William Marshall, M.D.
NPI 1104992627 · Psychiatry Physician · Clemmons, NC
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Marshall, M.D. is a Psychiatry Physician provider in Clemmons, NC (NPI 1104992627).
Provider details
- NPI number
- 1104992627
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 28539 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,862 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 616 | $62 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 430 | $79 |
| Psychotherapy, 1 Hour90837 | 384 | $133 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 289 | $108 |
| Psychotherapy With Evaluation and Management Visit, 45 Minutes90836 | 77 | $77 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 39 | $169 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 48 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Alprazolam | 644 | 83 |
| Trazodone Hcl | 299 | 85 |
| Clonazepam | 236 | 35 |
| Bupropion Hclbrand: Bupropion Xl | 157 | 40 |
| Lamotrigine | 153 | 36 |
| Aripiprazole | 142 | 44 |
| Sertraline Hcl | 139 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-27
- Last updated
- 2025-11-06
- Certified
- 2025-11-06
Frequently asked questions
- What is William Marshall's NPI number?
- William Marshall's National Provider Identifier (NPI) is 1104992627, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Marshall's specialty?
- William Marshall is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is William Marshall located?
- William Marshall's practice location on file with NPPES is 2255 Lewisville Clemmons Rd Ste E, Clemmons, NC 27012-7460.
- What is William Marshall's phone number?
- The practice phone number listed in the NPPES registry for William Marshall is (336) 766-0505.
- Does William Marshall accept Medicare?
- William Marshall is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Marshall's NPI active?
- Yes — William Marshall's NPI (1104992627) is active in the NPPES registry as of the last update on 2025-11-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.