Derek Ailes, M.D.
Emergency Medicine Physician · Walnut Creek, CA
Derek Ailes, M.D. is an emergency medicine physician with a practice address in Walnut Creek, California, and NPI 1992001804, issued on Feb 10, 2011. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Derek Ailes
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- Practice location
- 1425 S Main St, Walnut Creek, CA 94596
- Phone
- (925) 295-4000
- Enumerated
- Feb 10, 2011
- Entity
- Type 1 · individual
Also registered at 1425 S Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Eric AaserudeEmergency Medicine Physician1811491194
- Derek Abbassi, MDObstetrics & Gynecology Physician1841364155
- Peter Ackerman, MDEmergency Medicine Physician1427435023
- Aaron Mark Acosta, DOStudent in an Organized Health Care Education/Training Program1538789987
- Basil Adad, MDOtolaryngology Physician1487732574
- Jacqueline Alkire, NPAdult Health Nurse Practitioner1902890114
Verify Derek Ailes in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
21% fewer Medicare Part D claims than the average emergency medicine physician in 2024
279 Medicare Part D claims for 197 beneficiaries, against an average of 355 among the 49,029 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 30 claims were for opioids.
Most prescribed
- Prednisone22 claims
- Hydrocodone-Acetaminophen21 claims
- Amoxicillin-Clavulanate Potass15 claims
- Cefadroxil14 claims
- Doxycycline Monohydrate14 claims
- Ibuprofen14 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.
95 emergency medicine physician records list a Walnut Creek practice address
They are 95 of the 6,170 NPPES records with a Walnut Creek practice address, and 7,133 emergency medicine physician records in California.
All 95 in Walnut Creek → All 7,133 in California → Every provider in Walnut Creek →
Other emergency medicine physician records in California
- Cooper Aakhus, MDStanford, CA1194351007
- Pyra Aarden, MDMartinez, CA1417058199
- Neal Aaron, D.O.Encinitas, CA1114283520
- Eric AaserudeWalnut Creek, CA1811491194
- Nader Abas, MDBarstow, CA1346288305
- Michael Abbo, MDNovato, CA1205819042
- Daniel Abbott, MDFullerton, CA1518907864
- Paul-Andre Abboud, M.D.Oakland, CA1710065503
- Mostafa Abdel-Hamid, MDStanford, CA1457918740
- Ashraf Abdel-KerimChino, CA1396961538
Common questions
What is Derek Ailes, M.D.'s NPI number?
Derek Ailes, M.D.'s National Provider Identifier (NPI) is 1992001804, issued on Feb 10, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Derek Ailes, M.D. located?
The NPPES record lists a practice address at 1425 S Main St, Walnut Creek, CA, 94596. Phone: (925) 295-4000. Providers update this record themselves, so call before visiting.
How can I verify Derek Ailes, M.D.'s license?
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 Derek Ailes, M.D. prescribe under Medicare Part D?
In 2024, Derek Ailes, M.D. had 279 Medicare Part D claims for 197 beneficiaries; the average among emergency medicine physician prescribers was 355. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.