Douglas Hempel, M.D.
Rheumatology Physician · Waukesha, WI
Douglas Hempel, M.D. is a rheumatology physician with a practice address in Waukesha, Wisconsin, and NPI 1164423844, issued on Aug 3, 2005. Check the license (Wisconsin 42869, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Douglas Hempel
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 42869 WI
Self-reported in NPPES; status is on the state search - Practice location
- 20800 Swenson Dr Ste 175, Waukesha, WI 53186
- Phone
- (262) 785-0777
- Enumerated
- Aug 3, 2005
- Record last updated
- Dec 30, 2025
- Fax
- (262) 785-0610
- Medicaid ID
- 32805700 WI
- Medicare enrollment
- Enrolled (PECOS I20101122000156); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1998
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 154 in Wisconsin → Look up another NPI →
Also registered at 20800 Swenson Dr Ste 175
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Pearson, M.D.Rheumatology Physician1407857048
- Kathleen Pugh, NPAdult Health Nurse Practitioner1164978581
- Ryan Schrader, P.A.Physician Assistant1932337912
- Juliana Shah, APNPAdult Health Nurse Practitioner1407211287
- Carly Skamra, M.D.Rheumatology Physician1275670275
Verify Douglas Hempel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 42869Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.7 times the Medicare Part D claims of the average rheumatology physician in 2024
7,243 Medicare Part D claims for 972 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 328 claims were for opioids.
Most prescribed
- Prednisone1,347 claims
- Hydroxychloroquine Sulfate1,201 claims
- Methotrexate1,060 claims
- Allopurinol297 claims
- Folic Acid269 claims
- Gabapentin265 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: $198.60
10 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 4,486 providers of this specialty with any payment received $8,538.33 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.
Bills Medicare through one group practice
- West Suburban Ctr For ArthritisWaukesha, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Douglas Hempel among 154 rheumatology physician records in Wisconsin
Douglas Hempel, M.D. is one of 154 rheumatology physician records with a practice address in Wisconsin. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1998 · median 2004 among the 97 with a school on file
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Wisconsin
There are 154 rheumatology physician records in Wisconsin.
All 154 in Wisconsin → Every provider in Waukesha → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Mark Pearson, M.D.Waukesha, WI 531861407857048
- Carly Skamra, M.D.Waukesha, WI 531861275670275
- Iryna Nemesh, M.D.Waterford, WI 531851942694401
- Joseph Bretza, M.D.Milwaukee, WI 532091114958394
- Robina Chowdhery, MDPleasant Prairie, WI 531581881803658
- Allan Goldman, M.D.Milwaukee, WI 532151932162658
- Daniel Rosler, M.D.Milwaukee, WI 532151134124159
- John Albert, MDGlendale, WI 532171861428070
Common questions
What is Douglas Hempel, M.D.'s NPI number?
Douglas Hempel, M.D.'s National Provider Identifier (NPI) is 1164423844, issued on Aug 3, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Douglas Hempel, M.D. located?
The NPPES record lists a practice address at 20800 Swenson Dr Ste 175, Waukesha, WI, 53186. Phone: (262) 785-0777. Providers update this record themselves, so call before visiting.
How can I verify Douglas Hempel, M.D.'s license?
NPPES lists Wisconsin license number 42869, 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 Douglas Hempel, M.D. prescribe under Medicare Part D?
In 2024, Douglas Hempel, M.D. had 7,243 Medicare Part D claims for 972 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.