Medical Oncology in Oklahoma
29 licensed medical oncologists practicing in Oklahoma across 13 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 — Medical Oncology in Oklahoma
23 of 29 shown have disclosed payments in CMS Open Payments (2024)
Showing 29 of 29 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.
Dennis Andrew Buck, DO
2500 E Hunt Dr Ste H-J
Show Low, AZ 85901 · (928) 537-6937
License: 011954 (AZ)
In 2024, $171 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($171).
Largest single payer: AbbVie Inc. ($152).
Mathew Amprayil Cherian, MD
800 Ne 10th St Ste 3010
Oklahoma City, OK 73104 · (405) 271-8778
License: 46352 (OK)
Nirmal Choradia, MD
800 Ne 10th St # 2300
Oklahoma City, OK 73104 · (205) 613-4023
License: 43104 (OK)
In 2024, $67 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($67).
Largest single payer: Daiichi Sankyo Inc. ($26).
In 2024, $141 was disclosed to this physician across 7 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($141).
Largest single payer: Gilead Sciences, Inc. ($62).
Muhammad Furqan, MD
800 Ne 10th St Ste B
Oklahoma City, OK 73104 · (405) 271-4022
License: 46256 (OK)
In 2024, $2,718 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly charitable contributions ($2,700) and gifts ($18).
Largest single payer: AbbVie Inc. ($2,700).
Gus Anthony Gonzalez, MD
701 Falling Sky Dr
Edmond, OK 73034 · (417) 544-4147
License: 2014027664 (MO)
In 2024, $2,139 was disclosed to this physician across 85 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($1,939) and gifts ($200).
Largest single payer: Pfizer Inc. ($229).
In 2024, $235 was disclosed to this physician across 11 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($202) and gifts ($32).
Largest single payer: NOVARTIS PHARMACEUTICALS CORPORATION ($52).
In 2024, $442 was disclosed to this physician across 7 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($442).
Largest single payer: Merck Sharp & Dohme LLC ($270).
Danielle N Kramer-Smotherman, DO
4401 McAuley Blvd Ste 2700
Oklahoma City, OK 73120 · (405) 751-4343
License: 8649 (OK)
In 2024, $758 was disclosed to this physician across 36 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($741) and gifts ($17).
Largest single payer: Takeda Pharmaceuticals U.S.A., Inc. ($76).
Manjula Krishnamurthi, MD
1011 Honor Heights Dr
Muskogee, OK 74401 · (918) 680-3619
License: 16869 (OK)
In 2024, $115 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($115).
Largest single payer: E.R. Squibb & Sons, L.L.C. ($115).
Meredith Isabelle Larose
1000 N Lincoln Blvd
Oklahoma City, OK 73104 · (908) 370-8869
License: 43153 (OK)
In 2024, $108 was disclosed to this physician across 5 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($108).
Largest single payer: AstraZeneca Pharmaceuticals LP ($86).
Tariq Mahmood, MD
2828 N Glenhaven Dr
Midwest City, OK 73110 · (405) 732-4893
License: 35C.000982 (OH)
In 2024, $1,561 was disclosed to this physician across 70 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($1,431) and gifts ($131).
Largest single payer: Pfizer Inc. ($256).
Romeo Ang Mandanas, MD
5915 W. Memorial Road, Suite 200
Oklahoma City, OK 73142 · (405) 773-6400
License: 18541 (OK)
In 2024, $4,741 was disclosed to this physician across 20 transactions by pharmaceutical or medical-device companies.
Mostly charitable contributions ($3,139) and category 18 ($1,196).
Largest single payer: Incyte Corporation ($2,580).
Rick G McKinney, DO
500 E Robinson St, Suite 2100
Norman, OK 73071 · (405) 447-8808
License: 2590 (OK)
In 2024, $357 was disclosed to this physician across 16 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($357).
Largest single payer: Genzyme Corporation ($115).
In 2024, $2,644 was disclosed to this physician across 141 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($2,526) and gifts ($117).
Largest single payer: Pfizer Inc. ($224).
Jennifer Lynn O'Stasik, MD
1245 S Utica Ave, 2nd Floor
Tulsa, OK 74104 · (918) 579-3850
License: 24940 (OK)
In 2024, $428 was disclosed to this physician across 21 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($395) and gifts ($32).
Largest single payer: Janssen Biotech, Inc. ($290).
In 2024, $2,831 was disclosed to this physician across 92 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($1,339) and category 18 ($1,098).
Largest single payer: NOVARTIS PHARMACEUTICALS CORPORATION ($1,361).
In 2024, $3,047 was disclosed to this physician across 79 transactions by pharmaceutical or medical-device companies.
Mostly category 18 ($1,180) and entertainment ($1,087).
Largest single payer: NOVARTIS PHARMACEUTICALS CORPORATION ($1,180).
In 2024, $3,680 was disclosed to this physician across 178 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($3,571) and gifts ($109).
Largest single payer: NOVARTIS PHARMACEUTICALS CORPORATION ($486).
In 2024, $244 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($244).
Largest single payer: Intera Oncology, Inc ($124).
In 2024, $2,517 was disclosed to this physician across 28 transactions by pharmaceutical or medical-device companies.
Mostly charitable contributions ($1,873) and entertainment ($644).
Largest single payer: Genzyme Corporation ($1,873).
Aleda A Toma, MD
3525 Nw 56th St, Suite D100
Oklahoma City, OK 73112 · (405) 942-9200
License: OK15340 (OK)
In 2024, $901 was disclosed to this physician across 50 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($779) and gifts ($122).
Largest single payer: Pfizer Inc. ($229).
Susanna V. Ulahannan, MD
609 Virginia Ave
Ponca City, OK 74601 · (580) 767-1300
License: 30484eff (OK)
In 2024, $1,538 was disclosed to this physician across 11 transactions by pharmaceutical or medical-device companies.
Mostly charitable contributions ($1,050) and entertainment ($352).
Largest single payer: AstraZeneca Pharmaceuticals LP ($1,185).
In 2024, $5,834 was disclosed to this physician across 174 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($3,623) and charitable contributions ($1,925).
Largest single payer: BeiGene USA, Inc. ($2,004).
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 medical 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: Medical Oncology) · Last checked: 2026-04-20