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

Dr. Michael Joseph Warren, DO

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1568963551

Dr. Michael Joseph Warren, DO practises Gastroenterology in Tulsa, Oklahoma. Graduated from Pacific NW Un of Hs, Col of Osteopathic Medicine in 2018, 8 years ago. Practices with Warren Clinic Inc, a 772-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Oklahoma and Utah.

Years since qualifying
8
Trained at
Pacific NW Un of Hs, Col of Osteopathic Medicine
Licensed in
OK, UT
In the registry since
2018
Specialties on file
3
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

Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.

Tulsa, OK

No coordinates on file. Search this address in Google Maps

Additional practice locations (2)

  • 717 S Houston Ave, Tulsa, OK 74127-9023 — (918) 382-5058
  • 395 W Cougar Blvd Ste 802, Provo, UT 84604-3311 — (801) 357-1030

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 6796 (OK)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X (OK)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 14293401-1204 (UT)

Record details

NPI number1568963551
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedFebruary 24, 2018
Last updated in NPPESJuly 27, 2026
Certification dateJuly 27, 2026

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolPACIFIC NW UN OF HS, COL OF OSTEOPATHIC MEDICINE
Graduated 2018 (8 years in practice)
Group practice Warren Clinic Inc — 772 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Upper gastrointestinal (GI) endoscopy for acid reflux 277 times · 94th percentile
Colonoscopy 123 times · 84th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients205
Services billed 333 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 $2,270 103 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.

Colleagues at Warren Clinic Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 772 clinicians in the practice; 12 are shown here.

Other providers in Tulsa