Kerstyn Zalesin, MD
Internal Medicine Physician · Royal Oak, MI
Kerstyn Zalesin, MD is an internal medicine physician with a practice address in Royal Oak, Michigan, and NPI 1285683821, issued on May 10, 2006. Check the license (Michigan 4301065660, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Kerstyn Zalesin
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301065660 MI
Self-reported in NPPES; status is on the state search - Practice location
- 4949 Coolidge Hwy, Royal Oak, MI 48073
- Phone
- (248) 655-5900
- Enumerated
- May 10, 2006
- Record last updated
- Feb 24, 2026
- Fax
- (248) 655-5901
- Medicare enrollment
- Enrolled (PECOS I20050601000434); may accept Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 4949 Coolidge Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Michael Alfonsi, MS, LAT, ATCAthletic Trainer1427553296
- Nahleh Ali, M.A., CCC-SLPSpeech-Language Pathologist1225504954
- Neal Alpiner, M.D.Physical Medicine & Rehabilitation Physician1881755544
- Richard AnanPhysical Therapist1942703400
- Marina Bacus, PT, DPTPhysical Therapist1598395782
Verify Kerstyn Zalesin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301065660Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average internal medicine physician in 2024
586 Medicare Part D claims for 98 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 54% of claims.
Most prescribed
- Ozempic122 claims
- Mounjaro109 claims
- Trulicity55 claims
- Omeprazole47 claims
- Ursodiol25 claims
- Metformin Hcl20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 81 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $68.70
3 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Kerstyn Zalesin among 5,735 internal medicine physician records in Michigan
Kerstyn Zalesin, MD is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1995 · median 2006 among the 3,564 with a school on file
- Record last updated2026 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
218 internal medicine physician records list a practice address in Royal Oak
They are 218 of the 3,887 NPPES records with a practice address in Royal Oak, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Royal Oak → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Shanu Agarwal, MDRoyal Oak, MI 480731992759302
- Michael BarnesRoyal Oak, MI 480731588633176
- Robin Ehrmann, MDRoyal Oak, MI 480731992788541
- Ali Farhat, MDRoyal Oak, MI 480731467411363
- Brent FullerRoyal Oak, MI 480731871552646
- Joseph James, MDRoyal Oak, MI 480731154398196
- Frederick Karoub, MDRoyal Oak, MI 480731679554562
- Carl Karoub, MDRoyal Oak, MI 480731063494706
Common questions
What is Kerstyn Zalesin, MD's NPI number?
Kerstyn Zalesin, MD's National Provider Identifier (NPI) is 1285683821, issued on May 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kerstyn Zalesin, MD located?
The NPPES record lists a practice address at 4949 Coolidge Hwy, Royal Oak, MI, 48073. Phone: (248) 655-5900. Providers update this record themselves, so call before visiting.
How can I verify Kerstyn Zalesin, MD's license?
NPPES lists Michigan license number 4301065660, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kerstyn Zalesin, MD prescribe under Medicare Part D?
In 2024, Kerstyn Zalesin, MD had 586 Medicare Part D claims for 98 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Kerstyn Zalesin, MD's MIPS final score?
The 2023 MIPS final score is 81 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.