Gregory Sampson Powell, MD
Emergency Medicine Physician · Orange, CA
Gregory Sampson Powell, MD is an emergency medicine physician with a practice address in Orange, California, and NPI 1669834610, issued on Mar 28, 2016. Check the license (California A151368, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Sampson Powell
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A151368 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1310 W Stewart Dr Ste 212, Orange, CA 92868
- Phone
- (714) 543-8911
- Enumerated
- Mar 28, 2016
- Record last updated
- Oct 2, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20181205002520); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 2016
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1310 W Stewart Dr Ste 212
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Justin Anderson, M.D.Emergency Medicine Physician1659534121
- Nelson Bansil, D.O.Pediatric Emergency Medicine (Pediatrics) Physician1700092426
- Danielle Chater LeaPhysician Assistant1083331078
- Katie Doering, MDEmergency Medicine Physician1528488970
- Christian MillerPhysician Assistant1225679681
- John NishiokaPhysician Assistant1316656416
Verify Gregory Sampson Powell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A151368Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average emergency medicine physician in 2024
637 Medicare Part D claims for 377 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 61 claims were for opioids.
Most prescribed
- Ondansetron Odt73 claims
- Cephalexin59 claims
- Famotidine58 claims
- Oxycodone-Acetaminophen55 claims
- Naproxen27 claims
- Cyclobenzaprine Hcl22 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
- Emergency Medicine Specialists OF Orange CountyOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Sampson Powell among 7,751 emergency medicine physician records in California
Gregory Sampson Powell, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 75% of them.
- NPI issued2016 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2016 · median 2011 among the 4,560 with a school on file
- Record last updated2020 · 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
179 emergency medicine physician records list a practice address in Orange
They are 179 of the 13,245 NPPES records with a practice address in Orange, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Orange → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Michael Anderson, MDOrange, CA 928681093747750
- Rishi Bhargava, MDOrange, CA 928681407811623
- Jonathan Blair, MDOrange, CA 928681891727954
- Bharath Chakravarthy, MDOrange, CA 928681144259839
- Elizabeth Fiedler, MDOrange, CA 928681578594529
- Jeffrey Hughes, MDOrange, CA 928681871525949
- Michael Menchine, MDOrange, CA 928681912963612
- David Merin, MDOrange, CA 928681811929979
Common questions
What is Gregory Sampson Powell, MD's NPI number?
Gregory Sampson Powell, MD's National Provider Identifier (NPI) is 1669834610, issued on Mar 28, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Sampson Powell, MD located?
The NPPES record lists a practice address at 1310 W Stewart Dr Ste 212, Orange, CA, 92868. Phone: (714) 543-8911. Providers update this record themselves, so call before visiting.
How can I verify Gregory Sampson Powell, MD's license?
NPPES lists California license number A151368, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Sampson Powell, MD prescribe under Medicare Part D?
In 2024, Gregory Sampson Powell, MD had 637 Medicare Part D claims for 377 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.