Robert Vanderzwaag, M.D.
NPI 1811996846 · Family Medicine Physician · Mishawaka, IN
Robert Vanderzwaag, M.D. is a Family Medicine Physician provider in Mishawaka, IN (NPI 1811996846).
Provider details
- NPI number
- 1811996846
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 01048973A (IN)
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
20 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 · 15 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Amlodipine Besylate | 33 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 31 |
| Alprazolam | 26 |
| Dextroamphetamine/Amphetaminebrand: Dextroamphetamine-Amphetamine | 23 |
| Losartan Potassium | 22 |
| Lisinopril | 22 |
| Atorvastatin Calcium | 18 |
| Rosuvastatin Calcium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$308 across 15 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
- 2005-07-20
- Last updated
- 2011-01-27
Frequently asked questions
- What is Robert Vanderzwaag's NPI number?
- Robert Vanderzwaag's National Provider Identifier (NPI) is 1811996846, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Vanderzwaag's specialty?
- Robert Vanderzwaag is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Vanderzwaag located?
- Robert Vanderzwaag's practice location on file with NPPES is 5314 Lincolnway East, Mishawaka, IN 46544-4249.
- What is Robert Vanderzwaag's phone number?
- The practice phone number listed in the NPPES registry for Robert Vanderzwaag is (574) 256-9032.
- Is Robert Vanderzwaag's NPI active?
- Yes — Robert Vanderzwaag's NPI (1811996846) is active in the NPPES registry as of the last update on 2011-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.