Physician Profile
Unclaimed ProfileAbout BARKER
William J Barker, MD practices emergency medical services in Warrenton, VA. Medicare claims data shows William provided 211 services to 208 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Areas of Expertise
Common questions
What is Dr. Barker's specialty?
Dr. Barker is an emergency medical services in Warrenton, VA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “Emergency Medical Services”.
NPI registry
Where can I find Dr. Barker?
Dr. Barker is listed at 500 HOSPITAL DR, Warrenton, VA 20186. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Barker?
The number on file is (540) 349-0595. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Barker?
Dr. Barker's National Provider Identifier is 1770599847. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How much experience does Dr. Barker have?
Dr. Barker has 20+ years experience. Registered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What is Dr. Barker known for?
According to Medicare billing data, Dr. Barker the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Barker's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Barker. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (540) 349-0595
- Email not available
Practice Locations
500 HOSPITAL DR
Warrenton, VA 20186
Procedures Most Often Billed to Medicare
211 services · 208 patients · 4 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
85 |
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
71 |
| Critical care, first 30-74 minutes | Office visit | 99291 |
41 |
| Emergency department visit with low level of medical decision making | Office visit | 99283 |
14 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other emergency medical serviceses at this location 3
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.