Jason Yang
Jason Yang is a Rheumatology Physician in Worcester, MA, registered under NPI 1003445164.
Getting there
Here is what surrounds this office in Worcester, based on OpenStreetMap data collected Aug 31, 2026. Parking is available about 477 ft away. The nearest transit stop is 0.28 mi away. If you arrive early, there is a coffee shop 0.47 mi away.
Getting here and what is nearby
Transit 311 ft ~2 min
Convenience Belmont Convenience 363 ft ~2 min
Parking 440 ft ~2 min
33 Kendall Street
Restaurant Jim's Pizza 423 ft ~2 min
Parking 468 ft ~2 min
49 Kendall Street
Parking 477 ft ~2 min
137 Belmont Street
Restaurant Belmont Vegetarian Restaurant 857 ft ~4 min
Transit 0.27 mi ~6 min
Transit 0.28 mi ~6 min
Hotel Hampton Inn & Suites 0.41 mi ~9 min
Hotel Courtyard Worcester 0.42 mi ~9 min
Hotel Holiday Inn Express Worcester Downtown 0.43 mi ~9 min
110 Summer Street
Coffee Starbucks 0.44 mi ~9 min
Restaurant Mezcal Tequila Kitchen 0.44 mi ~9 min
11 East Central Street, 01605
Th-Sa 11:00-00:00; Mo-We 11:00-22:00
Coffee Fuel America - Grove Street 0.47 mi ~10 min
100 Grove Street, Worcester 01605
Mo-Sa 08:00-18:00
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 1015462 | MA | Rheumatology Physician primary |
This provider holds licence 1015462 issued in MA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Rheumatology
- PAC ID
- 0547680928
- Enrollment ID
- I20260422000261
Medicare enrolment is recorded as approved under the provider type Practitioner - Rheumatology. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Rheumatology covers
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and "collagen" diseases. NUCC Health Care Provider Taxonomy, code 207RR0500X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003445164 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 2, 2020 |
| Last updated | Mar 12, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Practice address |
119 BELMONT ST Worcester, MA 01605 (508) 334-5224 Fax (508) 334-1053 |
| Mailing address |
PO BOX 415348 Boston, MA 02241 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 4 | 4 | 5 | 1 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 4 | 1 | 1 | 3 |
Sum = 46 · next multiple of 10 = 50 · check digit = 4 · actual last digit = 4
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.