Thomas Essex, D.O.
Internal Medicine Physician · Chickasha, OK
Thomas Essex, D.O. is an internal medicine physician with a practice address in Chickasha, Oklahoma, and NPI 1689603151, issued on Jun 30, 2006. Check the license (Oklahoma 3086, as entered in NPPES) on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- Thomas Essex
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 3086 OK
Self-reported in NPPES; status is on the state search - Practice location
- 304 S 29TH St, Chickasha, OK 73018
- Phone
- (405) 896-8058
- Enumerated
- Jun 30, 2006
- Record last updated
- Feb 18, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (844) 965-9881
- Medicaid IDs
- 100202980C OK
201097950A KS - Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,115 in Oklahoma → Look up another NPI →
Also registered at 304 S 29TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Catina Anderson, A-GNP -CAdult Health Nurse Practitioner1811548894
- Andrew Bratton, PT, DPTPhysical Therapist1285917419
- Sara BusterFamily Nurse Practitioner1265972822
- Keely ChapmanPhysical Therapist1952286916
- Jason ClemonsFamily Nurse Practitioner1548678139
- Ross Fisher, MDInternal Medicine Physician1568403087
Verify Thomas Essex in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOklahoma Board of Medical Licensure and Supervision
Search for license 3086Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average internal medicine physician in 2024
879 Medicare Part D claims for 18 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Lisinopril39 claims
- Potassium Chloride39 claims
- Clonidine Hcl36 claims
- Escitalopram Oxalate31 claims
- Lamotrigine31 claims
- Levothyroxine Sodium31 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Thomas Essex among 1,115 internal medicine physician records in Oklahoma
Thomas Essex, D.O. is one of 1,115 internal medicine physician records with a practice address in Oklahoma. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 57% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2020 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
5 internal medicine physician records list a practice address in Chickasha
They are 5 of the 354 NPPES records with a practice address in Chickasha, and 1,115 internal medicine physician records in Oklahoma.
All 1,115 in Oklahoma → Every provider in Chickasha → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Anupama Bekkem, M.D.Chickasha, OK 730181326074485
- Ross Fisher, MDChickasha, OK 730181568403087
- Karen Maluf, MDChickasha, OK 730181689658601
- John Vallandigham, M.D.Chickasha, OK 730181265438501
- Abraham Garcia Ortega, MDNorman, OK 730191336737691
- Micheal MontgomeryCement, OK 730171588450662
- Audrey Goodwin, MDEdmond, OK 730131952661688
- Daniel Lee, MDEdmond, OK 730131336124056
Common questions
What is Thomas Essex, D.O.'s NPI number?
Thomas Essex, D.O.'s National Provider Identifier (NPI) is 1689603151, issued on Jun 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Essex, D.O. located?
The NPPES record lists a practice address at 304 S 29TH St, Chickasha, OK, 73018. Phone: (405) 896-8058. Providers update this record themselves, so call before visiting.
How can I verify Thomas Essex, D.O.'s license?
NPPES lists Oklahoma license number 3086, as entered by the provider. Search the Oklahoma Board of Medical Licensure and Supervision at https://www.okmedicalboard.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Essex, D.O. prescribe under Medicare Part D?
In 2024, Thomas Essex, D.O. had 879 Medicare Part D claims for 18 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
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 Aug 9, 2026.