Jason Yang
NPI 1003445164 · Rheumatology Physician · Worcester, MA
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jason Yang is a Rheumatology Physician provider in Worcester, MA (NPI 1003445164).
Provider details
- NPI number
- 1003445164
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 1015462 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Prednisone | 13 |
| Methotrexate Sodiumbrand: Methotrexate | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 55 Lake Ave NWorcester, MA 01655-0002Phone: (508) 334-5224Fax: (508) 334-1053
Registry dates
- Enumerated
- 2020-04-02
- Last updated
- 2026-03-12
- Certified
- 2026-03-12
Frequently asked questions
- What is Jason Yang's NPI number?
- Jason Yang's National Provider Identifier (NPI) is 1003445164, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jason Yang's specialty?
- Jason Yang is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Jason Yang located?
- Jason Yang's practice location on file with NPPES is 119 Belmont St, Worcester, MA 01605-2903.
- What is Jason Yang's phone number?
- The practice phone number listed in the NPPES registry for Jason Yang is (508) 334-5224.
- Does Jason Yang accept Medicare?
- Jason Yang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jason Yang's NPI active?
- Yes — Jason Yang's NPI (1003445164) is active in the NPPES registry as of the last update on 2026-03-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.