WILLIAM L. SIMPSON M.D.
NPI 1124092309
Internal Medicine in Warrenton, VA
About William L. Simpson M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM L. SIMPSON M.D. (NPI 1124092309) is an individual internal medicine provider in Warrenton, Virginia, licensed in Virginia (0101048951) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
William L. Simpson M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20186 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 Simpson's NPI number?
The NPI number for William Simpson is 1124092309. It was assigned to this individual provider in the NPPES registry on February 15, 2006.
Where is William Simpson located?
William Simpson practices at 332 W Lee Hwy # 251, Warrenton, VA 20186. The listed phone number is (833) 362-8800.
What is William Simpson's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is William Simpson enrolled in Medicare?
Yes. William Simpson is registered in the Medicare PECOS enrollment system.
What insurance does William Simpson accept?
Health plans from Molina Healthcare list William Simpson 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 Simpson was last updated on July 25, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.
