Stephen Alsdorf, M.D
NPI 1952358749 · Family Medicine Physician · Great Barrington, MA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Alsdorf, M.D is a Family Medicine Physician provider in Great Barrington, MA (NPI 1952358749).
Provider details
- NPI number
- 1952358749
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- 226367 (MA)
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
136 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) |
|---|---|---|
| Hemoglobin A1c Level83036 | 43 | $10 |
| Amplifed Dna Or Rna Probe Detection of Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19) Antigen87635 | 38 | $50 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Tracing93005 | 25 | $7 |
| Assessment of Emotional Or Behavioral Problems96127 | 16 | $5 |
| Automated Urinalysis Test81003 | 14 | $2 |
Typical Medicare-allowed amounts for these services range $2–$50 (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 · 81 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 364 | 110 |
| Amlodipine Besylate | 215 | 66 |
| Lisinopril | 183 | 58 |
| Losartan Potassium | 166 | 52 |
| Rosuvastatin Calcium | 138 | 56 |
| Levothyroxine Sodium | 135 | 37 |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-28
- Last updated
- 2018-07-25
Frequently asked questions
- What is Stephen Alsdorf's NPI number?
- Stephen Alsdorf's National Provider Identifier (NPI) is 1952358749, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Alsdorf's specialty?
- Stephen Alsdorf is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Alsdorf located?
- Stephen Alsdorf's practice location on file with NPPES is 444 Stockbridge Road, Great Barrington, MA 01230.
- What is Stephen Alsdorf's phone number?
- The practice phone number listed in the NPPES registry for Stephen Alsdorf is (413) 528-8580.
- Does Stephen Alsdorf accept Medicare?
- Stephen Alsdorf is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Alsdorf's NPI active?
- Yes — Stephen Alsdorf's NPI (1952358749) is active in the NPPES registry as of the last update on 2018-07-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.