Ellen Marqusee, MD
NPI 1215988266 · Endocrinology, Diabetes & Metabolism Physician · Boston, MA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ellen Marqusee, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Boston, MA (NPI 1215988266).
Provider details
- NPI number
- 1215988266
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 80411 (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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
531 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 278 | $107 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 86 | $139 |
| Fine Needle Aspiration Biopsy Using Ultrasound Guidance, First Growth10005 | 49 | $75 |
| 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 | 36 | $17 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 28 | $130 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 531 | 149 |
| Levothyroxine Sodiumbrand: Synthroid | 114 | 34 |
| Methimazole | 66 | 21 |
| Alendronate Sodium | 51 | 17 |
| Levothyroxine Sodiumbrand: Levoxyl | 37 | — |
| Calcitriol | 23 | — |
| Dulaglutidebrand: Trulicity |
Practice location
Mailing address
Additional practice locations (1)
- 77 Avenue Louis PasteurBrigham and Womens Hospital Thyroid DivisionBoston, MA 02115Phone: (617) 525-5150
Registry dates
- Enumerated
- 2006-05-15
- Last updated
- 2025-10-15
- Certified
- 2025-10-15
Frequently asked questions
- What is Ellen Marqusee's NPI number?
- Ellen Marqusee's National Provider Identifier (NPI) is 1215988266, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ellen Marqusee's specialty?
- Ellen Marqusee is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Ellen Marqusee located?
- Ellen Marqusee's practice location on file with NPPES is 75 Francis St, Boston, MA 02115-6110.
- What is Ellen Marqusee's phone number?
- The practice phone number listed in the NPPES registry for Ellen Marqusee is (617) 732-5500.
- Does Ellen Marqusee accept Medicare?
- Ellen Marqusee is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ellen Marqusee's NPI active?
- Yes — Ellen Marqusee's NPI (1215988266) is active in the NPPES registry as of the last update on 2025-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.