Aaron Thomas Byczynski
Internal Medicine Physician · Milwaukee, WI
Aaron Thomas Byczynski is an internal medicine physician with a practice address in Milwaukee, Wisconsin, and NPI 1457054942, issued on Mar 23, 2023. Check the license (Wisconsin 81699, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Aaron Thomas Byczynski
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 81699 WI
Self-reported in NPPES; status is on the state search - Practice location
- 945 N 12TH St, Milwaukee, WI 53233
- Phone
- (414) 219-2000
- Enumerated
- Mar 23, 2023
- Record last updated
- Jul 24, 2026
- Medicaid ID
- 100257950 WI
- Medicare enrollment
- Enrolled (PECOS I20260505000150); may accept Medicare assignment
- Medical or professional school
- West Virginia School Of Osteopathic Medicine, 2023
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 945 N 12TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mohammad Abdul AzeemNeurology Physician1295229797
- Ibrahim Abu-ArqoubPharmacist1033539390
- Stephanie Adamczyk, PAPhysician Assistant1063007441
- Shant Adamian, DOObstetrics & Gynecology Physician1952861668
- Ola AhmadStudent in an Organized Health Care Education/Training Program1629871645
Verify Aaron Thomas Byczynski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 81699Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
32 Medicare Part D claims for 13 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Aaron Thomas Byczynski among 2,078 internal medicine physician records in Wisconsin
Aaron Thomas Byczynski 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 2023, is newer than 92% of them.
- NPI issued2023 · 92% of these records are older, 6% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2023 · median 2002 among the 1,098 with a school on file
- Record last updated2026 · 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
- Ruric (andy) Anderson, MDMilwaukee, WI 532331205995255
- Robin Brown, M.D.Milwaukee, WI 532331881776458
- Carolina Conti, M.D.Milwaukee, WI 532331750340766
- Ellen Danto-Nocton, M.D.Milwaukee, WI 532331265440002
- Mark Gennis, MDMilwaukee, WI 532331164570644
- Thomas Jackson, MDMilwaukee, WI 532331629186242
- Manuel Joseph, MDMilwaukee, WI 532331447391123
- Ariba Khan, MDMilwaukee, WI 532331891802328
Common questions
What is Aaron Thomas Byczynski's NPI number?
Aaron Thomas Byczynski's National Provider Identifier (NPI) is 1457054942, issued on Mar 23, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Thomas Byczynski located?
The NPPES record lists a practice address at 945 N 12TH St, Milwaukee, WI, 53233. Phone: (414) 219-2000. Providers update this record themselves, so call before visiting.
How can I verify Aaron Thomas Byczynski's license?
NPPES lists Wisconsin license number 81699, 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 Aaron Thomas Byczynski prescribe under Medicare Part D?
In 2024, Aaron Thomas Byczynski had 32 Medicare Part D claims for 13 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.