William Anderson, M.D.
NPI 1629031752 · Allergy & Immunology Physician · Bellingham, WA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Anderson, M.D. is a Allergy & Immunology Physician provider in Bellingham, WA (NPI 1629031752).
Provider details
- NPI number
- 1629031752
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD00031780 (WA)
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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
536 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) |
|---|---|---|
| Test for Allergy Using Allergenic Extract95004 | 274 | $4 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 76 | $128 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 61 | $166 |
| Gammaglobulin (immune System Protein) Measurement82784 | 41 | $8 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 23 | $8 |
| Test to Measure Rate of Airflow94375 | 18 | $39 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Montelukast Sodium | 52 | 19 |
| Prednisone | 50 | 27 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 44 | 25 |
| Fluticasone Propion/Salmeterolbrand: Fluticasone-Salmeterol | 38 | 17 |
| Budesonide/Formoterol Fumaratebrand: Symbicort | 37 | — |
| Fluticasone Propionate | 32 | 21 |
Practice location
Mailing address
Additional practice locations (2)
- 4545 Cordata Pkwy Ste 1cBellingham, WA 98226Phone: (360) 738-2200Fax: (360) 752-5689
- 9709 3rd Ave NeSeattle, WA 98115-2062Phone: (206) 329-1760
Registry dates
- Enumerated
- 2006-04-10
- Last updated
- 2025-07-14
- Certified
- 2025-07-14
Frequently asked questions
- What is William Anderson's NPI number?
- William Anderson's National Provider Identifier (NPI) is 1629031752, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Anderson's specialty?
- William Anderson is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is William Anderson located?
- William Anderson's practice location on file with NPPES is 3130 Ellis St, Bellingham, WA 98225-1904.
- What is William Anderson's phone number?
- The practice phone number listed in the NPPES registry for William Anderson is (425) 339-5412.
- Does William Anderson accept Medicare?
- William Anderson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Anderson's NPI active?
- Yes — William Anderson's NPI (1629031752) is active in the NPPES registry as of the last update on 2025-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.