William Guy, PH.D., M.D.
NPI 1295748101 · Psychiatry Physician · Southfield, MI
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Guy, PH.D., M.D. is a Psychiatry Physician provider in Southfield, MI (NPI 1295748101).
Provider details
- NPI number
- 1295748101
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- PH.D., M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301063551 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
379 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 355 | $127 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 24 | $168 |
Typical Medicare-allowed amounts for these services range $127–$168 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 120 | 25 |
| Gabapentin | 94 | 24 |
| Bupropion Hclbrand: Bupropion Xl | 73 | 11 |
| Lamotrigine | 57 | 12 |
| Alprazolam | 56 | 14 |
| Clonazepam | 54 | — |
| Trazodone Hcl | 48 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$133,898 across 211 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-14
- Last updated
- 2007-09-10
Frequently asked questions
- What is William Guy's NPI number?
- William Guy's National Provider Identifier (NPI) is 1295748101, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Guy's specialty?
- William Guy is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is William Guy located?
- William Guy's practice location on file with NPPES is 22170 W 9 Mile Rd, Southfield, MI 48034-6007.
- What is William Guy's phone number?
- The practice phone number listed in the NPPES registry for William Guy is (313) 319-8429.
- Does William Guy accept Medicare?
- William Guy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Guy's NPI active?
- Yes — William Guy's NPI (1295748101) is active in the NPPES registry as of the last update on 2007-09-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.