NPPES file of Aug 9, 2026

Oklahoma Medicare prescriber rankings

14,439 Oklahoma prescribers billed $3.3 billion in Medicare Part D drugs in 2024, the 28th largest of 56 states and territories. Opioids were 4.76 of every 100 of those claims (CMS), above the national 3.52.

CMS Medicare Part D Prescribers, 2024; CMS NPPES · method · Verify with CMS →

Written with AI tools from the named public files; every figure is computed from those files (how it is made).
  • Prescribers14,439
  • Part D drug cost$3.3 billion
  • Average per prescriber$228,650
  • Wrote an opioid (CMS)8,500 (58.86%)
  • Opioid claims per 100 claims (CMS)4.76

Reading the Oklahoma tables

Oklahoma's 14,439 prescribers wrote 20,886,527 Part D claims in 2024, about $228,650 in drug cost per prescriber. A high total usually reflects specialty practice, such as cancer, rheumatology or HIV care, or vaccines: 2 of the 50 largest totals are mostly vaccines, which pharmacies often bill under a standing order naming one clinician. These are billing tables, not quality ratings. PlainDoctor does not rank named prescribers by opioid share; the state's opioid figures above come from CMS's own totals.

The 50 highest Part D drug-cost totals

Prescriber (NPPES taxonomy)Drug costClaims
1John KingreyPulmonary Disease Physician$37.3 million6,394
2Robert MortonPsychiatry Physician$35.2 million115,669
3Sanjaykumar HapaniHematology & Oncology Physician$18.2 million3,787
4Cherian KarunapuzhaNeurology Physician$12.6 million11,258
5Al-Ola AbdallahInternal Medicine Physician$10.9 million2,171
6Adanma Anji Ayanambakkam AttanathiHematology & Oncology Physician$10.1 million2,040
7Fahed HamadehRheumatology Physician$9.5 million11,358
8Scott ColeHematology & Oncology Physician$9.4 million2,996
9Thomas ShowalterInternal Medicine Physician$8.3 million2,222
10Terence CareyAllergy & Immunology Physician$8.1 million5,498
11James KrablinInternal Medicine Physician$8.0 million115,333
12Caleb ScheckelHematology & Oncology Physician$7.7 million2,026
13Jason McElyeaFamily Medicine Physicianmostly vaccines, often billed by pharmacies under a standing order naming this clinician$7.6 million44,214
14Jeremy MorganFamily Nurse Practitioner$7.4 million3,455
15Michael KeeferHematology & Oncology Physician$7.3 million2,241
16Mark OatmanFamily Medicine Physicianmostly vaccines, often billed by pharmacies under a standing order naming this clinician$7.3 million43,237
17Jess ArmorHematology & Oncology Physician$7.3 million2,775
18Ali MoussaHematology & Oncology Physician$7.2 million4,171
19Jane PurserAllergy Physician$7.1 million2,154
20Huong HuynhNurse Practitioner$6.8 million6,763
21Morgan MuellerPhysician Assistant$6.7 million3,620
22Jack BrownFamily Medicine Physician$6.7 million97,149
23Hassan KaleemHematology & Oncology Physician$6.6 million1,574
24Charles TaylorHematology & Oncology Physician$6.4 million2,323
25Than AyeHematology & Oncology Physician$6.3 million1,827
26Mickey TyrrellFamily Medicine Physician$6.3 million21,882
27Matthew ArmstrongHematology & Oncology Physician$6.3 million3,151
28Shoab NazirPulmonary Disease Physician$6.1 million7,689
29Randall WebbNeurology Physician$6.1 million4,461
30Johnny McMinnHematology & Oncology Physician$6.1 million2,064
31Omar SilvestreRheumatology Physician$5.9 million5,374
32Zubair AshrafHospitalist Physician$5.8 million4,147
33Brent BesonNeurology Physician$5.6 million1,302
34Joel HortonRheumatology Physician$5.5 million4,710
35Sanober MalikInternal Medicine Physician$5.5 million3,558
36William SurbeckRheumatology Physician$5.5 million5,624
37Jordan MortonHematology & Oncology Physician$5.4 million2,807
38Steven StroudAdvanced Heart Failure and Transplant Cardiology Physician$5.3 million2,131
39Masood GhouseHematology & Oncology Physician$5.3 million1,971
40Syed HassanyHematology & Oncology Physician$5.3 million2,081
41Ronald CableFamily Medicine Physician$5.2 million55,227
42J RosenhamerNeurology Physician$5.2 million9,563
43Jad KebbePulmonary Disease Physician$5.2 million1,683
44Robert ReynoldsHematology & Oncology Physician$5.1 million2,224
45Manuel CalvinRheumatology Physician$5.1 million13,340
46Pamela CravenCardiovascular Disease Physician$4.9 million14,696
47Aleda TomaMedical Oncology Physician$4.9 million3,502
48Prashant KaushikInternal Medicine Physician$4.9 million1,427
49William SchnitzRheumatology Physician$4.8 million3,987
50Leonard BowenHematology & Oncology Physician$4.8 million1,808

Source: CMS Medicare Part D Prescribers by Provider, 2024 (data.cms.gov), matched to CMS NPPES by NPI; vaccine share from the prescriber's top drugs in the CMS by-provider-and-drug file. Specialty is the taxonomy the clinician reported to NPPES.

Common questions

How many Medicare prescribers are in Oklahoma?

Oklahoma has 14,439 Medicare Part D prescribers who filed 20,886,527 claims totaling $3.3 billion in drug costs.

What is the opioid prescribing rate in Oklahoma?

Opioids were 4.76 of every 100 Medicare Part D claims written by Oklahoma prescribers in 2024, against 3.52 nationally (CMS). 8,500 of the state's 14,441 Part D prescribers in CMS's geography file (58.86%) wrote at least one opioid.

Checking a prescriber

Open the prescriber's record for the full NPI entry and prescribing detail, then confirm the license on the state board search. The Part D file covers Medicare Part D only; commercial, Medicaid, VA and cash prescriptions are not in it.

Prescriber rankings in other states

  1. Alabama
  2. Alaska
  3. American Samoa
  4. Arizona
  5. Arkansas
  6. California
  7. Colorado
  8. Connecticut
  9. Delaware
  10. District of Columbia
  11. Florida
  12. Georgia
  13. Guam
  14. Hawaii
  15. Idaho
  16. Illinois
  17. Indiana
  18. Iowa
  19. Kansas
  20. Kentucky
  21. Louisiana
  22. Maine
  23. Maryland
  24. Massachusetts
  25. Michigan
  26. Minnesota
  27. Mississippi
  28. Missouri
  29. Montana
  30. Nebraska
  31. Nevada
  32. New Hampshire
  33. New Jersey
  34. New Mexico
  35. New York
  36. North Carolina
  37. North Dakota
  38. Northern Mariana Islands
  39. Ohio
  40. Oklahoma
  41. Oregon
  42. Pennsylvania
  43. Puerto Rico
  44. Rhode Island
  45. South Carolina
  46. South Dakota
  47. Tennessee
  48. Texas
  49. Utah
  50. Vermont
  51. Virgin Islands
  52. Virginia
  53. Washington
  54. West Virginia
  55. Wisconsin
  56. Wyoming

National prescriber rankings · All rankings

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Medicare Part D data year 2024 (CMS).