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DR. WILLIAM L. GUY PH.D., M.D.
NPI 1295748101
Psychiatry & Neurology - Psychiatry in Southfield, MI

Active since August 14, 2006PECOS EnrolledAccepts Medicare Assignment
22170 W 9 MILE RD, SOUTHFIELD, MI 48034(313) 319-8429 Get Directions Write a Review

NPPES record last updated: September 10, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. William L. Guy Ph.d., M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM L. GUY PH.D., M.D. (NPI 1295748101) is an individual psychiatry provider in Southfield, Michigan, licensed in Michigan (4301063551) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Michigan Medical School (1994).

NPPES Registry Identity

NPI1295748101
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. WILLIAM L. GUYCredential: PH.D., M.D.
Location Address22170 W 9 MILE RDSouthfield, MI 48034-6007
Mailing Address16 Riverbank DrBeverly Hills, MI 48025-4808 · (313) 319-8429
Phone(313) 319-8429
Sole ProprietorNo
Medical School CMSUniversity Of Michigan Medical SchoolGraduated 1994
Enumeration DateAugust 14, 2006
Last NPPES UpdateSeptember 10, 2007
✔ NPI 1295748101 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in MI · 4301063551
Definition
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.
22170 W 9 MILE RD, Southfield, MI 48034
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Other Identifiers 5

Medicare ID-Type Unspecified0N87510MI · Medicare
Other2608270052MI · Blue Cross/blue Sheildmi
OtherP00140666MI · Railroad Medicare
Medicare UPINH20429MI
Other2606324352MI · Blue Cross Blue Shield Mi

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William L. Guy Ph.d., M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3870581861
PECOS Enrollment IDI20040506000688
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

5

Medicare enrollment records show William Guy reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Hope Counseling Centers LLC
6.4 mi
Clinical
39111 6 MILE RD
Livonia, MI 48152
  • Reassigned Medicare billing, Michigan enrollment
  • 8 clinicians in this Medicare group
NPI 1730833138 (833) 789-4673
Optum Behavioral Care Of Colorado, P.C.
7.2 mi
Clinical
2550 S TELEGRAPH RD STE 250
Bloomfield Hills, MI 48302
  • Reassigned Medicare billing, Michigan enrollment
  • Medicare enrollment name: Optum Behavioral Care Of Colorado PC
  • Also billed through NPI 1619734969 (Michigan), NPI 1114784451 (Michigan)
  • 34 clinicians in this Medicare group
NPI 1851161285 (248) 322-0001
Abh Corporation
7.8 mi
Addiction (Substance Use Disorder)
40000 GRAND RIVER AVE STE 504
Novi, MI 48375
  • Reassigned Medicare billing, Michigan enrollment
  • 8 clinicians in this Medicare group
NPI 1487828281 (248) 426-9900
Pastoral Counseling And Consultation Service
13 mi
Mental Health (Including Community Mental Health Center)
24110 CHERRY HILL RD
Dearborn, MI 48124
  • Reassigned Medicare billing, Michigan enrollment
  • 6 clinicians in this Medicare group
NPI 1124146451 (313) 274-4510
Easterseals Morc Health Care, Inc.
13 mi
Psychiatry
2399 E WALTON BLVD
Auburn Hills, MI 48326
  • Reassigned Medicare billing, Michigan enrollment
  • 253 clinicians in this Medicare group
NPI 1376526616 (248) 475-6400

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
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.
355 services118 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
24 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48034 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$177.36 typical visit price
range $58.04 – $177.36
Typical copayment $44.34 (range $14.51 – $44.34)
Most-billed visit code 99205
Established Patient
$72.38 typical visit price
range $18.32 – $143.49
Typical copayment $18.09 (range $4.58 – $35.87)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

GEETHA MOHAN MD
Psychiatry & Neurology (Psychiatry)
22170 W 9 MILE RD
SOUTHFIELD, MI 48034
Oakland County (248) 372-6800
WILLIAM L. GUY, PH.D., M.D., P.L.C.
Psychiatry & Neurology (Psychiatry)
22170 W 9 MILE RD
SOUTHFIELD, MI 48034
Oakland County (313) 319-8429
SURJEET BAGGA MD
Psychiatry & Neurology (Psychiatry)
22170 W 9 MILE RD
SOUTHFIELD, MI 48034
Oakland County (248) 372-6800

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Guy's NPI number?

The NPI number for William Guy is 1295748101. It was assigned to this individual provider in the NPPES registry on August 14, 2006.

Where is William Guy located?

William Guy practices at 22170 W 9 Mile Rd, Southfield, MI 48034. The listed phone number is (313) 319-8429.

What is William Guy's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is William Guy enrolled in Medicare?

Yes. William Guy is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for William Guy's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Guy reassigns Medicare benefits to 5 organizations: Hope Counseling Centers LLC (Livonia, MI), Optum Behavioral Care Of Colorado, P.C. (Bloomfield Hills, MI), Abh Corporation (Novi, MI), Pastoral Counseling And Consultation Service (Dearborn, MI) and Easterseals Morc Health Care, Inc. (Auburn Hills, MI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Guy's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Guy accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 3 other insurers list William Guy as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for William Guy was last updated on September 10, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.