Nancy Wei, M.D.
NPI 1083740732 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Wei, M.D. is a Internal Medicine Physician provider in Boston, MA (NPI 1083740732).
Provider details
- NPI number
- 1083740732
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- L-228187 (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
674 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 | 199 | $128 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 116 | $36 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 94 | $52 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 69 | $188 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 53 | $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'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 120 | 50 |
| Semaglutidebrand: Ozempic | 114 | 35 |
| Metformin Hcl | 101 | 42 |
| Dulaglutidebrand: Trulicity | 93 | 33 |
| Metformin Hclbrand: Metformin Hcl Er | 88 | 33 |
| Empagliflozinbrand: Jardiance | 73 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$30 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
- 2007-02-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is Nancy Wei's NPI number?
- Nancy Wei's National Provider Identifier (NPI) is 1083740732, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Wei's specialty?
- Nancy Wei is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Wei located?
- Nancy Wei's practice location on file with NPPES is Massachusetts General Hospital, Boston, MA 02114.
- What is Nancy Wei's phone number?
- The practice phone number listed in the NPPES registry for Nancy Wei is (617) 726-4900.
- Does Nancy Wei accept Medicare?
- Nancy Wei is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Wei's NPI active?
- Yes — Nancy Wei's NPI (1083740732) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.