Ronald James Zegerius, MD
Cardiovascular Disease Physician · Kalamazoo, MI
Ronald James Zegerius, MD is a cardiovascular disease physician with a practice address in Kalamazoo, Michigan, and NPI 1629053368, issued on Dec 14, 2005. Check the license (Michigan 4301034102, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Ronald James Zegerius
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 4301034102 MI
Self-reported in NPPES; status is on the state search - Practice location
- 601 John St, Kalamazoo, MI 49007
- Phone
- (269) 345-9606
- Enumerated
- Dec 14, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (269) 373-7095
- Medicaid ID
- 3520425 MI
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 860 in Michigan → Look up another NPI →
Also registered at 601 John St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Hussein Akl, MDInternal Medicine Physician1699757849
- Kwsai Al-Rahhal, MDSleep Medicine (Internal Medicine) Physician1639159247
Verify Ronald James Zegerius in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301034102Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
803 Medicare Part D claims for 217 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Metoprolol Succinate86 claims
- Eliquis81 claims
- Metoprolol Tartrate55 claims
- Atorvastatin Calcium44 claims
- Losartan Potassium41 claims
- Amlodipine Besylate34 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): 74.2 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).
Ronald James Zegerius among 860 cardiovascular disease physician records in Michigan
Ronald James Zegerius, MD is one of 860 cardiovascular disease physician records with a practice address in Michigan. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 80% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2026 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Michigan
There are 860 cardiovascular disease physician records in Michigan.
All 860 in Michigan → Every provider in Kalamazoo → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- David Burke, MDKalamazoo, MI 490071366428864
- Brett Eliuk, D.O.Kalamazoo, MI 490071871714915
- Atanas Iliev, D.O.Kalamazoo, MI 490071942612858
- Thomas Keller, M.D.Kalamazoo, MI 490071972523918
- Christopher Ombrello, M.D.Kalamazoo, MI 490071225096506
- Michael Pack, DOKalamazoo, MI 490071508822966
- Michael Pawlik, D.O.Kalamazoo, MI 490071043230071
- Benjamin Perry, MDKalamazoo, MI 490071235115734
Common questions
What is Ronald James Zegerius, MD's NPI number?
Ronald James Zegerius, MD's National Provider Identifier (NPI) is 1629053368, issued on Dec 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ronald James Zegerius, MD located?
The NPPES record lists a practice address at 601 John St, Kalamazoo, MI, 49007. Phone: (269) 345-9606. Providers update this record themselves, so call before visiting.
How can I verify Ronald James Zegerius, MD's license?
NPPES lists Michigan license number 4301034102, 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 Ronald James Zegerius, MD prescribe under Medicare Part D?
In 2024, Ronald James Zegerius, MD had 803 Medicare Part D claims for 217 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is Ronald James Zegerius, MD's MIPS final score?
The 2023 MIPS final score is 74.2 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.