Thomas Keown, MD
NPI 1992368781 · Emergency Medicine Physician · Vacaville, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Keown, MD is a Emergency Medicine Physician provider in Vacaville, CA (NPI 1992368781).
Provider details
- NPI number
- 1992368781
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A176080 (CA)
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
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
31 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 20 | $171 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 11 | $123 |
Typical Medicare-allowed amounts for these services range $123–$171 (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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 37 | 37 |
| Ondansetronbrand: Ondansetron Odt | 29 | 29 |
| Cefpodoxime Proxetil | 25 | 25 |
| Doxycycline Monohydrate | 24 | 24 |
| Prednisone | 23 | 23 |
| Cefadroxil | 19 | 19 |
| Ciprofloxacin Hcl | 17 | 17 |
Practice location
Mailing address
Additional practice locations (1)
- 975 Sereno DrVallejo, CA 94589-2441Phone: (707) 651-1025
Registry dates
- Enumerated
- 2019-04-17
- Last updated
- 2022-07-12
- Certified
- 2022-07-12
Frequently asked questions
- What is Thomas Keown's NPI number?
- Thomas Keown's National Provider Identifier (NPI) is 1992368781, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Keown's specialty?
- Thomas Keown is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Keown located?
- Thomas Keown's practice location on file with NPPES is 1 Quality Dr, Vacaville, CA 95688-9494.
- What is Thomas Keown's phone number?
- The practice phone number listed in the NPPES registry for Thomas Keown is (707) 624-2600.
- Does Thomas Keown accept Medicare?
- Thomas Keown is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Keown's NPI active?
- Yes — Thomas Keown's NPI (1992368781) is active in the NPPES registry as of the last update on 2022-07-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.