David J. Kowalski, M.D.
Internal Medicine Physician · Effingham, IL
David J. Kowalski, M.D. is an internal medicine physician with a practice address in Effingham, Illinois, and NPI 1538194600, issued on Jul 11, 2006. Check the license (Illinois 036089116, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- David J. Kowalski
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036089116 IL
Self-reported in NPPES; status is on the state search - Practice location
- 300 N Maple St, Effingham, IL 62401
- Phone
- (217) 342-4151
- Enumerated
- Jul 11, 2006
- Record last updated
- May 21, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (217) 342-9336
- Medicare enrollment
- Enrolled (PECOS I20050211000218); accepts Medicare assignment
- Medical or professional school
- Southern Illinois University School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 300 N Maple St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cheryl Beam, NPNurse Practitioner1346261872
- Vickie Bushur, FNP-BCFamily Nurse Practitioner1184710402
- Dara Diel, R.N.Registered Nurse1386854537
- Lauren Fifer, FNPFamily Nurse Practitioner1326982679
- Stephanie Flier, MHPSocial Worker1558859934
- Karla Hardiek, R.N.Registered Nurse1659581817
Verify David J. Kowalski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036089116Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.8 times the Medicare Part D claims of the average internal medicine physician in 2024
15,402 Medicare Part D claims for 726 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 523 claims were for opioids.
Most prescribed
- Amlodipine Besylate679 claims
- Lisinopril660 claims
- Atorvastatin Calcium616 claims
- Furosemide564 claims
- Levothyroxine Sodium496 claims
- Omeprazole412 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.
Bills Medicare through 3 group practices
- Marshall Clinic Effingham S CEffingham, IL
- Springfield Clinic, LLPEffingham, IL
- St Anthonys Memorial Hospital OF The Hospital Sisters OF The ThirdEffingham, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David J. Kowalski among 7,238 internal medicine physician records in Illinois
David J. Kowalski, M.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1996 · median 2003 among the 3,580 with a school on file
- Record last updated2020 · 47% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 internal medicine physician records list a practice address in Effingham
They are 10 of the 566 NPPES records with a practice address in Effingham, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Effingham → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Narinder Arora, M.D.Effingham, IL 624011477576924
- Navdip Arora, M.D.Effingham, IL 624011902117328
- Elene Awad, MD PHDEffingham, IL 624011477543601
- Gregory Bismack, M.D.Effingham, IL 624011619293149
- Thomas Heischmidt, M.D.Effingham, IL 624011396720983
- Rita Maldonado, M.D.Effingham, IL 624011154407039
- Jennifer Maneja, MDEffingham, IL 624011194775064
- Lalaine Ramirez-Hom, M.D.Effingham, IL 624011669408209
Common questions
What is David J. Kowalski, M.D.'s NPI number?
David J. Kowalski, M.D.'s National Provider Identifier (NPI) is 1538194600, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David J. Kowalski, M.D. located?
The NPPES record lists a practice address at 300 N Maple St, Effingham, IL, 62401. Phone: (217) 342-4151. Providers update this record themselves, so call before visiting.
How can I verify David J. Kowalski, M.D.'s license?
NPPES lists Illinois license number 036089116, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does David J. Kowalski, M.D. prescribe under Medicare Part D?
In 2024, David J. Kowalski, M.D. had 15,402 Medicare Part D claims for 726 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.