Mark K. Chelmowski, MD
Internal Medicine Physician · Milwaukee, WI
Mark K. Chelmowski, MD is an internal medicine physician with a practice address in Milwaukee, Wisconsin, and NPI 1659306041, issued on Jul 12, 2006. Check the license (Wisconsin 27584, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mark K. Chelmowski
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 27584 WI
Self-reported in NPPES; status is on the state search - Practice location
- 3003 W Good Hope Road, Milwaukee, WI 53209
- Phone
- (414) 352-3100
- Enumerated
- Jul 12, 2006
- Record last updated
- Dec 16, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (414) 247-4597
- Medicaid ID
- 31365200 WI
- Medicare enrollment
- Enrolled (PECOS I20080124000506); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 3003 W Good Hope Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Huong Dangvu, MDInternal Medicine Physician1861423261
- Larry Dean, MDInternal Medicine Physician1538191770
Verify Mark K. Chelmowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 27584Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,595 Medicare Part D claims for 216 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 12 claims were for opioids.
Most prescribed
- Atorvastatin Calcium184 claims
- Amlodipine Besylate83 claims
- Losartan Potassium76 claims
- Losartan-Hydrochlorothiazide53 claims
- Metformin Hcl44 claims
- Simvastatin39 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 one group practice
- Aurora Advanced Healthcare, Inc.Mequon, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark K. Chelmowski among 2,078 internal medicine physician records in Wisconsin
Mark K. Chelmowski, MD is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 46% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1985 · median 2002 among the 1,098 with a school on file
- Record last updated2021 · 55% 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 Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
382 internal medicine physician records list a practice address in Milwaukee
They are 382 of the 18,389 NPPES records with a practice address in Milwaukee, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Milwaukee → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jeffrey Bahr, M.D.Milwaukee, WI 532091770511453
- Myron Bodnar, MDMilwaukee, WI 532091568493054
- Kristine Bruno, MDMilwaukee, WI 532091689606816
- John Bryant, MDMilwaukee, WI 532091275565418
- Huong Dangvu, MDMilwaukee, WI 532091861423261
- Larry Dean, MDMilwaukee, WI 532091538191770
- Paul Halstrom, MDMenomonee Falls, WI 532091740212984
- Jeffrey Katt, MDMilwaukee, WI 532091407887821
Common questions
What is Mark K. Chelmowski, MD's NPI number?
Mark K. Chelmowski, MD's National Provider Identifier (NPI) is 1659306041, issued on Jul 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark K. Chelmowski, MD located?
The NPPES record lists a practice address at 3003 W Good Hope Road, Milwaukee, WI, 53209. Phone: (414) 352-3100. Providers update this record themselves, so call before visiting.
How can I verify Mark K. Chelmowski, MD's license?
NPPES lists Wisconsin license number 27584, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark K. Chelmowski, MD prescribe under Medicare Part D?
In 2024, Mark K. Chelmowski, MD had 1,595 Medicare Part D claims for 216 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.