Peter Kowalski, MD
NPI 1003809393 · Family Medicine Physician · Williamsville, NY
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Kowalski, MD is a Family Medicine Physician provider in Williamsville, NY (NPI 1003809393).
Provider details
- NPI number
- 1003809393
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 171307 (NY)
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
238 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) |
|---|---|---|
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 68 | $123 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 62 | $86 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 41 | $122 |
| 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 | 31 | $16 |
| Hemoglobin A1c Level83036 | 22 | $10 |
| Administration of Influenza Virus Vaccine |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 107 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 364 | 99 |
| Amlodipine Besylate | 334 | 85 |
| Levothyroxine Sodium | 297 | 80 |
| Atorvastatin Calcium | 272 | 79 |
| Omeprazole | 257 | 60 |
| Rosuvastatin Calcium | 254 | 78 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-23
- Last updated
- 2012-06-05
Frequently asked questions
- What is Peter Kowalski's NPI number?
- Peter Kowalski's National Provider Identifier (NPI) is 1003809393, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Kowalski's specialty?
- Peter Kowalski is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Kowalski located?
- Peter Kowalski's practice location on file with NPPES is 850 Hopkins Rd, Williamsville, NY 14221-1729.
- What is Peter Kowalski's phone number?
- The practice phone number listed in the NPPES registry for Peter Kowalski is (716) 688-9641.
- Does Peter Kowalski accept Medicare?
- Peter Kowalski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Kowalski's NPI active?
- Yes — Peter Kowalski's NPI (1003809393) is active in the NPPES registry as of the last update on 2012-06-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.