Nason Azizi, M.D.
Internal Medicine Physician · Walnut Creek, CA
Nason Azizi, M.D. is an internal medicine physician with a practice address in Walnut Creek, California, and NPI 1538594973, issued on Sep 4, 2013. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nason Azizi
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 1220 Rossmoor Parkway, Walnut Creek, CA 94595
- Phone
- (925) 947-3312
- Enumerated
- Sep 4, 2013
- Record last updated
- Oct 28, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (925) 947-3396
- Medicare enrollment
- Enrolled (PECOS I20160418002087); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 1220 Rossmoor Parkway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Zainab Mezban, MDInternal Medicine Physician1275621872
- Runjhun Misra, D.O.Internal Medicine Physician1386965101
- Brian O'Connor, M.D., MPHInternal Medicine Physician1487087615
Verify Nason Azizi 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
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
296 Medicare Part D claims for 125 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 18 claims were for opioids.
Most prescribed
- Eliquis19 claims
- Pantoprazole Sodium18 claims
- Amlodipine Besylate11 claims
- Atorvastatin Calcium11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 85.7 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.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $142.91
2 payments; by number, the most common kind was food and beverage; the largest payer was Actelion Pharmaceuticals US, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- John Muir Physician NetworkConcord, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
183 internal medicine physician records list a practice address in Walnut Creek
They are 183 of the 6,170 NPPES records with a practice address in Walnut Creek, and 17,696 internal medicine physician records in California.
All 183 in Walnut Creek → All 17,696 in California → Every provider in Walnut Creek →
Other internal medicine physician records in California
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- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Nason Azizi, M.D.'s NPI number?
Nason Azizi, M.D.'s National Provider Identifier (NPI) is 1538594973, issued on Sep 4, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Nason Azizi, M.D. located?
The NPPES record lists a practice address at 1220 Rossmoor Parkway, Walnut Creek, CA, 94595. Phone: (925) 947-3312. Providers update this record themselves, so call before visiting.
How can I verify Nason Azizi, 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 Nason Azizi, M.D. prescribe under Medicare Part D?
In 2024, Nason Azizi, M.D. had 296 Medicare Part D claims for 125 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Nason Azizi, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.7 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.