NPPES file of Aug 9, 2026

Arash Ash Alizadeh, MD, PHD

Medical Oncology Physician · Stanford, CA

Arash Ash Alizadeh, MD, PHD is a medical oncology physician with a practice address in Stanford, California, and NPI 1295824423, issued on Oct 12, 2006. Check the license (California A92354, 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 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1295824423
Name
Arash Ash Alizadeh
Credential
MD, PHD
Primary taxonomy
Medical Oncology Physician 207RX0202X
License number
A92354 CA
Self-reported in NPPES; status is on the state search
Practice location
300 Pasteur Dr, Stanford, CA 94305
Phone
(650) 723-4000
Enumerated
Oct 12, 2006
Record last updated
Apr 12, 2024
Medicare enrollment
Enrolled (PECOS I20090916000834); accepts Medicare assignment
Medical or professional school
Stanford University School Of Medicine, 2003
Telehealth
Offers telehealth (CMS)
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 300 Pasteur Dr

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

  1. Cooper Aakhus, MDEmergency Medicine Physician1194351007
  2. Oliver Aalami, M.D.Vascular Surgery Physician1225229024
  3. Alistair Aaronson, MDInternal Medicine Physician1457628760
  4. Sumaira Aasi, MDMOHS-Micrographic Surgery Physician1780675181
  5. Fahim Abbasi, M.D.Internal Medicine Physician1841484037
  6. Mohamad Abbass, MDNeurological Surgery Physician1679492151

Verify Arash Ash Alizadeh in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A92354
    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

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96% fewer Medicare Part D claims than the average medical oncology physician in 2024

29 Medicare Part D claims, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.

  1. Arash Alizadeh29
  2. Specialty average703

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.

The practice group's MIPS final score for 2023 (Medicare payment program): 76.5 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualityout of 100 · 30% of the final score74.3
  2. Costout of 100 · 30%44.0
  3. Promoting interoperabilityout of 100 · 25%100.0
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

One hospital affiliation

  1. Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

82 medical oncology physician records list a practice address in Stanford

They are 82 of the 5,606 NPPES records with a practice address in Stanford, and 447 medical oncology physician records in California.

Other medical oncology physician records in California

  1. Donald Abrams, MDSan Francisco, CA1679530018
  2. Ranjana Advani, MDStanford, CA1639225121
  3. Kambiz Afrasiabi, M.D.Anaheim, CA1578572368
  4. Mark Agulnik, MDLos Angeles, CA1164448734
  5. David Agus, M.D.Los Angeles, CA1356328249
  6. Weiyun Ai, MDSan Francisco, CA1649346842
  7. Shafqat Akhtar, MDRed Bluff, CA1700960788
  8. Luai Al Rabadi, M.D.San Francisco, CA1659637452
  9. Michael Alexander, MDSanta Cruz, CA1053321760
  10. Sandra AlgazeLos Angeles, CA1861886707

Common questions

What is Arash Ash Alizadeh, MD, PHD's NPI number?

Arash Ash Alizadeh, MD, PHD's National Provider Identifier (NPI) is 1295824423, issued on Oct 12, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Arash Ash Alizadeh, MD, PHD located?

The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.

How can I verify Arash Ash Alizadeh, MD, PHD's license?

NPPES lists California license number A92354, 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 Arash Ash Alizadeh, MD, PHD prescribe under Medicare Part D?

In 2024, Arash Ash Alizadeh, MD, PHD had 29 Medicare Part D claims; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.

What is Arash Ash Alizadeh, MD, PHD's MIPS final score?

The 2023 MIPS final score is 76.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.

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.