Isabelle Zamfirescu, MD
NPI 1881802031 · Endocrinology, Diabetes & Metabolism Physician · South Weymouth, MA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isabelle Zamfirescu, MD is a Endocrinology, Diabetes & Metabolism Physician provider in South Weymouth, MA (NPI 1881802031).
Provider details
- NPI number
- 1881802031
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 242591 (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
19 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
2,235 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 | 600 | $139 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 505 | $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 | 387 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 216 | $99 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 159 | $36 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 64 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 430 | 132 |
| Semaglutidebrand: Ozempic | 314 | 60 |
| Metformin Hclbrand: Metformin Hcl Er | 261 | 89 |
| Glipizidebrand: Glipizide Er | 218 | 63 |
| Pen Needle, Diabeticbrand: Nano 2nd Gen Pen Needle | 186 | 81 |
| Atorvastatin Calcium | 178 | 60 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$110 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
Registry dates
- Enumerated
- 2007-05-20
- Last updated
- 2010-04-20
Frequently asked questions
- What is Isabelle Zamfirescu's NPI number?
- Isabelle Zamfirescu's National Provider Identifier (NPI) is 1881802031, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isabelle Zamfirescu's specialty?
- Isabelle Zamfirescu is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Isabelle Zamfirescu located?
- Isabelle Zamfirescu's practice location on file with NPPES is 541 Main St, South Weymouth, MA 02190-1868.
- What is Isabelle Zamfirescu's phone number?
- The practice phone number listed in the NPPES registry for Isabelle Zamfirescu is (781) 952-1280.
- Does Isabelle Zamfirescu accept Medicare?
- Isabelle Zamfirescu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isabelle Zamfirescu's NPI active?
- Yes — Isabelle Zamfirescu's NPI (1881802031) is active in the NPPES registry as of the last update on 2010-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.