Dr. Douglas E. Marx, DO
- Medicare services, 2024
- 1,568
- Medicare patients, 2024
- 704
- Part D claims, 2024
- 4,421
- Hospital affiliations
- 2
- Industry payments
- $25
- Practice address
- 725 American Ave, Waukesha, WI 53188
- Practice phone
- Call (262) 928-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Marx'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 E. Marx is a family medicine physician in Waukesha, Wisconsin
Dr. Marx practices at ProHealth Waukesha Memorial Hospital in Waukesha, Wisconsin, part of ProHealth Care.
Dr. Marx's NPI, 1326011321, was assigned on February 9, 2006. Dr. Marx graduated from Midwestern University, Chicago College of Osteopathic Med in 1997. Dr. Marx holds Wisconsin license 40581.
- NPI
- 1326011321NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3971682451
- NPI enumeration date
- February 9, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (262) 928-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Douglas E. Marx practices at ProHealth Waukesha Memorial Hospital in Waukesha, Wisconsin
Dr. Marx's primary practice is ProHealth Waukesha Memorial Hospital, at 725 American Ave, Waukesha, WI 53188 in Waukesha County. The practice phone is (262) 928-1000.
- ProHealth Waukesha Memorial Hospital725 American Ave, Waukesha, WI 53188 · Waukesha CountyPhone(262) 928-1000
Source: Dmand AI Affiliation Data
Dr. Douglas E. Marx is affiliated with 4 sites of care and 2 medical groups
Dr. Marx's primary practice is ProHealth Waukesha Memorial Hospital in Waukesha, Wisconsin, part of ProHealth Care. Dr. Marx is also affiliated with ProHealth Oconomowoc Memorial Hospital. The medical group on file is Froedtert & the Medical College of Wisconsin Community Physicians. Dmand AI also links Dr. Marx to 1 more group practice or clinic, 1 home health agency and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Douglas E. Marx's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marx practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| ProHealth Waukesha Memorial Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Douglas E. Marx is one of 3,101 family medicine physicians in Wisconsin
Family medicine is Dr. Marx's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Marx is licensed in Wisconsin.
Specialties and state licenses
- Family medicine, WisconsinPrimary
Family medicine physicians near Dr. Marx
Counts of family medicine physicians 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 E. Marx billed Medicare for 1,568 services in 2024
CMS data shows 1,568 Medicare services from Dr. Marx across 11 procedure codes in 2024, for 704 Medicare patients. Medicare paid $102,016 for them. Every service was in an office.
Dr. Marx's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 10,2932024: 98790%
- Other services
- 2023: 6,7362024: 38794%
- Office and hospital visits
- 2023: 2592024: 19425%
Dr. Marx compared with the Wisconsin median for family medicine physicians, 2024
- Dr. Marx
- Wisconsin median
- Medicare services
- 1,568vs 2845.5 times
- Medicare patients
- 704vs 1415.0 times
- Part D claims
- 3,815vs 1,1063.4 times
Medians across 3,266 family medicine physicians in Wisconsin with Dmand AI profiles that report each measure.
Dr. Marx'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. Marx?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marx and other family medicine physicians in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Douglas E. Marx treated 704 Medicare patients in 2024, average age 73
CMS counts 704 Medicare patients who saw Dr. Marx in 2024. The largest group is 65 to 74, with 307 patients. 74% of them have high cholesterol, and 72% have high blood pressure. 16% are also on Medicaid. Their average risk score is 1.20, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Marx's median patient age at 57, with 45% women.
Dr. Marx's Medicare patients by age, 2024
Dr. Marx's Medicare patients by sex, 2024
- Women39656%
- Men30844%
Chronic conditions among Dr. Marx's Medicare patients, 2024
- High cholesterol74%
- High blood pressure72%
- Arthritis37%
- Diabetes30%
- Chronic kidney disease27%
- Mood disorders26%
- Anxiety25%
- Ischemic heart disease25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marx's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women45%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Douglas E. Marx wrote 4,421 Medicare Part D claims in 2024
In 2024, Dr. Marx wrote 4,421 Medicare Part D claims for 737 patients. 91% of them were for generic drugs. CMS names the drug for 3,815 of them, across 83 drugs with 11 or more claims each, at $171,870 in total drug cost. In 2023, CMS named 5,277 claims across 96 drugs.
Dr. Marx's Part D claims by kind of drug, 2024
- Generic4,006 claims91%
- Brand-name388 claims9%
- Other27 claims1%
Dr. Marx'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. Marx's Part D claims, 2024
- Opioids1%43 of 4,421 claims
- Antibiotics3%125 of 4,421 claims
- Antipsychotics, patients 65 and over0%14 of 4,421 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: 5,2772024: 3,81528%
Drugs named by CMS: 83 in 2024, 96 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
Dr. Douglas E. Marx offers telehealth to Medicare patients
Dr. Marx accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Marx as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Douglas E. Marx received $25 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Marx from 1 drug or device company in 2016. Education make up the largest share, 100% of the total. Teva Pharmaceuticals USA, Inc. paid the most, $25.
Companies that paid Dr. Marx the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Douglas E. Marx graduated from Midwestern University, Chicago College of Osteopathic Med
Dr. Marx graduated from Midwestern University, Chicago College of Osteopathic Med in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Douglas E. Marx'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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)Doctors and Clinicians Utilization Data (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 E. Marx
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 E. Marx's NPI number?
Dr. Douglas E. Marx's NPI number is 1326011321. It was assigned on February 9, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Douglas E. Marx?
Dr. Douglas E. Marx is a family medicine physician in Waukesha, Wisconsin. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Douglas E. Marx practice?
Dr. Marx practices at 725 American Ave, Waukesha, WI 53188. Dr. Marx's primary practice is ProHealth Waukesha Memorial Hospital in Waukesha, Wisconsin, part of ProHealth Care. Dmand AI also links Dr. Marx to 1 group practice or clinic, 1 home health agency and 1 medical group.
What is Dr. Douglas E. Marx's office phone number?
The practice phone on file for Dr. Marx is (262) 928-1000.
What is Dr. Douglas E. Marx's medical license number?
Dr. Marx holds Wisconsin license 40581.
Which hospitals is Dr. Douglas E. Marx affiliated with?
Dr. Marx practices at ProHealth Waukesha Memorial Hospital in Waukesha, Wisconsin. Dr. Marx is also affiliated with ProHealth Oconomowoc Memorial Hospital.
What medical group is Dr. Douglas E. Marx part of?
Dr. Marx is linked to Froedtert & the Medical College of Wisconsin Community Physicians. Dmand AI links Dr. Marx to 1 more medical group.
Does Dr. Douglas E. Marx accept Medicare?
Yes. CMS data shows Dr. Marx billed Medicare for 1,568 services in 2024, and Dr. Marx accepts Medicare assignment.
Does Dr. Douglas E. Marx offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Marx as offering telehealth services.
How many Medicare patients does Dr. Douglas E. Marx see?
CMS counts 704 Medicare patients who saw Dr. Marx in 2024, with an average age of 73.
Show 5 more questionsShow fewer questions
What services does Dr. Douglas E. Marx bill to Medicare?
In 2024, Dr. Marx's most billed Medicare services were vaccine or vaccine administration (90480), medical service (91322) and medicare service (G0008).
Where did Dr. Douglas E. Marx go to medical school?
Dr. Marx graduated from Midwestern University, Chicago College of Osteopathic Med in 1997.
What drugs does Dr. Douglas E. Marx prescribe most?
In 2024 Medicare Part D data, Dr. Marx's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Amlodipine Besylate.
Has Dr. Douglas E. Marx received payments from drug or device companies?
CMS Open Payments shows $25 in general payments to Dr. Marx from 1 company from 2016 to 2016. The largest total came from Teva Pharmaceuticals USA, Inc.
How long has Dr. Douglas E. Marx been practicing?
Dr. Marx graduated from medical school in 1997, 29 years ago.
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