William Sandeno, M.D.
NPI 1538167531 · Internal Medicine Physician · Bellingham, WA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Sandeno, M.D. is a Internal Medicine Physician provider in Bellingham, WA (NPI 1538167531).
Provider details
- NPI number
- 1538167531
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD00037177 (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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,300 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 | 874 | $127 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 577 | $16 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 227 | $129 |
| Hemoglobin A1c Level83036 | 136 | $10 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 129 | $178 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 118 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 585 | 174 |
| Losartan Potassium | 398 | 127 |
| Omeprazole | 342 | 112 |
| Amlodipine Besylate | 335 | 105 |
| Lisinopril | 303 | 94 |
| Metoprolol Succinate | 253 | 81 |
| Levothyroxine Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-13
- Last updated
- 2015-08-21
Frequently asked questions
- What is William Sandeno's NPI number?
- William Sandeno's National Provider Identifier (NPI) is 1538167531, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Sandeno's specialty?
- William Sandeno is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Sandeno located?
- William Sandeno's practice location on file with NPPES is 4545 Cordata Pkwy, Bellingham, WA 98226-7263.
- What is William Sandeno's phone number?
- The practice phone number listed in the NPPES registry for William Sandeno is (360) 738-2200.
- Does William Sandeno accept Medicare?
- William Sandeno is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Sandeno's NPI active?
- Yes — William Sandeno's NPI (1538167531) is active in the NPPES registry as of the last update on 2015-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.