Dr. Douglas J. Hempel, MD
- Medicare services, 2024
- 125,776
- Medicare patients, 2024
- 655
- Part D claims, 2024
- 7,243
- Hospital affiliations
- 2
- Industry payments
- $1,546
- Practice address
- 601 N Barker Rd, Brookfield, WI 53045
- Practice phone
- Call (262) 785-0777
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
West Suburban Ctr for Arthritis
Brookfield, Wisconsin
Find Dr. Hempel's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Douglas J. Hempel is a rheumatologist in Brookfield, Wisconsin
Dr. Hempel practices at West Suburban Ctr for Arthritis in Brookfield, Wisconsin.
Dr. Hempel's NPI, 1164423844, was assigned on August 3, 2005. Dr. Hempel graduated from Medical College of Wisconsin in 1998. Dr. Hempel holds Wisconsin license 42869.
- NPI
- 1164423844NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1355537002
- NPI enumeration date
- August 3, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (262) 785-0777
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Douglas J. Hempel practices at West Suburban Ctr for Arthritis in Brookfield, Wisconsin
Dr. Hempel's primary practice is West Suburban Ctr for Arthritis, at 601 N Barker Rd, Brookfield, WI 53045 in Waukesha County. The practice phone is (262) 785-0777.
- West Suburban Ctr for Arthritis601 N Barker Rd, Brookfield, WI 53045 · Waukesha CountyPhone(262) 785-0777
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Douglas J. Hempel is affiliated with 4 sites of care and 1 medical group
Dr. Hempel's primary practice is West Suburban Ctr for Arthritis in Brookfield, Wisconsin. Dr. Hempel is also affiliated with ProHealth Waukesha Memorial Hospital. The medical group on file is West Suburban Center for Arthritis. Dmand AI also links Dr. Hempel to 1 more hospital and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Douglas J. Hempel's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hempel practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| West Suburban Ctr for Arthritis | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Douglas J. Hempel is one of 138 rheumatologists in Wisconsin
Rheumatology is Dr. Hempel's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Hempel is licensed in Wisconsin.
Specialties and state licenses
- Rheumatology, WisconsinPrimary
Rheumatologists near Dr. Hempel
Counts of rheumatologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Douglas J. Hempel billed Medicare for 125,776 services in 2024
CMS data shows 125,776 Medicare services from Dr. Hempel across 44 procedure codes in 2024, for 655 Medicare patients. Medicare paid $1,596,429 for them. Every service was in an office.
Dr. Hempel's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 129,4182024: 109,19616%
- Lab and pathology
- 2023: 10,9432024: 12,01410%
- Surgery
- 2023: 1,5222024: 1,5452%
- Office and hospital visits
- 2023: 1,0402024: 1,1097%
- Tests and treatments
- 2023: 1,0332024: 90013%
- Other services
- 2023: 02024: 863
- Imaging
- 2023: 962024: 14955%
Dr. Hempel compared with the Wisconsin median for rheumatologists, 2024
- Dr. Hempel
- Wisconsin median
- Medicare services
- 125,776vs 514244.7 times
- Medicare patients
- 655vs 1993.3 times
- Part D claims
- 6,987vs 1,0406.7 times
Medians across 143 rheumatologists in Wisconsin with Dmand AI profiles that report each measure.
Dr. Hempel's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Hempel?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hempel and other rheumatologists in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Douglas J. Hempel treated 655 Medicare patients in 2024, average age 73
CMS counts 655 Medicare patients who saw Dr. Hempel in 2024. The largest group is 65 to 74, with 344 patients. 75% of them have arthritis, and 71% have high blood pressure. 5% are also on Medicaid. Their average risk score is 1.30, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hempel's median patient age at 68, with 69% women.
Dr. Hempel's Medicare patients by age, 2024
Dr. Hempel's Medicare patients by sex, 2024
- Women42465%
- Men23135%
Chronic conditions among Dr. Hempel's Medicare patients, 2024
- Arthritis75%
- High blood pressure71%
- High cholesterol71%
- Osteoporosis32%
- Chronic kidney disease27%
- Mood disorders26%
- Ischemic heart disease25%
- Depression23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hempel's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women69%
- Men30%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Douglas J. Hempel wrote 7,243 Medicare Part D claims in 2024
In 2024, Dr. Hempel wrote 7,243 Medicare Part D claims for 972 patients. 88% of them were for generic drugs. CMS names the drug for 6,987 of them, across 54 drugs with 11 or more claims each, at $3,519,463 in total drug cost. In 2023, CMS named 5,875 claims across 48 drugs.
Dr. Hempel's Part D claims by kind of drug, 2024
- Generic6,401 claims88%
- Brand-name812 claims11%
- Other30 claims0%
Dr. Hempel's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Hempel's Part D claims, 2024
- Opioids5%328 of 7,243 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5,8752024: 6,98719%
Drugs named by CMS: 54 in 2024, 48 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Douglas J. Hempel takes part in Medicare
Dr. Hempel accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Douglas J. Hempel received $1,546 in industry payments from 2016 to 2025
CMS Open Payments shows 96 general payments to Dr. Hempel from 14 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $800.
General payments to Dr. Hempel by program year, 2016 to 2025
Companies that paid Dr. Hempel the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Douglas J. Hempel graduated from Medical College of Wisconsin
Dr. Hempel graduated from Medical College of Wisconsin in 1998.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Douglas J. Hempel's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Douglas J. Hempel
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Douglas J. Hempel's NPI number?
Dr. Douglas J. Hempel's NPI number is 1164423844. It was assigned on August 3, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Douglas J. Hempel?
Dr. Douglas J. Hempel is a rheumatologist in Brookfield, Wisconsin. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Douglas J. Hempel practice?
Dr. Hempel practices at 601 N Barker Rd, Brookfield, WI 53045. Dr. Hempel's primary practice is West Suburban Ctr for Arthritis in Brookfield, Wisconsin. Dmand AI also links Dr. Hempel to 1 hospital and 1 group practice or clinic.
What is Dr. Douglas J. Hempel's office phone number?
The practice phone on file for Dr. Hempel is (262) 785-0777.
What is Dr. Douglas J. Hempel's medical license number?
Dr. Hempel holds Wisconsin license 42869.
Which hospitals is Dr. Douglas J. Hempel affiliated with?
Dr. Hempel is affiliated with ProHealth Waukesha Memorial Hospital. Dmand AI links Dr. Hempel to 1 more hospital.
What medical group is Dr. Douglas J. Hempel part of?
Dr. Hempel is linked to West Suburban Center for Arthritis.
Does Dr. Douglas J. Hempel accept Medicare?
Yes. CMS data shows Dr. Hempel billed Medicare for 125,776 services in 2024, and Dr. Hempel accepts Medicare assignment.
How many Medicare patients does Dr. Douglas J. Hempel see?
CMS counts 655 Medicare patients who saw Dr. Hempel in 2024, with an average age of 73.
What services does Dr. Douglas J. Hempel bill to Medicare?
In 2024, Dr. Hempel's most billed Medicare services were injected or infused drug (J1602), injected or infused drug (J3262) and injected or infused drug (J0129).
Show 4 more questionsShow fewer questions
Where did Dr. Douglas J. Hempel go to medical school?
Dr. Hempel graduated from Medical College of Wisconsin in 1998.
What drugs does Dr. Douglas J. Hempel prescribe most?
In 2024 Medicare Part D data, Dr. Hempel's most prescribed drugs by claims were Prednisone, Hydroxychloroquine Sulfate and Methotrexate.
Has Dr. Douglas J. Hempel received payments from drug or device companies?
CMS Open Payments shows $1,546 in general payments to Dr. Hempel from 14 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Douglas J. Hempel been practicing?
Dr. Hempel graduated from medical school in 1998, 28 years ago.
Selling to rheumatology practices?
See rheumatologists in Wisconsin by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card