Peggy Wu, M.D.
NPI 1366608259 · Rheumatology Physician · Worcester, MA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peggy Wu, M.D. is a Rheumatology Physician provider in Worcester, MA (NPI 1366608259).
Provider details
- NPI number
- 1366608259
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 253058 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
382 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 186 | $98 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 83 | $69 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 38 | $132 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 36 | $144 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 24 | $53 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 230 | 73 |
| Methotrexate Sodiumbrand: Methotrexate | 141 | 38 |
| Hydroxychloroquine Sulfate | 109 | 35 |
| Etanerceptbrand: Enbrel Sureclick | 107 | 15 |
| Adalimumabbrand: Humira(cf) Pen | 90 | 11 |
| Allopurinol | 79 | 20 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-07-31
- Last updated
- 2023-01-12
- Certified
- 2023-01-12
Frequently asked questions
- What is Peggy Wu's NPI number?
- Peggy Wu's National Provider Identifier (NPI) is 1366608259, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peggy Wu's specialty?
- Peggy Wu is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Peggy Wu located?
- Peggy Wu's practice location on file with NPPES is 119 Belmont St, Worcester, MA 01605-2903.
- What is Peggy Wu's phone number?
- The practice phone number listed in the NPPES registry for Peggy Wu is (508) 334-5224.
- Does Peggy Wu accept Medicare?
- Peggy Wu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peggy Wu's NPI active?
- Yes — Peggy Wu's NPI (1366608259) is active in the NPPES registry as of the last update on 2023-01-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.