Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Marc J Davis, DO

Individual provider Family Medicine Physician · NPI 1194763060

Marc J Davis, DO is registered under Family Practice in Ada, Oklahoma. Graduated from Oklahoma State University College of Osteopathic Medicine in 1991, 35 years ago. Practices with Mercy Clinic Oklahoma Communities, a 648-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
35
Trained at
Oklahoma State University College of Osteopathic Medicine
Licensed in
OK
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

530 N Monte Vista St Ste A
Ada, OK 74820-4675
Phone: (580) 310-9510
Fax: (580) 436-4447
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 3540 (OK)

Record details

NPI number1194763060
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 3, 2006
Last updated in NPPESSeptember 15, 2020
Certification dateSeptember 15, 2020

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Also practisesOSTEOPATHIC MANIPULATIVE MEDICINE
Medical schoolOKLAHOMA STATE UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 1991 (35 years in practice)
Group practice Mercy Clinic Oklahoma Communities — 648 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients168
Services billed 416 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $32 2 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Mercy Hospital Ada Hospital · Ada, OK · listed as Mercy Hospital Ada, Inc
  • Choice Health At Home - Southeastern Oklahoma Hospice Hospice · Ada, OK

Colleagues at Mercy Clinic Oklahoma Communities

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 648 clinicians in the practice; 12 are shown here.

Other providers in Ada