Sean Zager, MD
NPI 1437355898 · Family Medicine Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sean Zager, MD is a Family Medicine Physician provider in Ann Arbor, MI (NPI 1437355898).
Provider details
- NPI number
- 1437355898
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
364 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) |
|---|---|---|
| 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 | 129 | $16 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 112 | $180 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 52 | $129 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 30 | $130 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 29 | $19 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 55 | 15 |
| Rosuvastatin Calcium | 37 | 11 |
| Amlodipine Besylate | 28 | — |
| Atorvastatin Calcium | 28 | — |
| Thyroid,porkbrand: NP Thyroid | 22 | — |
| Lisinopril | 22 | — |
| Levothyroxine Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$600 across 1 record (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
Additional practice locations (1)
- 2395 Lombard StSan Francisco, CA 94123-2601Phone: (415) 796-2242
Registry dates
- Enumerated
- 2007-06-22
- Last updated
- 2022-07-07
- Certified
- 2022-07-07
Frequently asked questions
- What is Sean Zager's NPI number?
- Sean Zager's National Provider Identifier (NPI) is 1437355898, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sean Zager's specialty?
- Sean Zager is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sean Zager located?
- Sean Zager's practice location on file with NPPES is 4200 Whitehall Dr Ste 150, Ann Arbor, MI 48105-9694.
- What is Sean Zager's phone number?
- The practice phone number listed in the NPPES registry for Sean Zager is (734) 995-0308.
- Does Sean Zager accept Medicare?
- Sean Zager is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sean Zager's NPI active?
- Yes — Sean Zager's NPI (1437355898) is active in the NPPES registry as of the last update on 2022-07-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.