William Vandalsem, M.D.
NPI 1316975816 · Diagnostic Radiology Physician · Newport Beach, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Vandalsem, M.D. is a Diagnostic Radiology Physician provider in Newport Beach, CA (NPI 1316975816).
Provider details
- NPI number
- 1316975816
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G62331 (CA)
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
19 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
7,219 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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 1,360 | $9 |
| X-Ray of Chest, 2 Views71046 | 526 | $11 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 495 | $89 |
| Ct Scan of Chest Without Contrast71250 | 378 | $53 |
| Ct Scan Head Or Brain Without Contrast70450 | 309 | $41 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 295 | $85 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methylprednisolone | 12 | 11 |
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
Registry dates
- Enumerated
- 2006-06-30
- Last updated
- 2007-12-12
Frequently asked questions
- What is William Vandalsem's NPI number?
- William Vandalsem's National Provider Identifier (NPI) is 1316975816, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Vandalsem's specialty?
- William Vandalsem is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Vandalsem located?
- William Vandalsem's practice location on file with NPPES is One Hoag Drive, Newport Beach, CA 92663-4162.
- What is William Vandalsem's phone number?
- The practice phone number listed in the NPPES registry for William Vandalsem is (949) 764-5570.
- Does William Vandalsem accept Medicare?
- William Vandalsem is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Vandalsem's NPI active?
- Yes — William Vandalsem's NPI (1316975816) is active in the NPPES registry as of the last update on 2007-12-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.