Thomas Erskine, M.D.
NPI 1194732339 · Internal Medicine Physician · Vacaville, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Erskine, M.D. is a Internal Medicine Physician provider in Vacaville, CA (NPI 1194732339).
Provider details
- NPI number
- 1194732339
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A63845 (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
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
680 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 334 | $88 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 213 | $60 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 133 | $132 |
Typical Medicare-allowed amounts for these services range $60–$132 (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 · 113 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 532 | 155 |
| Amlodipine Besylate | 375 | 112 |
| Levothyroxine Sodium | 336 | 101 |
| Omeprazole | 257 | 74 |
| Lisinopril | 230 | 68 |
| Rosuvastatin Calcium | 192 | 56 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-01
- Last updated
- 2017-02-21
Frequently asked questions
- What is Thomas Erskine's NPI number?
- Thomas Erskine's National Provider Identifier (NPI) is 1194732339, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Erskine's specialty?
- Thomas Erskine is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Erskine located?
- Thomas Erskine's practice location on file with NPPES is 1010 Nut Tree Rd, Vacaville, CA 95687-4172.
- What is Thomas Erskine's phone number?
- The practice phone number listed in the NPPES registry for Thomas Erskine is (707) 624-7979.
- Does Thomas Erskine accept Medicare?
- Thomas Erskine is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Erskine's NPI active?
- Yes — Thomas Erskine's NPI (1194732339) is active in the NPPES registry as of the last update on 2017-02-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.