Kerstyn Zalesin, MD
NPI 1285683821 · Internal Medicine Physician · Royal Oak, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kerstyn Zalesin, MD is a Internal Medicine Physician provider in Royal Oak, MI (NPI 1285683821).
Provider details
- NPI number
- 1285683821
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 4301065660 (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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
232 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 105 | $86 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 66 | $124 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 46 | $14 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 15 | $169 |
Typical Medicare-allowed amounts for these services range $14–$169 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Semaglutidebrand: Ozempic | 122 | 22 |
| Tirzepatidebrand: Mounjaro | 109 | 18 |
| Dulaglutidebrand: Trulicity | 55 | — |
| Omeprazole | 47 | 22 |
| Ursodiol | 25 | — |
| Metformin Hcl | 20 | — |
| Pantoprazole Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$69 across 3 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
Additional practice locations (1)
- 1555 South Blvd E Ste 360Rochester Hills, MI 48307-5759Phone: (248) 267-5750Fax: (248) 267-5751
Registry dates
- Enumerated
- 2006-05-10
- Last updated
- 2026-02-24
- Certified
- 2026-02-24
Frequently asked questions
- What is Kerstyn Zalesin's NPI number?
- Kerstyn Zalesin's National Provider Identifier (NPI) is 1285683821, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kerstyn Zalesin's specialty?
- Kerstyn Zalesin is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kerstyn Zalesin located?
- Kerstyn Zalesin's practice location on file with NPPES is 4949 Coolidge Hwy, Royal Oak, MI 48073-1026.
- What is Kerstyn Zalesin's phone number?
- The practice phone number listed in the NPPES registry for Kerstyn Zalesin is (248) 655-5900.
- Does Kerstyn Zalesin accept Medicare?
- Kerstyn Zalesin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kerstyn Zalesin's NPI active?
- Yes — Kerstyn Zalesin's NPI (1285683821) is active in the NPPES registry as of the last update on 2026-02-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.