Nephrologists in Oklahoma
Data updated monthly · Last refresh October 2026
110 Nephrology providers practice in Oklahoma, including 44 (40%) offering telehealth. The largest concentration is in Oklahoma City. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
110providers
44telehealth
Oklahoma Citytop city
Nephrology by city in Oklahoma
Choose a city to see providers there.
Where Nephrologists in Oklahoma practice
From CMS Medicare enrollment records covering 84 of the 110 providers listed here (76%). Providers who do not bill Medicare are not included in these figures.
25%solo or small practice (under 10 clinicians)
32%mid-size group (10 to 99)
43%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Nephrologists | All clinicians in group | Main city |
| Integris Ambulatory Care Corp.oration | 13 | 687 | Oklahoma City |
| Kidney Specialists of Central Oklahoma, PC | 13 | 18 | Oklahoma City |
| Nephrology Associates, Inc.. | 11 | 21 | Tulsa |
| Tni-Kso PC | 10 | 20 | Tulsa |
| Warren Clinic Inc. | 6 | 787 | Tulsa |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Nephrologists affiliated |
| Integris Baptist Medical Center, Inc. | Oklahoma City | Nonprofit | 3 of 5 | 26 |
| Integris Southwest Medical Center | Oklahoma City | Nonprofit | 2 of 5 | 21 |
| Saint Francis Hospital, Inc. | Tulsa | Nonprofit | 5 of 5 | 20 |
| Ascension St John Medical Center | Tulsa | Nonprofit | 3 of 5 | 18 |
| Saint Francis Hospital Muskogee | Muskogee | Nonprofit | 3 of 5 | 16 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Nephrology providers in Oklahoma
Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.
Dr. Andres Caero Romero, MDArdmore, OK · $630 in drug and device payments (2025) ·
(580) 223-8614 Dr. Reeta Thukral, M.D.Edmond, OK · No drug or device payments recorded (2025) ·
(785) 608-7129 Dr. Viorica Khalili, MDEdmond, OK · No drug or device payments recorded (2025) ·
(405) 340-4565 Dr. Rashmi Vijayvargiya, M.D Dr. Chinedu Nwachukwu, MDLawton, OK · $382 in drug and device payments (2025) · Telehealth ·
(580) 699-5400 Dr. Magdalena Sikora, M.D.Lawton, OK · $517 in drug and device payments (2025) · Telehealth ·
(580) 699-5400 Dr. Suhas Agte, M DLawton, OK · No drug or device payments recorded (2025) ·
(580) 357-8330 Dr. Syed Afzal, MDLawton, OK · $231 in drug and device payments (2025) · Telehealth ·
(580) 699-5400 Dr. Paul Dreyer, MDMcalester, OK · $1,199 in drug and device payments (2025) ·
(918) 420-1238 Dr. Bereket Alemu, M.DMidwest City, OK · $401 in drug and device payments (2025) ·
(405) 737-4900 Dr. Gary Dubois, MDMidwest City, OK · No drug or device payments recorded (2025) ·
(405) 741-8686 Dr. Rajesh Narula, M.D.Midwest City, OK · No drug or device payments recorded (2025) ·
(405) 737-0881 Dr. Rizwan Aslam, MDMidwest City, OK · $392 in drug and device payments (2025) ·
(405) 737-4900 Dr. Samson Ambaw, MDMidwest City, OK · $501 in drug and device payments (2025) ·
(405) 737-4900 Dr. Wudeneh Zewdie, M.D.Midwest City, OK · $924 in drug and device payments (2025) ·
(405) 737-4900 Dr. Srinivas Mahesh Katta, MDMuskogee, OK · $183 in drug and device payments (2025) ·
(918) 913-9408 Dr. Cuong Nguyen, MDNorman, OK · $689 in drug and device payments (2025) · Telehealth ·
(405) 217-8500 Dr. Oswald Llanderosos, M.D.Norman, OK · No drug or device payments recorded (2025) ·
(405) 217-8500 Dr. Ahmad Bilal, MDOklahoma City, OK · $171 in drug and device payments (2025) · Telehealth ·
(405) 951-4944 Dr. Aly Aly, MDOklahoma City, OK · $112 in drug and device payments (2025) ·
(405) 951-4944 Dr. Anupa Khastgir, MDOklahoma City, OK · $145 in drug and device payments (2025) ·
(405) 942-0794 Dr. Ashley Kinder, DOOklahoma City, OK · $531 in drug and device payments (2025) ·
(405) 748-3129 Dr. Benjamin Cowley, MDOklahoma City, OK · No drug or device payments recorded (2025) ·
(405) 271-8478 Dr. Bradley Carter, MDOklahoma City, OK · $1,187 in drug and device payments (2025) · Telehealth ·
(405) 942-5442 Dr. Bradley Long, M.D.Oklahoma City, OK · $583 in drug and device payments (2025) · Telehealth ·
(405) 942-5442 Dr. Celeste BoeckmanOklahoma City, OK · $43,208 in drug and device payments (2025) · Telehealth ·
(405) 748-5806 Dr. Chris Sholer, MDOklahoma City, OK · $1,276 in drug and device payments (2025) ·
(405) 842-8298 Dr. Cynthia Redding, M.D.Oklahoma City, OK · No drug or device payments recorded (2025) ·
(405) 945-4905 Dr. David Thompson, DOOklahoma City, OK · $22 in drug and device payments (2025) ·
(405) 942-5442 Dr. Fazal Ali, MDOklahoma City, OK · $654 in drug and device payments (2025) ·
(405) 644-5428 Dr. Gary Bond, MDOklahoma City, OK · $1,741 in drug and device payments (2025) · Telehealth ·
(405) 942-5442 Dr. Gigi Toma, M.D.Oklahoma City, OK · $607 in drug and device payments (2025) · Telehealth ·
(405) 272-8367 Dr. Guruprasad Manjunath, M.D.Oklahoma City, OK · $126 in drug and device payments (2025) · Telehealth ·
(405) 942-5442 Dr. Jawaid Jamal, MDOklahoma City, OK · $1,091 in drug and device payments (2025) · Telehealth ·
(405) 942-5442 Dr. Joe Ghata, MDOklahoma City, OK · $20,571 in drug and device payments (2025) · Telehealth ·
(405) 272-8367 Dr. Jose-marie El-amm, MDOklahoma City, OK · $252 in drug and device payments (2025) ·
(405) 949-3816 Dr. Kaelin Merveldt, M.D.Oklahoma City, OK · $1,205 in drug and device payments (2025) · Telehealth ·
(405) 748-5800 Dr. Kai Lau, MDOklahoma City, OK · No drug or device payments recorded (2025) ·
(405) 271-8478 Dr. Lamia Abughazaleh, MDOklahoma City, OK · $20 in drug and device payments (2025) ·
(567) 698-0665 Dr. Laura Rankin, MDOklahoma City, OK · $2,000 in drug and device payments (2025) ·
(405) 942-5442 Dr. Laxminarayana Gadde, M.D.Oklahoma City, OK · $766 in drug and device payments (2025) · Telehealth ·
(405) 942-5442 Dr. Leroy Southmayd, M.D.Oklahoma City, OK · No drug or device payments recorded (2025) ·
(405) 823-3073 Dr. Lorraine Wilson, MDOklahoma City, OK · $113 in drug and device payments (2025) ·
(405) 748-5800 Dr. Lukas Haragsim, MDOklahoma City, OK · No drug or device payments recorded (2025) ·
(405) 271-8478 Dr. Mamoon Rasheed, M.D.Oklahoma City, OK · $1,181 in drug and device payments (2025) · Telehealth ·
(405) 942-5442 Dr. Mansoor Khalid, M.D.Oklahoma City, OK · $436 in drug and device payments (2025) · Telehealth ·
(405) 942-5442 Conditions Nephrology providers in Oklahoma commonly treat
Patients often search by condition rather than specialty. These are conditions typically managed by Nephrology providers. Individual practices vary, so confirm with the provider before booking.
- Chronic kidney disease
- Kidney stones
- Dialysis care
- High blood pressure
Common questions
How many Nephrology providers are in Oklahoma?There are 110 Nephrology providers with active NPI records practicing in Oklahoma, according to federal NPPES data refreshed monthly.
Do Nephrology providers in Oklahoma offer telehealth?Yes. 44 of the 110 Nephrology providers in Oklahoma (about 40%) report offering telehealth services in CMS data.
Which cities in Oklahoma have the most Nephrology providers?Oklahoma City (45), Tulsa (40), Midwest City (6) have the highest concentration of Nephrology providers in Oklahoma.
How many Nephrology providers in Oklahoma received drug or device company payments?83 of 110 Nephrology providers in Oklahoma (75%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
What conditions do Nephrology providers in Oklahoma treat?Nephrology providers commonly treat chronic kidney disease, kidney stones, dialysis care, high blood pressure and related conditions. Individual practices vary, so confirm with the provider before booking.
Where does this data come from?Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
Do most Nephrologists in Oklahoma work in independent practices or large health systems?Among 84 Nephrologists in Oklahoma enrolled in Medicare, 25% bill through a solo or small practice with fewer than 10 clinicians, 32% through a mid-size group of 10 to 99, and 43% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Nephrologists in Oklahoma work at?According to CMS facility affiliation records, the Oklahoma hospitals where the most Nephrologists hold privileges are Integris Baptist Medical Center, Inc. in Oklahoma City; Integris Southwest Medical Center in Oklahoma City; Saint Francis Hospital, Inc. in Tulsa.
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