Mark G. Oas, DC
- Medicare patients, 2024
- 62
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2005
- Practice address
- 1000 N Oak Ave, Marshfield, WI 54449
- Practice phone
- Call (715) 847-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Marshfield Clinic East Wing Outpatient Building
Marshfield, Wisconsin
Find Mark Oas' 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.
Mark G. Oas is a chiropractor in Marshfield, Wisconsin
Mark Oas practices at Marshfield Clinic East Wing Outpatient Building in Marshfield, Wisconsin.
Mark Oas' NPI, 1487648093, was assigned on September 9, 2005. Mark Oas graduated from Northwestern College of Chiropractic in 2001. Mark Oas holds Wisconsin license 3823-012.
- NPI
- 1487648093NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3870537921
- NPI enumeration date
- September 9, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (715) 847-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Mark G. Oas practices at Marshfield Clinic East Wing Outpatient Building in Marshfield, Wisconsin
Mark Oas' primary practice is Marshfield Clinic East Wing Outpatient Building, at 1000 N Oak Ave, Marshfield, WI 54449 in Wood County. The practice phone is (715) 847-3000.
- Marshfield Clinic East Wing Outpatient Building1000 N Oak Ave, Marshfield, WI 54449 · Wood CountyPhone(715) 847-3000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Mark G. Oas is affiliated with 2 sites of care
Mark Oas' primary practice is Marshfield Clinic East Wing Outpatient Building in Marshfield, Wisconsin. Dmand AI also links Mark Oas to 1 physician office, 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 Mark G. Oas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mark Oas practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Marshfield Clinic East Wing Outpatient Building | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Mark G. Oas is one of 1,792 chiropractors in Wisconsin
Chiropractor is Mark Oas' primary specialty in the NPI Registry, under taxonomy code 111N00000X. Mark Oas is licensed in Wisconsin.
Specialties and state licenses
- Chiropractor, WisconsinPrimary
Chiropractors near Mark Oas
Counts of chiropractors 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
Mark G. Oas treated 62 Medicare patients in 2024, average age 65
CMS counts 62 Medicare patients who saw Mark Oas in 2024. The largest group is 65 to 74, with 31 patients. 55% of them have high blood pressure, and 55% have high cholesterol. 34% are also on Medicaid. Their average risk score is 0.83, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Mark Oas' median patient age at 45, with 59% women.
Mark Oas' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Mark Oas' Medicare patients by sex, 2024
- Women3150%
- Men3150%
Chronic conditions among Mark Oas' Medicare patients, 2024
- High blood pressure55%
- High cholesterol55%
- Arthritis45%
- Mood disorders34%
- Depression31%
- Anxiety29%
- Asthma18%
- Diabetes18%
Share of Medicare patients with each condition. A patient can have several.
Mark Oas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 45
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Mark G. Oas takes part in Medicare
Mark Oas 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)
Mark G. Oas graduated from Northwestern College of Chiropractic
Mark Oas graduated from Northwestern College of Chiropractic in 2001.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Mark G. Oas'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 patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - 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) |
| 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 Mark G. Oas
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mark G. Oas' NPI number?
Mark G. Oas' NPI number is 1487648093. It was assigned on September 9, 2005, and it is active in the NPI Registry.
What does Mark G. Oas specialize in?
Mark G. Oas is a chiropractor in Marshfield, Wisconsin. The primary specialty in the NPI Registry is Chiropractor (taxonomy code 111N00000X).
Where does Mark G. Oas practice?
Mark Oas practices at 1000 N Oak Ave, Marshfield, WI 54449. Mark Oas' primary practice is Marshfield Clinic East Wing Outpatient Building in Marshfield, Wisconsin. Dmand AI also links Mark Oas to 1 physician office.
What is Mark G. Oas' office phone number?
The practice phone on file for Mark Oas is (715) 847-3000.
What is Mark G. Oas' medical license number?
Mark Oas holds Wisconsin license 3823-012.
Does Mark G. Oas accept Medicare?
Yes. CMS lists Mark Oas as accepting Medicare assignment.
How many Medicare patients does Mark G. Oas see?
CMS counts 62 Medicare patients who saw Mark Oas in 2024, with an average age of 65.
Where did Mark G. Oas go to medical school?
Mark Oas graduated from Northwestern College of Chiropractic in 2001.
How long has Mark G. Oas been practicing?
Mark Oas graduated from medical school in 2001, 25 years ago.
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