Thomas Larsen, MD
NPI 1285998146 · Family Medicine Physician · South Bend, IN
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Larsen, MD is a Family Medicine Physician provider in South Bend, IN (NPI 1285998146).
Provider details
- NPI number
- 1285998146
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 01075173A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,224 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 358 | $117 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 295 | $9 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 285 | $15 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test85027 | 159 | $6 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 152 | $119 |
| Blood Test, Comprehensive Group of Blood Chemicals |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 136 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 578 | 156 |
| Amlodipine Besylate | 463 | 124 |
| Levothyroxine Sodium | 297 | 74 |
| Losartan Potassium | 270 | 74 |
| Lisinopril | 221 | 58 |
| Rosuvastatin Calcium | 152 | 46 |
| Tamsulosin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$243 across 12 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-06-26
- Last updated
- 2015-09-09
Frequently asked questions
- What is Thomas Larsen's NPI number?
- Thomas Larsen's National Provider Identifier (NPI) is 1285998146, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Larsen's specialty?
- Thomas Larsen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Larsen located?
- Thomas Larsen's practice location on file with NPPES is 4440 Portage Ave, South Bend, IN 46628-9570.
- What is Thomas Larsen's phone number?
- The practice phone number listed in the NPPES registry for Thomas Larsen is (574) 204-6200.
- Does Thomas Larsen accept Medicare?
- Thomas Larsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Larsen's NPI active?
- Yes — Thomas Larsen's NPI (1285998146) is active in the NPPES registry as of the last update on 2015-09-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.