William Simpson, M.D.
NPI 1124092309 · Internal Medicine Physician · Warrenton, VA
William Simpson, M.D. is a Internal Medicine Physician provider in Warrenton, VA (NPI 1124092309).
Provider details
- NPI number
- 1124092309
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 0101048951 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 36 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 49 | 14 |
| Sertraline Hcl | 44 | — |
| Lisinopril | 43 | 14 |
| Amlodipine Besylate | 41 | 14 |
| Trazodone Hcl | 29 | — |
| Atorvastatin Calcium | 26 | — |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-15
- Last updated
- 2025-07-25
- Certified
- 2025-07-25
Frequently asked questions
- What is William Simpson's NPI number?
- William Simpson's National Provider Identifier (NPI) is 1124092309, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Simpson's specialty?
- William Simpson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Simpson located?
- William Simpson's practice location on file with NPPES is 332 W Lee Hwy # 251, Warrenton, VA 20186-2428.
- What is William Simpson's phone number?
- The practice phone number listed in the NPPES registry for William Simpson is (833) 362-8800.
- Is William Simpson's NPI active?
- Yes — William Simpson's NPI (1124092309) is active in the NPPES registry as of the last update on 2025-07-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.