Hematology & Oncology in Oklahoma
156 licensed hematologist-oncologists practicing in Oklahoma across 36 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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Click a city to filter the 50 providers shown below. Oklahoma has providers in 36 cities total — search the full NPI Registry for cities not shown here.
NPI Registry records — Hematology & Oncology in Oklahoma
41 of 50 shown have disclosed payments in CMS Open Payments (2024)
Showing 50 of 156 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.
Sakher Abdullah, MD
825 Ne 10th St, Oupb 5200
Oklahoma City, OK 73104 · (405) 271-8299
License: 25134 (OK)
In 2024, $341 was disclosed to this physician across 15 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($269) and gifts ($73).
Largest single payer: Genzyme Corporation ($64).
In 2024, $1,131 was disclosed to this physician across 8 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($888) and meals and beverages ($243).
Largest single payer: National Marrow Donor Program ($1,015).
Bashar Samir Alasad, MD
4301 S Western Ave
Oklahoma City, OK 73109 · (405) 631-0919
License: 22539 (OK)
In 2024, $570 was disclosed to this physician across 29 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($354) and gifts ($216).
Largest single payer: Pfizer Inc. ($194).
Haripriya Andanamala, MD
800 Ne 10th St
Oklahoma City, OK 73104 · (405) 271-4022
License: 41526 (OK)
In 2024, $125 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly gifts ($90) and entertainment ($35).
Largest single payer: Incyte Corporation ($90).
Jess Franklin Armor, MD
4401 W Memorial Rd, 2700
Oklahoma City, OK 73134 · (405) 751-4343
License: 22938 (OK)
In 2024, $1,578 was disclosed to this physician across 43 transactions by pharmaceutical or medical-device companies.
Mostly category 18 ($1,000) and entertainment ($529).
Largest single payer: NOVARTIS PHARMACEUTICALS CORPORATION ($1,088).
In 2024, $313 was disclosed to this physician across 17 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($248) and gifts ($65).
Largest single payer: Ferring Pharmaceuticals Inc. ($80).
In 2024, $225 was disclosed to this physician across 11 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($209) and gifts ($16).
Largest single payer: Pfizer Inc. ($59).
Adanma Anji Ayanambakkam Attanathi
920 Stanton L Young Blvd, Wp 1130
Oklahoma City, OK 73104 · (405) 271-5963
License: 31486 (OK)
In 2024, $5,836 was disclosed to this physician across 24 transactions by pharmaceutical or medical-device companies.
Mostly stock or ownership interest ($4,424) and meals and beverages ($777).
Largest single payer: Pfizer Inc. ($5,587).
In 2024, $1,251 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly charitable contributions ($1,225) and entertainment ($26).
Largest single payer: AstraZeneca Pharmaceuticals LP ($1,225).
In 2024, $295 was disclosed to this physician across 12 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($295).
Largest single payer: Genzyme Corporation ($64).
In 2024, $32 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($32).
Largest single payer: Boston Scientific Corporation ($32).
Ashtami Vishwanath Banavali, MD
430 N Monte Vista St
Ada, OK 74820 · (580) 421-1141
License: 32636 (OK)
In 2024, $1,679 was disclosed to this physician across 92 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($1,445) and gifts ($234).
Largest single payer: Pfizer Inc. ($344).
In 2024, $1,563 was disclosed to this physician across 81 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($1,563).
Largest single payer: Pfizer Inc. ($193).
Ulas Darda Bayraktar, MD
3825 Teays Valley Rd Ste 5
Hurricane, WV 25526 · (304) 388-4949
License: 28598 (WV)
In 2024, $403 was disclosed to this physician across 21 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($403).
Largest single payer: NOVARTIS PHARMACEUTICALS CORPORATION ($73).
Richard Harold Bottomley, MD
4301 S Western Ave
Oklahoma City, OK 73109 · (405) 631-0919
License: 7300 (OK)
Abby R Bova, MD
4205 McAuley Blvd, Ste 375
Oklahoma City, OK 73120 · (405) 751-4343
License: 22544 (OK)
In 2024, $1,729 was disclosed to this physician across 60 transactions by pharmaceutical or medical-device companies.
Mostly category 18 ($1,000) and entertainment ($531).
Largest single payer: NOVARTIS PHARMACEUTICALS CORPORATION ($1,049).
Leonard Michael Bowen, MD
1011 N Dewey Ave, 100
Oklahoma City, OK 73102 · (405) 228-7100
License: 11976 (OK)
In 2024, $445 was disclosed to this physician across 34 transactions by pharmaceutical or medical-device companies.
Mostly gifts ($298) and entertainment ($147).
Largest single payer: Pfizer Inc. ($317).
In 2024, $264 was disclosed to this physician across 19 transactions by pharmaceutical or medical-device companies.
Mostly gifts ($160) and entertainment ($104).
Largest single payer: Pfizer Inc. ($146).
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).
In 2024, $26 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($26).
Largest single payer: ACADIA Pharmaceuticals Inc ($26).
Vikki Ann Canfield, MD
4205 McAuley Blvd, 375
Oklahoma City, OK 73120 · (405) 751-4343
License: 17952 (OK)
In 2023, $22 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($22).
In 2024, $2,494 was disclosed to this physician across 128 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($2,115) and gifts ($279).
Largest single payer: Pfizer Inc. ($455).
Janae Michelle Clapp, MD
5915 W Memorial Rd Ste 200
Oklahoma City, OK 73142 · (405) 773-6400
License: 22724 (OK)
In 2024, $1,196 was disclosed to this physician across 12 transactions by pharmaceutical or medical-device companies.
Mostly category 18 ($1,196).
Largest single payer: NOVARTIS PHARMACEUTICALS CORPORATION ($1,196).
In 2024, $1,561 was disclosed to this physician across 74 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($1,331) and gifts ($230).
Largest single payer: Pfizer Inc. ($241).
In 2024, $482 was disclosed to this physician across 10 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($482).
Largest single payer: ImmunityBio, Inc. ($150).
Philip C Comp, MD
825 Ne 10th St, Oupb 5200
Oklahoma City, OK 73104 · (405) 271-8299
License: 10245 (OK)
In 2024, $212 was disclosed to this physician across 8 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($212).
Largest single payer: scPharmaceuticals Inc. ($67).
Kathy Kernek Dagg, MD
701 E Robinson St, Suite a 100
Norman, OK 73071 · (405) 321-4644
License: 14425 (OK)
In 2024, $36 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($36).
Largest single payer: AbbVie Inc. ($36).
Andre Luiz Pitanga Bastos De Souza, MD
800 Ne 10th St Ste B
Oklahoma City, OK 73104 · (405) 271-4022
License: 46042 (OK)
In 2023, $21 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly gifts ($21).
Francisco Huguet Dexeus, MD
825 East Owen K Garriott Rd
Enid, OK 73701 · (580) 234-1061
License: 18814 (OK)
Graca Maria Dores, MD, MPH
921 Ne 13th St, Veterans Affairs Medical Center
Oklahoma City, OK 73104 · (405) 270-0501
License: 8182 (RI)
In 2024, $538 was disclosed to this physician across 22 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($522) and gifts ($16).
Largest single payer: AstraZeneca Pharmaceuticals LP ($216).
Sherri Lynn Durica, MD
701 E Robinson St, Suite a 100
Norman, OK 73071 · (405) 321-4644
License: 16564 (OK)
In 2023, $64 was disclosed to this physician across 4 transactions by pharmaceutical or medical-device companies.
Mostly gifts ($64).
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).
In 2024, $772 was disclosed to this physician across 24 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($772).
Largest single payer: Mallinckrodt Hospital Products Inc. ($144).
Robert B Epstein, MD
825 Ne 10th St, Oupb 5200
Oklahoma City, OK 73104 · (405) 271-8299
License: 13450 (OK)
Erin Elaine Ezzell, DO
800 Ne 10th St Fl 6
Oklahoma City, OK 73104 · (405) 271-4022
License: 8800 (OK)
In 2024, $125 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($125).
Largest single payer: E.R. Squibb & Sons, L.L.C. ($125).
Muhammad Salman Faisal, MD
800 Ne 10th St # 2d
Oklahoma City, OK 73104 · (405) 271-8001
License: 42991 (OK)
In 2024, $307 was disclosed to this physician across 4 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($307).
Largest single payer: AstraZeneca Pharmaceuticals LP ($136).
In 2024, $1,189 was disclosed to this physician across 65 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($985) and gifts ($204).
Largest single payer: Pfizer Inc. ($320).
Ralph Gershon Ganick, MD
1011 N Dewey Ave, Suite 100
Oklahoma City, OK 73102 · (405) 228-7100
License: 11667 (OK)
In 2024, $332 was disclosed to this physician across 17 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($332).
Largest single payer: Pfizer Inc. ($60).
Brian Vincent Geister, MD
5915 W Memorial Road, 200
Oklahoma City, OK 73142 · (405) 773-6400
License: 14286 (OK)
In 2024, $258 was disclosed to this physician across 22 transactions by pharmaceutical or medical-device companies.
Mostly gifts ($239) and entertainment ($19).
Largest single payer: Pfizer Inc. ($234).
James N George, MD
825 Ne 10th St, Oupb 5200
Oklahoma City, OK 73104 · (405) 271-8299
License: 17407 (OK)
In 2023, $71 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($71).
In 2024, $1,878 was disclosed to this physician across 80 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($1,771) and gifts ($107).
Largest single payer: AstraZeneca Pharmaceuticals LP ($222).
In 2024, $314 was disclosed to this physician across 6 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($314).
Largest single payer: Genzyme Corporation ($184).
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).
Stephen A Hamilton, MD
230 N Midwest Blvd
Midwest City, OK 73110 · (405) 737-8455
License: 18028 (OK)
Sanjaykumar Jagdishbhai Hapani, MD
13301 N Meridian Ave, Suite 501
Edmond, OK 73120 · (405) 752-0872
License: 29637 (OK)
In 2024, $11,150 was disclosed to this physician across 133 transactions by pharmaceutical or medical-device companies.
Mostly charitable contributions ($4,875) and consulting fees ($3,150).
Largest single payer: Sun Pharmaceutical Industries Inc. ($3,606).
Showing 50 of 156. Search all on NPI Registry →
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 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: Hematology & Oncology) · Last checked: 2026-04-20