Michael Casmir Kowalczyk, DO
Internal Medicine Physician · Lansing, MI
Michael Casmir Kowalczyk, DO is an internal medicine physician with a practice address in Lansing, Michigan, and NPI 1649277211, issued on Jun 28, 2005. Check the license (Michigan MK010436, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Michael Casmir Kowalczyk
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MK010436 MI
Self-reported in NPPES; status is on the state search - Practice location
- 3955 Patient Care Dr Ste A, Lansing, MI 48911
- Phone
- (517) 374-7600
- Enumerated
- Jun 28, 2005
- Record last updated
- Mar 18, 2025
- Fax
- (885) 480-9150
- Medicaid ID
- 2901730-11 MI
- Medicare enrollment
- Enrolled (PECOS I20040722001237); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Osteopathic Medicine, 1988
- Entity
- Type 1 · individual
Also registered at 3955 Patient Care Dr Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shweta Bhatnagar, DOInternal Medicine Physician1366023830
- Hitesh Bhatt, D.OInternal Medicine Physician1477716579
- Annelise Bowman, NPFamily Nurse Practitioner1225871148
- Felix Chalu, NP-CNurse Practitioner1730686916
- Sarah Corgan, NPGerontology Nurse Practitioner1962157586
- Garrett Descoteaux-Friday, D.O.Internal Medicine Physician1922539717
Verify Michael Casmir Kowalczyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license MK010436Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.6 times the Medicare Part D claims of the average internal medicine physician in 2024
11,551 Medicare Part D claims for 927 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 832 claims were for opioids.
Most prescribed
- Atorvastatin Calcium516 claims
- Losartan Potassium410 claims
- Levothyroxine Sodium393 claims
- Amlodipine Besylate378 claims
- Hydrocodone-Acetaminophen363 claims
- Metoprolol Succinate298 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.
Industry payments in 2024: $957.98
47 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, 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.
2 hospitals and group practices
- Capital Internal Medicine Associates P.C.Lansing, MI
- Eaton Rapids Medical CenterEaton Rapids, MI · Critical Access Hospitals
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
135 internal medicine physician records list a practice address in Lansing
They are 135 of the 5,276 NPPES records with a practice address in Lansing, and 5,735 internal medicine physician records in Michigan.
All 135 in Lansing → All 5,735 in Michigan → Every provider in Lansing →
Other internal medicine physician records in Michigan
- Jamie Therese Abad, MDDetroit, MI1700573359
- Tomas Abalo, M.D.Iron Mountain, MI1336199975
- Ali Abbas, M.D.Pontiac, MI1972167526
- Sura Abbas, MDWarren, MI1801687405
- Ramzi Abbasi, MDSaginaw, MI1164270005
- Saadat Abbasi, MDKalamazoo, MI1912005596
- Shahzaman Abbasi, MDLansing, MI1376512111
- Youssef Abbiss, D.O.Mount Clemens, MI1982991881
- Valerie Abbott, MDSouthfield, MI1740289487
- Samer Abboud, MDSaginaw, MI1245804178
Common questions
What is Michael Casmir Kowalczyk, DO's NPI number?
Michael Casmir Kowalczyk, DO's National Provider Identifier (NPI) is 1649277211, issued on Jun 28, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Michael Casmir Kowalczyk, DO located?
The NPPES record lists a practice address at 3955 Patient Care Dr Ste A, Lansing, MI, 48911. Phone: (517) 374-7600. Providers update this record themselves, so call before visiting.
How can I verify Michael Casmir Kowalczyk, DO's license?
NPPES lists Michigan license number MK010436, 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 Michael Casmir Kowalczyk, DO prescribe under Medicare Part D?
In 2024, Michael Casmir Kowalczyk, DO had 11,551 Medicare Part D claims for 927 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.