Jonathan Prostak, MD
NPI 1235229105 · Internal Medicine Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Prostak, MD is a Internal Medicine Physician provider in Ann Arbor, MI (NPI 1235229105).
Provider details
- NPI number
- 1235229105
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 236840 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
345 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 103 | $117 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 75 | $79 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 46 | $96 |
| 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 | 44 | $16 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 27 | $174 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 62 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 149 | 68 |
| Empagliflozinbrand: Jardiance | 92 | 30 |
| Losartan Potassium | 92 | 49 |
| Amlodipine Besylate | 83 | 42 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 70 | 21 |
| Metformin Hcl | 66 | 26 |
Practice location
Mailing address
Additional practice locations (2)
- 2799 W Grand BlvdDetroit, MI 48202-2608Phone: (800) 653-6568Fax: (313) 876-1305
- Weiler - Dept. of Medicine1825 Eastchester RoadBronx, NY 10461Phone: (718) 904-2400
Registry dates
- Enumerated
- 2006-10-13
- Last updated
- 2025-10-28
- Certified
- 2025-10-28
Frequently asked questions
- What is Jonathan Prostak's NPI number?
- Jonathan Prostak's National Provider Identifier (NPI) is 1235229105, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Prostak's specialty?
- Jonathan Prostak is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Prostak located?
- Jonathan Prostak's practice location on file with NPPES is 1500 E Medical Center Dr, Ann Arbor, MI 48109-5000.
- What is Jonathan Prostak's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Prostak is (734) 936-4000.
- Does Jonathan Prostak accept Medicare?
- Jonathan Prostak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Prostak's NPI active?
- Yes — Jonathan Prostak's NPI (1235229105) is active in the NPPES registry as of the last update on 2025-10-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.