Stuart Warnaar, MD
NPI 1245235472 · Internal Medicine Physician · Traverse City, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stuart Warnaar, MD is a Internal Medicine Physician provider in Traverse City, MI (NPI 1245235472).
Provider details
- NPI number
- 1245235472
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301045523 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
746 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 402 | $122 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 132 | $86 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 97 | $123 |
| Administration of Influenza Virus VaccineG0008 | 35 | $31 |
| Administration of Pneumococcal VaccineG0009 | 22 | $31 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 140 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 637 | 188 |
| Losartan Potassium | 480 | 127 |
| Amlodipine Besylate | 461 | 121 |
| Levothyroxine Sodium | 431 | 118 |
| Lisinopril | 317 | 91 |
| Simvastatin | 309 | 83 |
| Omeprazole | 294 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$248 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
- 2005-06-15
- Last updated
- 2024-09-05
- Certified
- 2024-09-05
Frequently asked questions
- What is Stuart Warnaar's NPI number?
- Stuart Warnaar's National Provider Identifier (NPI) is 1245235472, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stuart Warnaar's specialty?
- Stuart Warnaar is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stuart Warnaar located?
- Stuart Warnaar's practice location on file with NPPES is 5041 N Royal Dr, Traverse City, MI 49684-6986.
- What is Stuart Warnaar's phone number?
- The practice phone number listed in the NPPES registry for Stuart Warnaar is (231) 935-0600.
- Does Stuart Warnaar accept Medicare?
- Stuart Warnaar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stuart Warnaar's NPI active?
- Yes — Stuart Warnaar's NPI (1245235472) is active in the NPPES registry as of the last update on 2024-09-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.