Benjamin Samuel Lopez, PA
Physician Assistant · Walnut Creek, CA
Benjamin Samuel Lopez, PA is a physician assistant with a practice address in Walnut Creek, California, and NPI 1881153187, issued on Mar 16, 2019. Check the license (California PA56556, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Benjamin Samuel Lopez
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA56556 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1601 Ygnacio Valley RD, Walnut Creek, CA 94598
- Phone
- (925) 395-5800
- Enumerated
- Mar 16, 2019
- Record last updated
- Mar 7, 2022
- Medicare enrollment
- Enrolled (PECOS I20201125000565); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 1601 Ygnacio Valley RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Benjamin Samuel Lopez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA56556Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average physician assistant in 2024
154 Medicare Part D claims for 102 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 17 claims were for opioids.
Most prescribed
- Ondansetron Odt20 claims
- Cephalexin19 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): 94.6 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 2 group practices
- Cep America - Auc PCWalnut Creek, CA
- Medamerica Physician Solutions PCWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Benjamin Samuel Lopez among 14,451 physician assistant records in California
Benjamin Samuel Lopez, PA is one of 14,451 physician assistant 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 2019, is newer than 56% of them.
- NPI issued2019 · 56% of these records are older, 38% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2018 · median 2018 among the 7,214 with a school on file
- Record last updated2022 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
89 physician assistant records list a practice address in Walnut Creek
They are 89 of the 6,170 NPPES records with a practice address in Walnut Creek, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Walnut Creek → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Carolyn Cardamone, P.A-CWalnut Creek, CA 945981639194616
- Stephanie Chin, PA-CWalnut Creek, CA 945981902936115
- Jennifer Falk, PA-CWalnut Creek, CA 945981093014110
- Megan Hardin, MPA, PA-CWalnut Creek, CA 945981831411453
- Heidi Heal, PA-CWalnut Creek, CA 945981912967498
- Coryn Nicholls, PA-CWalnut Creek, CA 945981487832739
- Elizabeth Oconnor, PACWalnut Creek, CA 945981356598403
- Ingrid Pampalone, PA-CWalnut Creek, CA 945981891937652
Common questions
What is Benjamin Samuel Lopez, PA's NPI number?
Benjamin Samuel Lopez, PA's National Provider Identifier (NPI) is 1881153187, issued on Mar 16, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Benjamin Samuel Lopez, PA located?
The NPPES record lists a practice address at 1601 Ygnacio Valley RD, Walnut Creek, CA, 94598. Phone: (925) 395-5800. Providers update this record themselves, so call before visiting.
How can I verify Benjamin Samuel Lopez, PA's license?
NPPES lists California license number PA56556, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Benjamin Samuel Lopez, PA prescribe under Medicare Part D?
In 2024, Benjamin Samuel Lopez, PA had 154 Medicare Part D claims for 102 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Benjamin Samuel Lopez, PA's MIPS final score?
The 2023 MIPS final score is 94.6 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.