Dr. Mark J. Schaefer, MD
- Medicare services, 2024
- 12
- Medicare patients, 2024
- 104
- Part D claims, 2016
- 18
- Hospital affiliations
- 2
- Industry payments
- $20
- Practice address
- 8901 W Lincoln Ave, West Allis, WI 53227
- Practice phone
- Call (414) 328-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Schaefer'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. Mark J. Schaefer is an anesthesiologist in Milwaukee, Wisconsin
Dr. Schaefer practices at Aurora West Allis Medical Center in West Allis, Wisconsin, part of Advocate Health.
Dr. Schaefer's NPI, 1629052428, was assigned on December 5, 2005. Dr. Schaefer graduated from Medical College of Wisconsin in 1989. Dr. Schaefer holds Wisconsin license 31911-020.
- NPI
- 1629052428NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9234110248
- NPI enumeration date
- December 5, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (414) 328-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark J. Schaefer practices at Aurora West Allis Medical Center in West Allis, Wisconsin
Dr. Schaefer's primary practice is Aurora West Allis Medical Center, at 8901 W Lincoln Ave, West Allis, WI 53227 in Milwaukee County. The practice phone is (414) 328-6000.
- Aurora West Allis Medical Center8901 W Lincoln Ave, West Allis, WI 53227 · Milwaukee CountyPhone(414) 328-6000
Source: Dmand AI Affiliation Data
Dr. Mark J. Schaefer is affiliated with 3 sites of care and 2 medical groups
Dr. Schaefer's primary practice is Aurora West Allis Medical Center in West Allis, Wisconsin, part of Advocate Health. Dr. Schaefer is also affiliated with Select Specialty Hospital - Milwaukee - West Allis. The medical group on file is Aurora Medical Group. Dmand AI also links Dr. Schaefer to 1 more hospital outpatient department 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. Mark J. Schaefer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Schaefer practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Aurora West Allis Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark J. Schaefer is one of 1,001 anesthesiologists in Wisconsin
Anesthesiology is Dr. Schaefer's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Schaefer is licensed in Wisconsin.
Specialties and state licenses
- Anesthesiology, WisconsinPrimary
Anesthesiologists near Dr. Schaefer
Counts of anesthesiologists 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. Mark J. Schaefer billed Medicare for 12 services in 2024
CMS data shows 12 Medicare services from Dr. Schaefer across 1 procedure code in 2024, for 104 Medicare patients. Medicare paid $460 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Schaefer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 122024: 12No change
Dr. Schaefer compared with the Wisconsin median for anesthesiologists, 2024
- Dr. Schaefer
- Wisconsin median
- Medicare services
- 12vs 4875% below
- Medicare patients
- 104vs 11913% below
- Part D claims
- 18vs 2836% below
Medians across 995 anesthesiologists in Wisconsin with Dmand AI profiles that report each measure.
Dr. Schaefer'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Schaefer and other anesthesiologists in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark J. Schaefer treated 104 Medicare patients in 2024, average age 72
CMS counts 104 Medicare patients who saw Dr. Schaefer in 2024. The largest group is 65 to 74, with 53 patients. 69% of them have high blood pressure, and 65% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.56, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Schaefer's median patient age at 64, with 61% women.
Dr. Schaefer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Schaefer's Medicare patients by sex, 2024
- Women7168%
- Men3332%
Chronic conditions among Dr. Schaefer's Medicare patients, 2024
- High blood pressure69%
- High cholesterol65%
- Arthritis55%
- Chronic kidney disease33%
- Diabetes29%
- Ischemic heart disease28%
- Anxiety26%
- Cancer23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Schaefer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women61%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark J. Schaefer wrote 18 Medicare Part D claims in 2016
In 2016, Dr. Schaefer wrote 18 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $180 in total drug cost.
Dr. Schaefer's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Mark J. Schaefer takes part in Medicare
Dr. Schaefer 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)
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Dr. Mark J. Schaefer received $20 in industry payments in 2023
CMS Open Payments shows 1 general payment to Dr. Schaefer from 1 drug or device company in 2023. Education make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $20.
Companies that paid Dr. Schaefer the most, 2023 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark J. Schaefer graduated from Medical College of Wisconsin
Dr. Schaefer graduated from Medical College of Wisconsin in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark J. Schaefer'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) |
| 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. Mark J. Schaefer
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. Mark J. Schaefer's NPI number?
Dr. Mark J. Schaefer's NPI number is 1629052428. It was assigned on December 5, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark J. Schaefer?
Dr. Mark J. Schaefer is an anesthesiologist in Milwaukee, Wisconsin. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Mark J. Schaefer practice?
Dr. Schaefer practices at 8901 W Lincoln Ave, West Allis, WI 53227. Dr. Schaefer's primary practice is Aurora West Allis Medical Center in West Allis, Wisconsin, part of Advocate Health. Dmand AI also links Dr. Schaefer to 1 hospital outpatient department and 1 medical group.
What is Dr. Mark J. Schaefer's office phone number?
The practice phone on file for Dr. Schaefer is (414) 328-6000.
What is Dr. Mark J. Schaefer's medical license number?
Dr. Schaefer holds Wisconsin license 31911-020.
Which hospitals is Dr. Mark J. Schaefer affiliated with?
Dr. Schaefer practices at Aurora West Allis Medical Center in West Allis, Wisconsin. Dr. Schaefer is also affiliated with Select Specialty Hospital - Milwaukee - West Allis.
What medical group is Dr. Mark J. Schaefer part of?
Dr. Schaefer is linked to Aurora Medical Group. Dmand AI links Dr. Schaefer to 1 more medical group.
Does Dr. Mark J. Schaefer accept Medicare?
Yes. CMS data shows Dr. Schaefer billed Medicare for 12 services in 2024, and Dr. Schaefer accepts Medicare assignment.
How many Medicare patients does Dr. Mark J. Schaefer see?
CMS counts 104 Medicare patients who saw Dr. Schaefer in 2024, with an average age of 72.
What services does Dr. Mark J. Schaefer bill to Medicare?
In 2024, Dr. Schaefer's most billed Medicare services were anesthesia (00811).
Show 4 more questionsShow fewer questions
Where did Dr. Mark J. Schaefer go to medical school?
Dr. Schaefer graduated from Medical College of Wisconsin in 1989.
What drugs does Dr. Mark J. Schaefer prescribe most?
In 2016 Medicare Part D data, Dr. Schaefer's most prescribed drugs by claims were Tramadol HCl.
Has Dr. Mark J. Schaefer received payments from drug or device companies?
CMS Open Payments shows $20 in general payments to Dr. Schaefer from 1 company from 2023 to 2023. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Mark J. Schaefer been practicing?
Dr. Schaefer graduated from medical school in 1989, 37 years ago.
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