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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WARREN CLINIC INC
NPI 1174582282
General Practice in Tulsa, OK

Active since March 20, 2006
6600 S YALE AVE, SUITE 1400, TULSA, OK 74136(918) 488-6001(918) 488-6010 Get Directions Write a Review

NPPES record last updated: September 18, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 18, 2026, Jul 21, 2022, Dec 18, 2018 and 1 more (4 updates tracked since 2017).

About Warren Clinic Inc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WARREN CLINIC INC (NPI 1174582282) is a healthcare organization registered as a general practice in Tulsa, Oklahoma and active in the NPI registry since March 2006. The organization lists Cathey Rae Duplissey, Credentialing Coordinator, as its authorized official.

NPPES Registry Identity

NPI1174582282
Entity TypeOrganization
Primary Taxonomy208D00000X
Legal Business NameWARREN CLINIC INC
Location Address6600 S YALE AVE, SUITE 1400Tulsa, OK 74136-3310
Mailing Address6600 S Yale Ave Ste 1400Tulsa, OK 74136-3331 · (918) 488-6001 · Fax (918) 502-8002
Phone(918) 488-6001
Fax(918) 488-6010
Organization SubpartNo
Authorized OfficialCathey Rae DuplisseyCredentialing Coordinator · (918) 488-6687
Enumeration DateMarch 20, 2006
Last NPPES UpdateSeptember 18, 20264 updates tracked since enumeration
NPPES CertifiedSeptember 18, 2026
✔ NPI 1174582282 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians
Taxonomy Code208D00000X
Definition
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee
6600 S YALE AVE, Tulsa, OK 74136
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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Oklahoma, CommunityCare, Mending Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Warren Clinic Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

1,142

Medicare enrollment records show 1,142 clinicians reassign Medicare billing to Warren Clinic Inc, which bills Medicare for the services they deliver. Of these, 30 practice at this address and 738 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 57

Nurse Practitioner244
Hospitalist162
Family Practice119
Internal Medicine71
Neurology44
Critical Care (Intensivists)40
Obstetrics/Gynecology35
Pediatric Medicine32
49 other specialties395

Nearest to this location (20)

See all 1,142
Brent Dennis, M.D.
Internal Medicine
NPI 1932185709
6600 S YALE AVE STE 600
Tulsa, OK 74136
(918) 491-5990
✔ PECOS✔ Accepts MedicareSame address
Donald Higgins, M.D.
Internal Medicine
NPI 1467439554
6600 S YALE AVE STE 800
Tulsa, OK 74136
(918) 491-3900
✔ PECOS✔ Accepts MedicareSame address
Michael Maddox, D.O.
Family Practice
NPI 1083692115
6600 S YALE AVE STE 850
Tulsa, OK 74136
(918) 481-7700
✔ PECOS✔ Accepts MedicareSame address
Gerard Mcnulty, M.D.
Internal Medicine
NPI 1073592945
6600 S YALE AVE STE 900
Tulsa, OK 74136
(918) 481-4944
✔ PECOS✔ Accepts MedicareSame address
John Ruffing, M.D.
Internal Medicine
NPI 1386618817
6600 S YALE AVE STE 850
Tulsa, OK 74136
(918) 481-7700
✔ PECOS✔ Accepts MedicareSame address
Moutasim Al Shaer, M. D.
Hospitalist
NPI 1154361004
6600 S YALE AVE SUITE 1400
Tulsa, OK 74136
(918) 488-6001
✔ PECOS✔ Accepts MedicareSame address
Scott Asakevich, M.D.
Internal Medicine
NPI 1356309769
6600 S YALE AVE STE 600
Tulsa, OK 74136
(918) 491-5990
✔ PECOS✔ Accepts MedicareSame address
Timothy Choy, DO
Family Practice
NPI 1033739560
6600 S YALE AVE STE 700
Tulsa, OK 74136
(918) 502-7300
✔ PECOS✔ Accepts MedicareSame address
Allison Conaway, APRN, CNP
Nurse Practitioner
NPI 1639776255
6600 S YALE AVE STE 650
Tulsa, OK 74136
(918) 884-2884
✔ PECOS✔ Accepts MedicareSame address
Micah Derby, D.O.
Internal Medicine
NPI 1548605199
6600 S YALE AVE STE 650
Tulsa, OK 74136
(918) 502-7800
✔ PECOS✔ Accepts MedicareSame address
Randall Herbel, MD
Family Practice
NPI 1619976461
6600 S YALE AVE STE 700
Tulsa, OK 74136
(918) 502-7300
✔ PECOS✔ Accepts MedicareSame address
Lance King, MD
Family Practice
NPI 1538168380
6600 S YALE AVE SUITE 950
Tulsa, OK 74136
(918) 488-6670
✔ PECOS✔ Accepts MedicareSame address
Scott Koch, DO
Family Practice
NPI 1144229469
6600 S YALE AVE STE 700
Tulsa, OK 74136
(918) 502-7300
✔ PECOS✔ Accepts MedicareSame address
Martha Malone
Nurse Practitioner
NPI 1174184675
6600 S YALE AVE STE 700
Tulsa, OK 74136
(918) 502-7300
✔ PECOS✔ Accepts MedicareSame address
Samantha Nivens, APRN
Nurse Practitioner
NPI 1376338574
6600 S YALE AVE STE 600
Tulsa, OK 74136
(918) 491-5990
✔ PECOS✔ Accepts MedicareSame address
Lynn Preston, DO
Cardiovascular Disease (Cardiology)
NPI 1790708543
6600 S YALE AVE SUITE 1400
Tulsa, OK 74136
(918) 488-6001
✔ PECOS✔ Accepts MedicareSame address
Erin Rowan, APRN
Nurse Practitioner
NPI 1396118972
6600 S YALE AVE STE 600
Tulsa, OK 74136
(918) 884-2884
✔ PECOSSame address
Cristina Sarrosa, APRN-CNP
Nurse Practitioner
NPI 1376097261
6600 S YALE AVE STE 600
Tulsa, OK 74136
(918) 491-5990
✔ PECOS✔ Accepts MedicareSame address
Scott Sexter, MD
Family Practice
NPI 1912906132
6600 S YALE AVE STE 700
Tulsa, OK 74136
(918) 502-7300
✔ PECOSSame address
Thalia Furman, MS, RDN, LD
Registered Dietitian or Nutrition Professional
NPI 1427989938
6600 S YALE AVE STE 750
Tulsa, OK 74136
(832) 452-6702
✔ Accepts MedicareSame address
See all 1,142 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Warren Clinic Inc's NPI number?

The NPI number for Warren Clinic Inc is 1174582282. It was assigned to this organization in the NPPES registry on March 20, 2006.

Where is Warren Clinic Inc located?

Warren Clinic Inc is located at 6600 S Yale Ave Suite 1400, Tulsa, OK 74136. The listed phone number is (918) 488-6001.

What is Warren Clinic Inc's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Is Warren Clinic Inc enrolled in Medicare?

Yes. Warren Clinic Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Warren Clinic Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1,142 clinicians in 57 Medicare specialties reassign their Medicare billing to Warren Clinic Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Nurse Practitioner (244), Hospitalist (162) and Family Practice (119). Of these, 30 practice at this address and 738 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Warren Clinic Inc accept?

Health plans from Blue Cross and Blue Shield of Oklahoma, CommunityCare and Mending Health list Warren Clinic Inc as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Warren Clinic Inc was last updated on September 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 45 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.