Matthew Spitzer, MD
NPI 1770743999 · Endocrinology, Diabetes & Metabolism Physician · Greenfield, MA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Spitzer, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Greenfield, MA (NPI 1770743999).
Provider details
- NPI number
- 1770743999
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 249715 (MA)
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
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
4,700 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 | 715 | $129 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 526 | $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 | 517 | $16 |
| Hemoglobin A1c Level83036 | 287 | $9 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 265 | $16 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 |
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 |
|---|---|---|
| Levothyroxine Sodium | 545 | 129 |
| Semaglutidebrand: Ozempic | 231 | 50 |
| Pen Needle, Diabeticbrand: Nano 2nd Gen Pen Needle | 193 | 88 |
| Empagliflozinbrand: Jardiance | 182 | 44 |
| Tirzepatidebrand: Mounjaro | 171 | 35 |
| Atorvastatin Calcium | 149 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$101 across 1 record (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 (3)
- 31 Hall DrAmherst, MA 01002-2751Phone: (413) 256-8561Fax: (866) 644-0869
- 238 Northampton StEasthampton, MA 01027-1046Phone: (413) 529-9300Fax: (866) 644-0870
- 70 Main StFlorence, MA 01062Phone: (413) 586-8400Fax: (866) 644-0872
Registry dates
- Enumerated
- 2008-06-11
- Last updated
- 2024-03-27
- Certified
- 2024-03-27
Frequently asked questions
- What is Matthew Spitzer's NPI number?
- Matthew Spitzer's National Provider Identifier (NPI) is 1770743999, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Spitzer's specialty?
- Matthew Spitzer is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Spitzer located?
- Matthew Spitzer's practice location on file with NPPES is 329 Conway St, Greenfield, MA 01301-1521.
- What is Matthew Spitzer's phone number?
- The practice phone number listed in the NPPES registry for Matthew Spitzer is (413) 774-6301.
- Does Matthew Spitzer accept Medicare?
- Matthew Spitzer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Spitzer's NPI active?
- Yes — Matthew Spitzer's NPI (1770743999) is active in the NPPES registry as of the last update on 2024-03-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.