DR. LEI PEI MD
NPI 1053773606
Internal Medicine - Endocrinology, Diabetes & Metabolism in Boston, MA
About Dr. Lei Pei Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LEI PEI MD (NPI 1053773606) is an individual endocrinology, diabetes & metabolism provider in Boston, Massachusetts, licensed in Massachusetts (292401) and active in the NPI registry since March 2016. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and maintains a secondary practice location in Brighton.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Lei Pei Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Lei Pei reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02118
- Reassigned Medicare billing, Massachusetts enrollment
- 716 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Watertown, MA 02472
- Reassigned Medicare billing, Massachusetts enrollment
- 1,103 clinicians in this Medicare group
Brockton, MA 02301
- Reassigned Medicare billing, Massachusetts enrollment
- 264 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAMartha's Vineyard Hospital Inc
Critical Access Hospitals · Oak Bluffs, MAWentworth-Douglass Hospital
Acute Care Hospitals · Dover, NHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02215 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Lei Pei's NPI number?
The NPI number for Lei Pei is 1053773606. It was assigned to this individual provider in the NPPES registry on March 23, 2016.
Where is Lei Pei located?
Lei Pei practices at 330 Brookline Ave, Boston, MA 02215. The listed phone number is (617) 667-9344.
What is Lei Pei's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Lei Pei enrolled in Medicare?
Yes. Lei Pei is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Lei Pei's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lei Pei reassigns Medicare benefits to 5 organizations: Bmc Affiliated Physicians, Inc. (Boston, MA), The General Hospital Corporation (Boston, MA), Massachusetts General Physicians Organization Inc (Boston, MA), Steward Medical Group, Inc (Watertown, MA) and Revere Medical Of Massachusetts, PC (Brockton, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Lei Pei's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Lei Pei accept?
Health plans from Anthem Blue Cross and Blue Shield and WellSense Health Plan list Lei Pei as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Lei Pei affiliated with any hospitals?
According to CMS data, Lei Pei is affiliated with Massachusetts General Hospital, Brigham And Women's Hospital, Martha's Vineyard Hospital Inc and Wentworth-Douglass Hospital.
When was this NPI record last updated?
The NPPES record for Lei Pei was last updated on March 5, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Lei Pei, MD · NPI 1053773606
Endocrinology, Diabetes & Metabolism physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since March 23, 2016.
## Identity
- **NPI:** 1053773606 (Entity type: Individual)
- **Enumerated:** March 23, 2016
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** 292401 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 330 BROOKLINE AVE, Boston, MA 02215-5400
- **Phone:** (617) 667-9344 · **Fax:** (617) 667-7060
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Bmc Affiliated Physicians, Inc. (NPI 1245320910, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); Steward Medical Group, Inc (NPI 1629398219, Watertown, MA); Revere Medical Of Massachusetts, PC (NPI 1336976539, Brockton, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2011
## Record status
- **NPPES last updated:** March 5, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1053773606) · Data from the CMS NPPES public registry.