Eric Thierman, MD
NPI 1235101908 · Internal Medicine Physician · Williamsville, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Eric Thierman, MD is a Internal Medicine Physician provider in Williamsville, NY (NPI 1235101908).
Provider details
- NPI number
- 1235101908
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 219381 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
323 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 123 | $83 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 93 | $123 |
| Administration of Influenza Virus VaccineG0008 | 42 | $31 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 33 | $13 |
| Urinalysis, Manual Test81002 | 21 | $3 |
| Annual Wellness Visit; Includes a Personalized Prevention Plan of Service (pps), Initial VisitG0438 | 11 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 131 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 494 | 146 |
| Atorvastatin Calcium | 440 | 113 |
| Levothyroxine Sodium | 310 | 76 |
| Prednisone | 295 | 168 |
| Pantoprazole Sodium | 253 | 90 |
| Amlodipine Besylate | 249 | 72 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$987 across 63 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
Additional practice locations (1)
- 500 Main StOlean, NY 14760-1514Phone: (716) 692-3302Fax: (716) 692-4342
Registry dates
- Enumerated
- 2006-02-06
- Last updated
- 2022-07-21
Frequently asked questions
- What is Eric Thierman's NPI number?
- Eric Thierman's National Provider Identifier (NPI) is 1235101908, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Eric Thierman's specialty?
- Eric Thierman is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Eric Thierman located?
- Eric Thierman's practice location on file with NPPES is 1835 Maple Rd, Williamsville, NY 14221-2780.
- What is Eric Thierman's phone number?
- The practice phone number listed in the NPPES registry for Eric Thierman is (716) 634-5410.
- Does Eric Thierman accept Medicare?
- Eric Thierman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Eric Thierman's NPI active?
- Yes — Eric Thierman's NPI (1235101908) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.