Pediatric Hematology-Oncology in Oklahoma
39 licensed pediatric oncologists practicing in Oklahoma across 9 cities.
This page republishes public records from the federal NPI Registry, which every licensed U.S. healthcare provider is required to maintain. These are federal-agency records, not a directory we compile.
Source: NPI Registry · last checked
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NPI Registry records — Pediatric Hematology-Oncology in Oklahoma
29 of 39 shown have disclosed payments in CMS Open Payments (2024)
Showing 39 of 39 federal NPI records, alphabetical by last name. Contact details come directly from the NPI Registry — verify currency with the provider's office. Pharma / device payment disclosures from CMS Open Payments are shown where the physician appears in that federal database.
Ashley Baker, MD
1200 N Phillips Ave, Suite 10000
Oklahoma City, OK 73104 · (405) 271-4412
License: 27667 (OK)
In 2024, $580 was disclosed to this physician across 8 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($580).
Largest single payer: Sobi, Inc ($415).
Kisha Aziz Beg, MB, BS
1200 Childrens Ave
Oklahoma City, OK 73104 · (405) 271-5312
License: 33975 (OK)
In 2023, $15 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($15).
Joan P Cain, MD
1200 N Phillips Ave, Suite 10000
Oklahoma City, OK 73104 · (405) 271-4412
License: 16135 (OK)
John Kimble Frazer, MD, PHD
1200 Childrens Ave, Suite 14500
Oklahoma City, OK 73104 · (405) 271-5311
License: 29167 (OK)
In 2024, $20 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($20).
Largest single payer: Illumina, Inc. ($20).
Rachel Gallant, MD
1200 Childrens Ave, Oucp 14000 A2
Oklahoma City, OK 73104 · (405) 271-4417
License: 31489 (OK)
In 2023, $116 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($116).
In 2023, $26 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($26).
In 2024, $31 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($31).
Largest single payer: Amgen Inc. ($16).
In 2024, $61 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($61).
Largest single payer: Pfizer Inc. ($34).
Osman Khan, MD
1200 Childrens Ave Ste 14500, Pediatric Hematology Oncology
Oklahoma City, OK 73104 · (405) 496-6002
License: 28138 (OK)
In 2024, $23,849 was disclosed to this physician across 19 transactions by pharmaceutical or medical-device companies.
Mostly charitable contributions ($16,928) and consulting fees ($3,750).
Largest single payer: Genzyme Corporation ($8,386).
In 2024, $20 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($20).
Largest single payer: Pfizer Inc. ($20).
Ryan Kiser, MD
1200 Childrens Ave # 14500
Oklahoma City, OK 73104 · (405) 271-5312
License: 35517 (OK)
In 2024, $84 was disclosed to this physician across 4 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($84).
Largest single payer: Daiichi Sankyo Inc. ($39).
Jessica Justus Kurian, MD
1200 Childrens Ave
Oklahoma City, OK 73104 · (405) 271-5311
License: 45067 (OK)
In 2024, $127 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($127).
Largest single payer: Agios Pharmaceuticals, Inc. ($127).
Ossama Mohammed Maher, MD
3100 Sw 62nd Ave, Suite 121
Miami, FL 33155 · (305) 662-8360
License: ME131868 (FL)
In 2024, $648 was disclosed to this physician across 22 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($600) and gifts ($48).
Largest single payer: Sobi, Inc ($216).
In 2024, $48 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly gifts ($48).
Largest single payer: Astellas Pharma US Inc ($48).
Rene Y McNall-knapp, MD
1200 N Phillips Ave, Suite 10000
Oklahoma City, OK 73104 · (405) 271-4412
License: 22501 (OK)
In 2024, $263 was disclosed to this physician across 5 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($263).
Largest single payer: Alexion Pharmaceuticals, Inc. ($242).
In 2024, $34 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($34).
Largest single payer: Pfizer Inc. ($34).
William H Meyer, MD
1200 N Phillips Ave, Suite 10000
Oklahoma City, OK 73104 · (405) 271-4412
License: 20433 (OK)
Ashraf Mahmoud Abdelmonem Mohamed, MD
6161 S Yale Ave
Tulsa, OK 74136 · (918) 502-6720
License: 21491 (OK)
In 2024, $257 was disclosed to this physician across 9 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($257).
Largest single payer: Astellas Pharma US Inc ($205).
Hanumantha Rao Pokala, MD
1200 N Phillips Ave, Suite 14500
Oklahoma City, OK 73104 · (405) 271-5311
License: 27682 (OK)
In 2023, $161 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($161).
Rachel R Posey, ARNP
1200 N Phillips Ave, Suite 10000
Oklahoma City, OK 73104 · (405) 271-4412
License: R0060302 (OK)
In 2024, $38 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($38).
Largest single payer: Incyte Corporation ($19).
Suraj Pratap, MD
1200 Childrens Ave Ste 14500
Oklahoma City, OK 73104 · (405) 271-4000
License: 18840 (NV)
In 2024, $519 was disclosed to this physician across 13 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($519).
Largest single payer: Pfizer Inc. ($141).
Ramya Ramakrishnan, MD
1200 Childrens Ave
Oklahoma City, OK 73104 · (713) 499-0895
License: 45983 (OK)
In 2024, $123 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($123).
Largest single payer: Sobi, Inc ($123).
Samira Zaza Rifai, MD
4200 W Memorial Rd, Ste: 303
Oklahoma City, OK 73120 · (405) 936-9966
License: 0101242846 (VA)
Ricky Inocencio Rodriguez, DO
333 N Santa Rosa St
San Antonio, TX 78207 · (210) 704-3910
License: V1246 (TX)
Laura M Rooms, MD
1200 N Phillips Ave, Suite 10000
Oklahoma City, OK 73104 · (405) 271-4412
License: 20770 (OK)
In 2024, $40 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($40).
Largest single payer: Jazz Pharmaceuticals Inc. ($21).
In 2024, $34 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($34).
Largest single payer: Pfizer Inc. ($34).
Charles L Sexauer, MD
1200 N Phillips Ave, Suite 10000
Oklahoma City, OK 73104 · (405) 271-4412
License: 10583 (OK)
Rikin Kartikbhai Shah, MD
1200 Childrens Ave, Oucp 14500
Oklahoma City, OK 73104 · (806) 367-4988
License: 30548 (OK)
In 2024, $10,928 was disclosed to this physician across 11 transactions by pharmaceutical or medical-device companies.
Mostly consulting fees ($9,240) and meals and beverages ($1,426).
Largest single payer: Sobi, Inc ($10,928).
In 2024, $61 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($61).
Largest single payer: Pfizer Inc. ($34).
In 2024, $42 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($42).
Largest single payer: Servier Pharmaceuticals LLC ($42).
In 2024, $148 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($148).
Largest single payer: Genentech, Inc. ($148).
Elisa J Stauffer, MD
8110 E 32nd St N Ste 170
Wichita, KS 67226 · (316) 330-9700
License: 04-44074 (KS)
In 2024, $31 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($31).
Largest single payer: USWM, LLC ($17).
Estefania Teron Cosme, MD
Jimmy Everest Center for Cancer and Blood Disorders, 1200 Childrens Avenue
Oklahoma City, OH 73104 · (405) 271-3741
License: 41903 (OK)
In 2024, $100 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($100).
Largest single payer: Alexion Pharmaceuticals, Inc. ($100).
Sayani Tewari
1200 Children's Avenue, Suite 14500
Oklahoma City, OK 73104 · (405) 271-5311
License: 32389 (OK)
In 2023, $109 was disclosed to this physician across 5 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($109).
Ajla Tasleem Wasti, MD
1200 Everett Dr Fl 10
Oklahoma City, OK 73104 · (405) 271-4417
License: 26305 (OK)
Payment totals shown for the latest published program year (2024). Presence of disclosed payments is not, on its own, a conflict of interest. Physicians dispute records directly with CMS (dispute process). How we show this.
Open Payments figures as displayed on . Corrections flow from the manufacturer through CMS and are adopted on our next refresh.
What this page is: a republication of public federal NPI Registry records, filtered to the pediatric hematology-oncology taxonomy. It is not a directory we curate, and inclusion is automatic based on each provider's own NPI filing with CMS. Providers who believe their NPI record is inaccurate should update it directly with CMS at npiregistry.cms.hhs.gov; our next refresh adopts the corrected federal record.
Practice info disclaimer: Provider addresses and phone numbers come from the NPI Registry, which providers update at their discretion. Always call ahead to confirm the provider is currently accepting patients and is at the listed address.
Medical disclaimer: This page is not a quality ranking and does not constitute medical advice or endorsement. Choose a provider in consultation with your primary care physician or care team.
Source: NPI Registry (taxonomy: Pediatric Hematology-Oncology) · Last checked: 2026-04-20