Registry data as of Aug 27, 2026

Stephen Anderson, M.D

Emergency Medicine Physician · Apple Valley, CA

Stephen Anderson, M.D is an emergency medicine physician with a practice address in Apple Valley, California, and NPI 1659554194, issued on Dec 6, 2007. Check the license (California A81689, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, loaded Aug 27, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1659554194
Name
Stephen Anderson
Credential
M.D
Primary taxonomy
Emergency Medicine Physician 207P00000X
License numbers
A81689 CA
ME154012 FL
Self-reported in NPPES; status is on the state search
Practice location
18300 US Highway 18, Apple Valley, CA 92307
Phone
(760) 242-2311
Enumerated
Dec 6, 2007
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 18300 US Highway 18

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ashley AcasioElectroneurodiagnostic Specialist/Technologist1780511485
  2. Michael Adams, CNIMElectroneurodiagnostic Specialist/Technologist1750218418
  3. Samuel AdvinculaFamily Nurse Practitioner1962868844
  4. Kabir Ahmed, M.D.Anesthesiology Physician1659315729
  5. Katherine Alconcel, D.O.Internal Medicine Physician1376864215
  6. Robert Anderson, CRNACertified Registered Nurse Anesthetist1003010182

Verify Stephen Anderson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A81689    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Statewide context: the Medical Board of California reported 374 disciplinary actions in FY 2022-23. California discipline data →

40% fewer Medicare Part D claims than the average emergency medicine physician in 2024

214 Medicare Part D claims for 177 beneficiaries, against an average of 355 among the 49,029 providers of this specialty who prescribed in Part D. 36 claims were for opioids.

  1. Stephen Anderson214
  2. Specialty average355

Most prescribed

  1. Hydrocodone-Acetaminophen27 claims
  2. Cephalexin26 claims
  3. Methylprednisolone21 claims
  4. Ondansetron Odt20 claims
  5. Sulfamethoxazole-Trimethoprim14 claims
  6. Ciprofloxacin Hcl12 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.

One hospital or facility affiliation

  1. Cep America LLCJacksonville, FL

Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Emergency Medicine Physician providers in California

There are 7,133 emergency medicine physician records in California.

All 7,133 in California → Every provider in Apple Valley →

Other emergency medicine physician records in California

  1. Cooper Aakhus, MDStanford, CA1194351007
  2. Pyra Aarden, MDMartinez, CA1417058199
  3. Neal Aaron, D.O.Encinitas, CA1114283520
  4. Eric AaserudeWalnut Creek, CA1811491194
  5. Nader Abas, MDBarstow, CA1346288305
  6. Michael Abbo, MDNovato, CA1205819042
  7. Daniel Abbott, MDFullerton, CA1518907864
  8. Paul-Andre Abboud, M.D.Oakland, CA1710065503
  9. Mostafa Abdel-Hamid, MDStanford, CA1457918740
  10. Ashraf Abdel-KerimChino, CA1396961538

Common questions

What is Stephen Anderson, M.D's NPI number?

Stephen Anderson, M.D's National Provider Identifier (NPI) is 1659554194, issued on Dec 6, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Stephen Anderson, M.D located?

The NPPES record lists a practice address at 18300 US Highway 18, Apple Valley, CA, 92307. Phone: (760) 242-2311. Providers update this record themselves, so call before visiting.

How can I verify Stephen Anderson, M.D's license?

NPPES lists California license number A81689, 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 Stephen Anderson, M.D prescribe under Medicare Part D?

In 2024, Stephen Anderson, M.D had 214 Medicare Part D claims for 177 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.

Compiled from official public sources by the editorial process.

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.