NPPES file of Aug 9, 2026

Amanda Stephenson, MD

Emergency Medicine Physician · San Ramon, CA

Amanda Stephenson, MD is an emergency medicine physician with a practice address in San Ramon, California, and NPI 1609172451, issued on Jan 26, 2011. Check the license (California A135576, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1609172451
Name
Amanda Stephenson
Credential
MD
Primary taxonomy
Emergency Medicine Physician 207P00000X
License number
A135576 CA
Self-reported in NPPES; status is on the state search
Practice location
6001 Norris Canyon RD, San Ramon, CA 94583
Phone
(925) 275-8280
Enumerated
Jan 26, 2011
Record last updated
May 8, 2019 (not updated in 7 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20160630001122); accepts Medicare assignment
Medical or professional school
University Of Pittsburgh School Of Medicine, 2010
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 6001 Norris Canyon RD

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

  1. Maureen Alford, RNStudent in an Organized Health Care Education/Training Program1831522978
  2. Masoud Asgari, M.D.Dermatopathology (Pathology) Physician1467806356
  3. Miguel Ayala, NPFamily Nurse Practitioner1538446448
  4. Bailey BrewerHand Occupational Therapist1720294648
  5. Carl Critz, MDCytopathology Physician1740232107
  6. Gerardine Cruz, PA-CSurgical Physician Assistant1619104601

Verify Amanda Stephenson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A135576
    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.

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27% fewer Medicare Part D claims than the average emergency medicine physician in 2024

165 Medicare Part D claims for 109 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 33 claims were for opioids.

  1. Amanda Stephenson165
  2. Specialty average226

Most prescribed

  1. Ondansetron Odt28 claims
  2. Hydrocodone-Acetaminophen23 claims
  3. Amoxicillin-Clavulanate Potass16 claims
  4. Cephalexin11 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

  1. Team Physicians OF Northern California Medical Group IncSan Ramon, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Amanda Stephenson among 7,751 emergency medicine physician records in California

Amanda Stephenson, 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 2011, is newer than 60% of them.

  • NPI issued2011 · 60% of these records are older, 37% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 59% of these records are
  • Graduated2010 · median 2011 among the 4,560 with a school on file
  • Record last updated2019 · 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.

The 8 emergency medicine physician records with the nearest ZIP codes

  1. Saba Haq, MDSan Ramon, CA 945831669460085
  2. Samuel Katz, M.D.San Ramon, CA 945831447469424
  3. Diane Mimran, MDSan Ramon, CA 945831285670877
  4. Monica Rosenthal, MDSan Ramon, CA 945831295783744
  5. Heng Tang, M.D.San Ramon, CA 945831801185467
  6. Randeep Thiara, M.D.San Ramon, CA 945831578853297
  7. Joseph Toscano, M.D.San Ramon, CA 945831619944360
  8. Harold Wilkie, MDSan Ramon, CA 945831629161971

Common questions

What is Amanda Stephenson, MD's NPI number?

Amanda Stephenson, MD's National Provider Identifier (NPI) is 1609172451, issued on Jan 26, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Amanda Stephenson, MD located?

The NPPES record lists a practice address at 6001 Norris Canyon RD, San Ramon, CA, 94583. Phone: (925) 275-8280. Providers update this record themselves, so call before visiting.

How can I verify Amanda Stephenson, MD's license?

NPPES lists California license number A135576, 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 Amanda Stephenson, MD prescribe under Medicare Part D?

In 2024, Amanda Stephenson, MD had 165 Medicare Part D claims for 109 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.