Nathan Alley-Byrd, MD
Emergency Medicine Physician · San Diego, CA
Nathan Alley-Byrd, MD is an emergency medicine physician with a practice address in San Diego, California, and NPI 1558924274, issued on Apr 18, 2019. Check the license (California A181508, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nathan Alley-Byrd
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- A181508 CA
01084351A IN
Self-reported in NPPES; status is on the state search - Practice location
- Navy Medical Center San Diego 34800 Bob Wilson Drive, San Diego, CA 92134
- Phone
- (619) 532-6400
- Enumerated
- Apr 18, 2019
- Record last updated
- Apr 24, 2025
- Medicare enrollment
- Enrolled (PECOS I20251103000498); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Verify Nathan Alley-Byrd in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A181508Check 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
21 Medicare Part D claims for 13 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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
- Cook CountyChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathan Alley-Byrd among 7,751 emergency medicine physician records in California
Nathan Alley-Byrd, 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 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2019 · median 2011 among the 4,560 with a school on file
- Record last updated2025 · 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).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in San Diego → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Jonathan Auten, D.O.San Diego, CA 921341134190259
- Robert Buckley, MDSan Diego, CA 921341194796417
- Gerard Demers, D.O.San Diego, CA 921341487626032
- David Durkovich, D.O.San Diego, CA 921341932179199
- Adam Field, MDSan Diego, CA 921341780649848
- Miguel Gutierrez, M.D.San Diego, CA 921341265402648
- Eric Herbert, MDSan Diego, CA 921341497727598
- Nicole Hurst, MDSan Diego, CA 921341174502785
Common questions
What is Nathan Alley-Byrd, MD's NPI number?
Nathan Alley-Byrd, MD's National Provider Identifier (NPI) is 1558924274, issued on Apr 18, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Nathan Alley-Byrd, MD located?
The NPPES record lists a practice address at Navy Medical Center San Diego 34800 Bob Wilson Drive, San Diego, CA, 92134. Phone: (619) 532-6400. Providers update this record themselves, so call before visiting.
How can I verify Nathan Alley-Byrd, MD's license?
NPPES lists California license number A181508, 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 Nathan Alley-Byrd, MD prescribe under Medicare Part D?
In 2024, Nathan Alley-Byrd, MD had 21 Medicare Part D claims for 13 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.