Mark Vanhandel
NPI 1477678621 · Internal Medicine Physician · Martinez, CA
Enrolled with Medicare as Order and Referring Only - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Vanhandel is a Internal Medicine Physician provider in Martinez, CA (NPI 1477678621).
Provider details
- NPI number
- 1477678621
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- G79117 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 153 | 39 |
| Rizatriptan Benzoatebrand: Rizatriptan | 108 | 27 |
| Sumatriptan Succinate | 100 | 18 |
| Topiramate | 80 | 22 |
| Donepezil Hcl | 57 | 19 |
| Lamotrigine | 56 | — |
| Carbidopa/Levodopabrand: Carbidopa-Levodopa Er | 54 | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$149 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-20
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Vanhandel's NPI number?
- Mark Vanhandel's National Provider Identifier (NPI) is 1477678621, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Vanhandel's specialty?
- Mark Vanhandel is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Vanhandel located?
- Mark Vanhandel's practice location on file with NPPES is 2500 Alhambra Ave, Martinez, CA 94553-3156.
- What is Mark Vanhandel's phone number?
- The practice phone number listed in the NPPES registry for Mark Vanhandel is (925) 370-5110.
- Does Mark Vanhandel accept Medicare?
- Mark Vanhandel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Vanhandel's NPI active?
- Yes — Mark Vanhandel's NPI (1477678621) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.