Wei Sum Li, M.D.
NPI 1629425046ActiveIndividual· Internal Medicine· Charlestown, MA
Internal Medicine (M.D.) in Charlestown, Massachusetts, trained at University of Massachusetts Medical School (class of 2016). Their prescriptions cost Medicare Part D more than their services did: $297,860 for 3,133 claims, against $28,882 paid for services in 2024.
Overview
| NPI | 1629425046 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 16, 2016 |
| Last updated in NPPES | Oct 2, 2022 |
| Certified by provider | Oct 2, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 283634 | MA |
| Internal Medicine | 207R00000X | MD16644 | RI |
| Internal Medicine, Addiction Medicine | 207RA0401X | 283634 | MA |
| Internal Medicine | 207R00000X | LP03593 | RI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (MA); Practitioner - Internal Medicine (RI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 172 |
|---|---|
| Services billed | 456 across 22 procedure codes |
| Paid by Medicare | $28,882 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,133 · 6,170 30-day fills |
|---|---|
| Patients | 250 |
| Total drug cost | $297,860 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | University of Massachusetts Medical School |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Massachusetts General Physicians Organization IncBoston, MA · 3,558 clinicians
- Brigham and Womens Physicians Organization IncBoston, MA · 2,994 clinicians
- The General Hospital CorporationBoston, MA · 1,267 clinicians
Hospital affiliations
- Massachusetts Eye and Ear Infirmary -Boston, MA
- Massachusetts General HospitalBoston, MA
- North Shore Medical Center -Salem, MA
Other facilities
- Mass General Brigham Home Care, IncHome health agency · Newton, MA
- Spaulding Rehabilitation HospitalInpatient rehabilitation facility · Charlestown, MA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Charlestown
- 1144395179
- 1144204884
- 1508856808
- 1619958808
- 1639160146
- 1649700253
- 1790912285
- 1952419764
- 1710368121
- 1932181369
- 1053519835