Ya Tze Tong, M.D.
NPI 1245298157ActiveIndividual· Internal Medicine· Concord, MA
Internal Medicine (M.D.) with Emerson Practice Associates, Inc, practicing in Concord, Massachusetts. 95 Medicare patients in 2024, $32,953 paid; nearly all of their 1,292 Part D prescriptions were generic (93%). Lilly USA, LLC was the largest of 6 companies reporting payments in 2025, $141.16 in all, mostly food and beverage. Lists Emerson Hospital - and 1 other hospital as hospital affiliations.
Overview
| NPI | 1245298157 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 2, 2006 |
| Last updated in NPPES | Jun 27, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 77476 | MA |
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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 95 |
|---|---|
| Services billed | 350 across 30 procedure codes |
| Paid by Medicare | $32,953 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,292 · 2,976 30-day fills |
|---|---|
| Patients | 190 |
| Total drug cost | $33,354 |
| Generic share | 93% of claims |
Education and affiliations
| Graduation year | 1981 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Emerson Practice Associates, IncConcord, MA · 240 clinicians
Hospital affiliations
- Emerson Hospital -W Concord, MA
- Massachusetts Eye and Ear Infirmary -Boston, MA
Other facilities
- Emerson Hospital Home Care ProgramHome health agency · Concord, MA
Industry payments (Open Payments)
- 2025$141.16 · 7 payments from 6 companies
- 2024$138.73 · 7 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $30.76 | 2 |
| Glaxosmithkline, LLC. | $25.88 | 1 |
| Astrazeneca Pharmaceuticals LP | $23.71 | 1 |
| Merck Sharp & Dohme LLC | $21.55 | 1 |
| Exact Sciences Corporation | $21.25 | 1 |
What the 2025 payments were for
- Food and Beverage$141.16 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 52 internal medicine physicians in Concord · All internal medicine physicians in Massachusetts