Pediatric Hematologists and Oncologists in Oklahoma
Data updated monthly · Last refresh October 2026
29 Pediatric Hematology & Oncology providers practice in Oklahoma. 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.
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Pediatric Hematology & Oncology by city in Oklahoma
Choose a city to see providers there.
Where Pediatric Hematologists and Oncologists in Oklahoma practice
From CMS Medicare enrollment records covering 8 of the 29 providers listed here (28%). Providers who do not bill Medicare are not included in these figures.
Largest practice groups
| Group (as registered with Medicare) | Pediatric Hematologists and Oncologists | All clinicians in group | Main city |
| Ou Health Partners Inc. | 8 | 1,167 | Oklahoma City |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Pediatric Hematologists and Oncologists affiliated |
| O U Medical Center | Oklahoma City | Nonprofit | 2 of 5 | 2 |
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.
Pediatric Hematology & Oncology 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. Ajla Wasti, MDOklahoma City, OK · No drug or device payments recorded (2025) ·
(405) 271-4417 Dr. Ashley Baker, MDOklahoma City, OK · $145 in drug and device payments (2025) ·
(405) 271-4412 Dr. Charles Sexauer, MDOklahoma City, OK · No drug or device payments recorded (2025) ·
(405) 271-4412 Dr. Hanumantha Pokala, MDOklahoma City, OK · $140 in drug and device payments (2025) ·
(405) 271-5311 Dr. Jessica Kurian, MDOklahoma City, OK · $173 in drug and device payments (2025) ·
(405) 271-5311 Dr. Joan Cain, MDOklahoma City, OK · No drug or device payments recorded (2025) ·
(405) 271-4412 Dr. John Frazer, M.D., PH.D.Oklahoma City, OK · No drug or device payments recorded (2025) ·
(405) 271-5311 Dr. Kisha Beg, M.B.,B.S.Oklahoma City, OK · No drug or device payments recorded (2025) ·
(405) 271-5312 Dr. Laura Rooms, MDOklahoma City, OK · $78 in drug and device payments (2025) ·
(405) 271-4412 Dr. Osman Khan, M.D.Oklahoma City, OK · $32,872 in drug and device payments (2025) ·
(405) 496-6002 Dr. Rachel Gallant, M.D.Oklahoma City, OK · $64 in drug and device payments (2025) ·
(405) 271-4417 Dr. Rachel Posey, ARNPOklahoma City, OK · $298 in drug and device payments (2025) ·
(405) 271-4412 Dr. Ramya Ramakrishnan, MDOklahoma City, OK · $35 in drug and device payments (2025) ·
(713) 499-0895 Dr. Rene Mcnall-knapp, MDOklahoma City, OK · $39 in drug and device payments (2025) ·
(405) 271-4412 Dr. Rikin Shah, M.D.Oklahoma City, OK · $26,963 in drug and device payments (2025) ·
(806) 367-4988 Dr. Ryan Kiser, MDOklahoma City, OK · $91 in drug and device payments (2025) ·
(405) 271-5312 Dr. Samira Rifai, M.DOklahoma City, OK · No drug or device payments recorded (2025) ·
(405) 936-9966 Dr. Sayani TewariOklahoma City, OK · $26 in drug and device payments (2025) ·
(405) 271-5311 Dr. Suraj Pratap, MDOklahoma City, OK · $133 in drug and device payments (2025) ·
(405) 271-4000 Dr. William Meyer, MDOklahoma City, OK · No drug or device payments recorded (2025) ·
(405) 271-4412 Dr. Gregory Kirkpatrick, M.D.Tulsa, OK · No drug or device payments recorded (2025) ·
(918) 502-6720 Dr. Kamryn Smith, RNTulsa, OK · No drug or device payments recorded (2025) ·
(918) 502-6720 Dr. Mrinal Joshirao, MBBS, DNBTulsa, OK · No drug or device payments recorded (2025) ·
(918) 502-6720 Common questions
How many Pediatric Hematology & Oncology providers are in Oklahoma?There are 29 Pediatric Hematology & Oncology providers with active NPI records practicing in Oklahoma, according to federal NPPES data refreshed monthly.
Which cities in Oklahoma have the most Pediatric Hematology & Oncology providers?Oklahoma City (20), Tulsa (9) have the highest concentration of Pediatric Hematology & Oncology providers in Oklahoma.
How many Pediatric Hematology & Oncology providers in Oklahoma received drug or device company payments?19 of 29 Pediatric Hematology & Oncology providers in Oklahoma (66%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
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.
Which hospitals do Pediatric Hematologists and Oncologists in Oklahoma work at?According to CMS facility affiliation records, the Oklahoma hospitals where the most Pediatric Hematologists and Oncologists hold privileges are O U Medical Center in Oklahoma City.
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