007

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPSYCHIATRY
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 1994 (32 years in practice)
Group practice Optum Behavioral Care Of Colorado Pc — 197 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients121
Services billed 405 a service is one billed item, such as a visit, a test or a procedure
Average patient age65

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Compensation for services other than consulting , including serving as faculty or as a speaker at a venue other than a continuing education program $129,013 41 payments
Travel and Lodging $20,371 96 payments · travel or lodging paid or reimbursed, such as to attend a conference
Honoraria $11,800 5 payments
Consulting Fee $4,080 2 payments
Food and Beverage $3,922 61 payments · a meal or drink at a meeting or visit, not a fee
Education $8 1 payment · educational material or training, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at Optum Behavioral Care of Colorado PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 197 clinicians in the practice; 12 are shown here.

Other providers in Southfield