Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Theresa Lynn Gress, APRN

Individual provider Acute Care Nurse Practitioner · NPI 1598250508

Theresa Lynn Gress, APRN is a Nurse Practitioner in Tulsa, Oklahoma. Qualified in 2018, 8 years ago. Practices with Warren Clinic Inc, a 772-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
8
Licensed in
OK
In the registry since
2018
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.

See every abbreviation used in this directory →

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Practice location Address checks out

6475 S Yale Ave Ste 308
Tulsa, OK 74136-7802
Phone: (918) 499-4000
Fax: (918) 499-4001
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Acute Care Nurse Practitioner (primary) Taxonomy 363LA2100X · Licence R0100775 (OK)

Record details

NPI number1598250508
Entity typeIndividual (Type 1)
GenderFemale
Credentials APRN
Sole proprietorNo
NPI enumeratedJune 22, 2018
Last updated in NPPESJune 24, 2026
Certification dateJune 24, 2026

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice Warren Clinic Inc — 772 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 patients103
Services billed 166 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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 $63 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.

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