Alexander Gayle Parker, MD
Emergency Medicine Physician · Festus, MO
Alexander Gayle Parker, MD is an emergency medicine physician with a practice address in Festus, Missouri, and NPI 1689177743, issued on Mar 15, 2018. Check the license (Missouri 2021047265, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Alexander Gayle Parker
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 2021047265 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1400 US Highway 61, Festus, MO 63028
- Phone
- (636) 933-1000
- Enumerated
- Mar 15, 2018
- Record last updated
- Jun 13, 2024
- Medicare enrollment
- Enrolled (PECOS I20240401002322); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,405 in Missouri → Look up another NPI →
Also registered at 1400 US Highway 61
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alexander Gayle Parker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2021047265Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% fewer Medicare Part D claims than the average emergency medicine physician in 2024
150 Medicare Part D claims for 103 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 29 claims were for opioids.
Most prescribed
- Oxycodone Hcl25 claims
- Ondansetron Odt13 claims
- Azithromycin11 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.
Industry payments in 2024: $58.50
2 payments; by number, the most common kind was food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital affiliation
- Mercy Hospital JeffersonFestus, MO · Acute Care Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Alexander Gayle Parker among 1,405 emergency medicine physician records in Missouri
Alexander Gayle Parker, MD is one of 1,405 emergency medicine physician records with a practice address in Missouri. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 75% of them.
- NPI issued2018 · 75% of these records are older, 21% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2020 · median 2012 among the 808 with a school on file
- Record last updated2024 · 48% 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 Missouri 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 Festus
They are 8 of the 706 NPPES records with a practice address in Festus, and 1,405 emergency medicine physician records in Missouri.
All 1,405 in Missouri → Every provider in Festus → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Andrew Harrelson, MDFestus, MO 630281831833151
- Brian Heberer, D.O.Festus, MO 630281588004329
- Erik Hume, DOFestus, MO 630281689052904
- Basem Khishfe, M.D.Festus, MO 630281760790802
- Nicholas Littman, MDFestus, MO 630281770993875
- Michael Pajor, MDFestus, MO 630281457977035
- Bryan Vahey, DOFestus, MO 630281134867039
- Kathryn Getzewich, MDFenton, MO 630261831394790
Common questions
What is Alexander Gayle Parker, MD's NPI number?
Alexander Gayle Parker, MD's National Provider Identifier (NPI) is 1689177743, issued on Mar 15, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Alexander Gayle Parker, MD located?
The NPPES record lists a practice address at 1400 US Highway 61, Festus, MO, 63028. Phone: (636) 933-1000. Providers update this record themselves, so call before visiting.
How can I verify Alexander Gayle Parker, MD's license?
NPPES lists Missouri license number 2021047265, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alexander Gayle Parker, MD prescribe under Medicare Part D?
In 2024, Alexander Gayle Parker, MD had 150 Medicare Part D claims for 103 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.