Joseph A. Nicholas, M.D.
Family Medicine Physician · Greenfield, WI
Joseph A. Nicholas, M.D. is a family medicine physician with a practice address in Greenfield, Wisconsin, and NPI 1528094588, issued on Jun 23, 2006. Check the license (Wisconsin 49329-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Joseph A. Nicholas
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 49329-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 4448 W. Loomis RD., Greenfield, WI 53220
- Phone
- (414) 281-5150
- Enumerated
- Jun 23, 2006
- Record last updated
- Jun 25, 2025
- Fax
- (414) 281-5767
- Medicaid ID
- 34871200 WI
- Medicare enrollment
- Enrolled (PECOS I20060629000226); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 2003
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,765 in Wisconsin → Look up another NPI →
Also registered at 4448 W. Loomis RD.
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karen Hunnicutt, CRNACertified Registered Nurse Anesthetist1396838777
- Rita Schulz, M.D.Family Medicine Physician1083789820
- Venkata Thota, MDFamily Medicine Physician1134183783
Verify Joseph A. Nicholas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 49329-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.9 times the Medicare Part D claims of the average family medicine physician in 2024
10,413 Medicare Part D claims for 655 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 462 claims were for opioids.
Most prescribed
- Atorvastatin Calcium671 claims
- Amlodipine Besylate401 claims
- Pantoprazole Sodium291 claims
- Lisinopril288 claims
- Metoprolol Succinate278 claims
- Losartan Potassium272 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 2 group practices
- Aurora Medical Group, Inc.Milwaukee, WI
- Lakeshore Medical Clinic LLCGreenfield, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph A. Nicholas among 3,765 family medicine physician records in Wisconsin
Joseph A. Nicholas, M.D. is one of 3,765 family medicine physician records with a practice address in Wisconsin. 75% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 46% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2003 · median 2007 among the 2,347 with a school on file
- Record last updated2025 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
36 family medicine physician records list a practice address in Greenfield
They are 36 of the 961 NPPES records with a practice address in Greenfield, and 3,765 family medicine physician records in Wisconsin.
All 3,765 in Wisconsin → Every provider in Greenfield → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Chihab Bilal, MDMilwaukee, WI 532201275542961
- Nazih Botros, MDMilwaukee, WI 532201700895331
- William Dralle, MDGreenfield, WI 532201679652416
- Katherine Hoyer, MDMilwaukee, WI 532201932214822
- Barbara Hummel, MDGreenfield, WI 532201972519361
- Kathryn Kiyono, MDGreenfield, WI 532201083793954
- Konrad Krawczyk, M.D.Greenfield, WI 532201386619039
- Hany Mikhaeel, MDMilwaukee, WI 532201194773796
Common questions
What is Joseph A. Nicholas, M.D.'s NPI number?
Joseph A. Nicholas, M.D.'s National Provider Identifier (NPI) is 1528094588, issued on Jun 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph A. Nicholas, M.D. located?
The NPPES record lists a practice address at 4448 W. Loomis RD., Greenfield, WI, 53220. Phone: (414) 281-5150. Providers update this record themselves, so call before visiting.
How can I verify Joseph A. Nicholas, M.D.'s license?
NPPES lists Wisconsin license number 49329-020, 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 Joseph A. Nicholas, M.D. prescribe under Medicare Part D?
In 2024, Joseph A. Nicholas, M.D. had 10,413 Medicare Part D claims for 655 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.