Nolli Silva Riordan, M.D.
Surgery Physician · Alameda, CA
Nolli Silva Riordan, M.D. is a surgery physician with a practice address in Alameda, California, and NPI 1124110192, issued on Sep 28, 2006. Check the license (California G81855, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nolli Silva Riordan
- Credential
- M.D.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- G81855 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1002 Central Ave, Alameda, CA 94501
- Phone
- (510) 521-6078
- Enumerated
- Sep 28, 2006
- Record last updated
- Jun 5, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (510) 521-6079
- Medicare enrollment
- Enrolled (PECOS I20080618000313); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 1993
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Verify Nolli Silva Riordan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G81855Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average surgery physician in 2024
21 Medicare Part D claims, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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): 90.3 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).
Bills Medicare through one group practice
- East Bay Cardiovascular And Thoracic Associates IncDanville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nolli Silva Riordan among 3,118 surgery physician records in California
Nolli Silva Riordan, M.D. is one of 3,118 surgery physician records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1993 · median 2003 among the 1,901 with a school on file
- Record last updated2020 · 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 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Alameda → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Roberto Celada, M.D.Alameda, CA 945011336302959
- Pamela McBride, MDAlameda, CA 945011972558575
- Mary Burchell, MDAlamo, CA 945071912071143
- Bruce LockeAlamo, CA 945071992243802
- Donald Palmer, MDAlamo, CA 945071952489023
- Joseph Brandel, M.D.Antioch, CA 945091770756884
- Michael Ditmars, MDAntioch, CA 945091265440101
- Phillip Polido, M.DAntioch, CA 945091245320001
Common questions
What is Nolli Silva Riordan, M.D.'s NPI number?
Nolli Silva Riordan, M.D.'s National Provider Identifier (NPI) is 1124110192, issued on Sep 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nolli Silva Riordan, M.D. located?
The NPPES record lists a practice address at 1002 Central Ave, Alameda, CA, 94501. Phone: (510) 521-6078. Providers update this record themselves, so call before visiting.
How can I verify Nolli Silva Riordan, M.D.'s license?
NPPES lists California license number G81855, 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 Nolli Silva Riordan, M.D. prescribe under Medicare Part D?
In 2024, Nolli Silva Riordan, M.D. had 21 Medicare Part D claims; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
What is Nolli Silva Riordan, M.D.'s MIPS final score?
The 2023 MIPS final score is 90.3 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.