Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Dr. Mark D Castellani, MD

Individual provider Clinical Cardiac Electrophysiology Physician · NPI 1598763542

Dr. Mark D Castellani, MD is registered under Cardiovascular Disease (Cardiology) in Lansing, Michigan. Graduated from Wayne State University School of Medicine in 1988, 38 years ago. Practices with Edward W Sparrow Hospital Association, a 694-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
38
Trained at
Wayne State University School of Medicine
Licensed in
MI
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1140 E Michigan Ave Ste 400
Lansing, MI 48912-1806
Phone: (517) 364-9650
Fax: (517) 364-9605
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Cardiac Electrophysiology Physician (primary) Taxonomy 207RC0001X · Licence 4301052699 (MI)

Record details

NPI number1598763542
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 13, 2005
Last updated in NPPESJune 17, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolWAYNE STATE UNIVERSITY SCHOOL OF MEDICINE
Graduated 1988 (38 years in practice)
Group practice Edward W Sparrow Hospital Association — 694 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations9 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,747
Services billed 2,747 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $21 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Edward W Sparrow Hospital Association

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 694 clinicians in the practice; 12 are shown here.

Other providers in Lansing