W. Byron Mitchell, M.D.
Emergency Medicine Physician · Oceanside, CA
W. Byron Mitchell, M.D. is an emergency medicine physician with a practice address in Oceanside, California, and NPI 1023003449, issued on Sep 12, 2005. Check the license (California A25315, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- W. Byron Mitchell
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A25315 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4002 Vista Way, Oceanside, CA 92056
- Phone
- (760) 940-3505
- Enumerated
- Sep 12, 2005
- Record last updated
- Jul 15, 2013 (not updated in 13 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 4002 Vista Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Alaynick, M.D.Emergency Medicine Physician1073507174
- Matthew Allen, PA-CMedical Physician Assistant1770963589
- David Antoun, MDInternal Medicine Physician1043573785
- Hermineh AraminCytopathology Physician1821451444
- Allison Auchter, MD, PHDEmergency Medical Services (Emergency Medicine) Physician1013595248
- Romana Bailey, M.D.Neonatal-Perinatal Medicine Physician1396023685
Verify W. Byron Mitchell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A25315Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average emergency medicine physician in 2024
20 Medicare Part D claims, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 60% of 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.
W. Byron Mitchell among 7,751 emergency medicine physician records in California
W. Byron Mitchell, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 96% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2013 · 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).
50 emergency medicine physician records list a practice address in Oceanside
They are 50 of the 3,438 NPPES records with a practice address in Oceanside, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Oceanside → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Michael Alaynick, M.D.Oceanside, CA 920561073507174
- Dorothy Brown, M.D.Oceanside, CA 920561710971643
- Randall Browning, M.D.Oceanside, CA 920561629062559
- John Bushong, M.D.Oceanside, CA 920561235123050
- Reid Conant, M.D.Oceanside, CA 920561255326351
- Michael Forman, M.D.Oceanside, CA 920561992790661
- Steven Gabriel, M.D.Oceanside, CA 920561780679464
- Darin Garner, M.D.Oceanside, CA 920561275535874
Common questions
What is W. Byron Mitchell, M.D.'s NPI number?
W. Byron Mitchell, M.D.'s National Provider Identifier (NPI) is 1023003449, issued on Sep 12, 2005. An NPI identifies a provider in billing; it is not a license.
Where is W. Byron Mitchell, M.D. located?
The NPPES record lists a practice address at 4002 Vista Way, Oceanside, CA, 92056. Phone: (760) 940-3505. Providers update this record themselves, so call before visiting.
How can I verify W. Byron Mitchell, M.D.'s license?
NPPES lists California license number A25315, 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 W. Byron Mitchell, M.D. prescribe under Medicare Part D?
In 2024, W. Byron Mitchell, M.D. had 20 Medicare Part D claims; 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.