Chadwick Leon Simpson, M. D.
Emergency Medicine Physician · Harrison, AR
Chadwick Leon Simpson, M. D. is an emergency medicine physician with a practice address in Harrison, Arkansas, and NPI 1508990730, issued on Mar 16, 2007. Check the license (Arkansas E5205, as entered in NPPES) on the Arkansas State Medical Board; the Medicare figures below come from public CMS files.
- Name
- Chadwick Leon Simpson
- Credential
- M. D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- E5205 AR
Self-reported in NPPES; status is on the state search - Practice location
- 511 Owl St, Harrison, AR 72601
- Phone
- (903) 280-8889
- Enumerated
- Mar 16, 2007
- Record last updated
- Jan 7, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20071212000346); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 447 in Arkansas → Look up another NPI →
Verify Chadwick Leon Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArkansas State Medical Board
Search for license E5205Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average emergency medicine physician in 2024
536 Medicare Part D claims for 322 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Cephalexin114 claims
- Methylprednisolone113 claims
- Clindamycin Hcl69 claims
- Ondansetron Odt50 claims
- Ketorolac Tromethamine46 claims
- Azithromycin41 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.
Bills Medicare through one group practice
- Ozark Health, IncClinton, AR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chadwick Leon Simpson among 447 emergency medicine physician records in Arkansas
Chadwick Leon Simpson, M. D. is one of 447 emergency medicine physician records with a practice address in Arkansas. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 42% of them.
- NPI issued2007 · 42% of these records are older, 50% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2000 · median 2011 among the 301 with a school on file
- Record last updated2016 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Arkansas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 emergency medicine physician records list a practice address in Harrison
They are 8 of the 668 NPPES records with a practice address in Harrison, and 447 emergency medicine physician records in Arkansas.
All 447 in Arkansas → Every provider in Harrison → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Todd Baker, MDHarrison, AR 726011801874698
- Timothy Costello, MDHarrison, AR 726011235195785
- Raymond Griffith, DOHarrison, AR 726011700820602
- Yevheniy Lider, MDHarrison, AR 726011033593629
- Peter Maningas, MDHarrison, AR 726011730135815
- Jacob Roberts, DOHarrison, AR 726011265474472
- Bryan Shearer, M.D.Harrison, AR 726011992048037
- Joe Brown, MDBerryville, AR 726161508327727
Common questions
What is Chadwick Leon Simpson, M. D.'s NPI number?
Chadwick Leon Simpson, M. D.'s National Provider Identifier (NPI) is 1508990730, issued on Mar 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Chadwick Leon Simpson, M. D. located?
The NPPES record lists a practice address at 511 Owl St, Harrison, AR, 72601. Phone: (903) 280-8889. Providers update this record themselves, so call before visiting.
How can I verify Chadwick Leon Simpson, M. D.'s license?
NPPES lists Arkansas license number E5205, as entered by the provider. Search the Arkansas State Medical Board at https://armedicalboard.adh.arkansas.gov/public/verify/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Chadwick Leon Simpson, M. D. prescribe under Medicare Part D?
In 2024, Chadwick Leon Simpson, M. D. had 536 Medicare Part D claims for 322 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.