Timothy Lamaster, M. D.
NPI 1437138229 · Family Medicine Physician · Duluth, MN
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Lamaster, M. D. is a Family Medicine Physician provider in Duluth, MN (NPI 1437138229).
Provider details
- NPI number
- 1437138229
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M. D.
- Sex
- Male
- Sole proprietor
- No
- License
- 36598 (MN)
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
20 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
415 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 | 198 | $94 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 88 | $130 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 66 | $63 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 39 | $76 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 13 | $106 |
| Biopsy of Related Skin Growth, First Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 106 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 439 | 125 |
| Rosuvastatin Calcium | 329 | 89 |
| Losartan Potassium | 321 | 83 |
| Amlodipine Besylate | 257 | 74 |
| Simvastatin | 179 | 42 |
| Metoprolol Succinate | 176 | 57 |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-11
- Last updated
- 2010-08-19
Frequently asked questions
- What is Timothy Lamaster's NPI number?
- Timothy Lamaster's National Provider Identifier (NPI) is 1437138229, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Lamaster's specialty?
- Timothy Lamaster is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Lamaster located?
- Timothy Lamaster's practice location on file with NPPES is 26 E Superior St, Duluth, MN 55802-2124.
- What is Timothy Lamaster's phone number?
- The practice phone number listed in the NPPES registry for Timothy Lamaster is (218) 249-4300.
- Does Timothy Lamaster accept Medicare?
- Timothy Lamaster is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Lamaster's NPI active?
- Yes — Timothy Lamaster's NPI (1437138229) is active in the NPPES registry as of the last update on 2010-08-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.