West J Emerg Med
Chest TubesEducationEmergency Medicine
Dr. Mark David Schaefer, MD
NPI1043664022PAC ID1153658232
- Medicare services, 2024
- 511
- Medicare patients, 2024
- 471
- Part D claims, 2024
- 221
- Publications
- 1
- Hospital affiliations
- 2
- Practice address
- 1233 N 30th St, Billings, MT 59101
- Practice phone
- Call (406) 237-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St Vincent Healthcare
Billings, Montana
Find Dr. Schaefer's professional email, personal email and mobile number
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Dr. Mark David Schaefer is an emergency medicine physician in Billings, Montana
Dr. Schaefer practices at St Vincent Healthcare in Billings, Montana.
Dr. Schaefer's NPI, 1043664022, was assigned on April 15, 2016. Dr. Schaefer graduated from University Of Washington School Of Medicine in 2016. Dr. Schaefer holds Montana license 77136.
NPI and contact details
- NPI
- 1043664022NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1153658232
- NPI enumeration date
- April 15, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (406) 237-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark David Schaefer practices at St Vincent Healthcare in Billings, Montana
Dr. Schaefer's primary practice is St Vincent Healthcare, at 1233 N 30th St, Billings, MT 59101 in Yellowstone County. The practice phone is (406) 237-7000.
- St Vincent Healthcare1233 N 30th St, Billings, MT 59101 · Yellowstone CountyPhone(406) 237-7000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark David Schaefer is affiliated with 3 sites of care and 3 medical groups
Dr. Schaefer's primary practice is St Vincent Healthcare in Billings, Montana. Dr. Schaefer is also affiliated with St. Vincent Regional Hospital. The medical group on file is SCL Health Medical Group. Dmand AI also links Dr. Schaefer to 1 more hospital and 2 medical groups, each named with a free account.
St Vincent HealthcarePrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark David Schaefer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Schaefer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St Vincent Healthcare | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark David Schaefer is one of 245 emergency medicine physicians in Montana
Emergency medicine is Dr. Schaefer's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Schaefer is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Schaefer's licenses on file in 2 states: Montana and California.
Specialties and state licenses
- Emergency medicine, MontanaPrimary
- California license
Emergency medicine physicians near Dr. Schaefer
Counts of emergency 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. Mark David Schaefer billed Medicare for 511 services in 2024
CMS data shows 511 Medicare services from Dr. Schaefer across 4 procedure codes in 2024, for 471 Medicare patients. Medicare paid $55,497 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024511
Medicare patients471
Paid by Medicare$55,497
Procedure codes4
Dr. Schaefer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5162024: 5111%
Dr. Schaefer compared with the Montana median for emergency medicine physicians, 2024
- Dr. Schaefer
- Montana median
- Medicare services
- 511vs 30468% above
- Medicare patients
- 471vs 30256% above
- Part D claims
- 126vs 452.8 times
Medians across 269 emergency medicine physicians in Montana 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.
Need commercial claims for Dr. Schaefer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Schaefer and other emergency medicine physicians in Montana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark David Schaefer treated 471 Medicare patients in 2024, average age 74
CMS counts 471 Medicare patients who saw Dr. Schaefer in 2024. The largest group is 65 to 74, with 167 patients. 75% of them have high blood pressure, and 68% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.73, 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 72, with 57% women.
Medicare patients, 2024471
Average age74
Average risk score1.73
Also on Medicaid19%
Dr. Schaefer's Medicare patients by age, 2024
Dr. Schaefer's Medicare patients by sex, 2024
- Women26857%
- Men20343%
Chronic conditions among Dr. Schaefer's Medicare patients, 2024
- High blood pressure75%
- High cholesterol68%
- Arthritis51%
- Mood disorders42%
- Depression39%
- Ischemic heart disease38%
- Anxiety36%
- Diabetes36%
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 72
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark David Schaefer wrote 221 Medicare Part D claims in 2024
In 2024, Dr. Schaefer wrote 221 Medicare Part D claims for 146 patients. 95% of them were for generic drugs. CMS names the drug for 126 of them, across 6 drugs with 11 or more claims each, at $410 in total drug cost. In 2023, CMS named 126 claims across 6 drugs.
Part D claims, 2024221
Drugs named by CMS6
Total drug cost$410
Part D patients146
Dr. Schaefer's Part D claims by kind of drug, 2024
- Generic210 claims95%
- Brand-name11 claims5%
Dr. Schaefer'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. Schaefer's Part D claims, 2024
- Opioids21%47 of 221 claims
- Antibiotics22%48 of 221 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: 1262024: 126No change
Drugs named by CMS: 6 in 2024, 6 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. Mark David 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 David Schaefer has 1 publication on record
Dmand AI links 1 paper to Dr. Schaefer in 2018. Dr. Schaefer's most frequent co-authors are Molly Estes, MD, Mindi Janell Guptill, MD and Michael Kiemeney, MD.
Papers1
Dr. Schaefer's most frequent co-authors
- Molly Estes, MD1 shared paper
- Mindi Janell Guptill, MD1 shared paper
- Michael Kiemeney, MD1 shared paper
Recent publications by Dr. Schaefer
See who Dr. Schaefer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Schaefer works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark David Schaefer graduated from University Of Washington School Of Medicine
Dr. Schaefer graduated from University Of Washington School Of Medicine in 2016. Dr. Schaefer is a member of AOA, ACEP and EMRA.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Mark David Schaefer accepts plans from 5 insurance carriers
Dr. Schaefer is in network with 5 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Medical Mutual of Ohio
Plan types Dr. Schaefer accepts, by number of carriers
- HMO4
- POS3
- PPO3
- Medicare2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Mark David 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 | 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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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 David 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 David Schaefer's NPI number?
Dr. Mark David Schaefer's NPI number is 1043664022. It was assigned on April 15, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark David Schaefer?
Dr. Mark David Schaefer is an emergency medicine physician in Billings, Montana. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Mark David Schaefer practice?
Dr. Schaefer practices at 1233 N 30th St, Billings, MT 59101. Dr. Schaefer's primary practice is St Vincent Healthcare in Billings, Montana. Dmand AI also links Dr. Schaefer to 1 hospital and 2 medical groups.
What is Dr. Mark David Schaefer's office phone number?
The practice phone on file for Dr. Schaefer is (406) 237-7000.
What is Dr. Mark David Schaefer's medical license number?
Dr. Schaefer holds Montana license 77136, one of the licenses on file in 2 states.
Which states has Dr. Mark David Schaefer been licensed in?
Dmand AI has state licenses on file for Dr. Schaefer in Montana (2019 to 2027) and California (2017 to 2021).
Which hospitals is Dr. Mark David Schaefer affiliated with?
Dr. Schaefer is affiliated with St. Vincent Regional Hospital. Dmand AI links Dr. Schaefer to 1 more hospital.
What medical group is Dr. Mark David Schaefer part of?
Dr. Schaefer is linked to SCL Health Medical Group. Dmand AI links Dr. Schaefer to 2 more medical groups.
Does Dr. Mark David Schaefer accept Medicare?
Yes. CMS data shows Dr. Schaefer billed Medicare for 511 services in 2024, and Dr. Schaefer accepts Medicare assignment.
How many Medicare patients does Dr. Mark David Schaefer see?
CMS counts 471 Medicare patients who saw Dr. Schaefer in 2024, with an average age of 74.
Show 8 more questionsShow fewer questions
Is Dr. Mark David Schaefer board certified?
Yes. Dr. Schaefer is board certified in emergency medicine by the American Board of Emergency Medicine.
What services does Dr. Mark David Schaefer bill to Medicare?
In 2024, Dr. Schaefer's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and emergency department visit (99283).
Where did Dr. Mark David Schaefer go to medical school?
Dr. Schaefer graduated from University Of Washington School Of Medicine in 2016.
What drugs does Dr. Mark David Schaefer prescribe most?
In 2024 Medicare Part D data, Dr. Schaefer's most prescribed drugs by claims were Ondansetron ODT, Oxycodone HCl and Cephalexin.
How long has Dr. Mark David Schaefer been practicing?
Dr. Schaefer graduated from medical school in 2016, 10 years ago.
Does Dr. Mark David Schaefer do research?
Dmand AI links 1 publication to Dr. Schaefer.
Who does Dr. Mark David Schaefer publish with?
Dr. Schaefer's most frequent co-authors are Molly Estes, MD (1 shared paper), Mindi Janell Guptill, MD (1 shared paper) and Michael Kiemeney, MD (1 shared paper).
What insurance does Dr. Mark David Schaefer accept?
Dr. Schaefer is in network with 5 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 4. Check the plan with the practice before a visit.
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