Vivian Lo, PA-C
Physician Assistant · Concord, CA
Vivian Lo, PA-C is a physician assistant with a practice address in Concord, California, and NPI 1003167453, issued on Sep 25, 2012. Check the license (California PA22434, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Vivian Lo
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA22434 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2481 Pacheco St, Concord, CA 94520
- Phone
- (925) 680-8933
- Enumerated
- Sep 25, 2012
- Record last updated
- Sep 25, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 2481 Pacheco St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kristina Carpenter, D.O.Family Medicine Physician1952741985
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Verify Vivian Lo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA22434Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average physician assistant in 2024
1,666 Medicare Part D claims for 103 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Mirtazapine217 claims
- Duloxetine Hcl211 claims
- Gabapentin173 claims
- Divalproex Sodium142 claims
- Risperidone124 claims
- Trazodone Hcl117 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.
Vivian Lo among 14,451 physician assistant records in California
Vivian Lo, PA-C 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 2012, is newer than 33% of them.
- NPI issued2012 · 33% of these records are older, 65% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2012 · 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).
43 physician assistant records list a practice address in Concord
They are 43 of the 9,328 NPPES records with a practice address in Concord, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Concord → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Margarita Bautista, PAConcord, CA 945201861556391
- Janice Beglau-Taylor, MDConcord, CA 945201538214937
- Gabriella Cardi, PAConcord, CA 945201467508465
- Melanie Deal, FNPConcord, CA 945201124154679
- Marla Hall, PAConcord, CA 945201790896967
- Lucinda Hopewell, PAConcord, CA 945201114070273
- Marcus Hudock, PA-CConcord, CA 945201285643213
- Doris Iaroli, PAConcord, CA 945201548310493
Common questions
What is Vivian Lo, PA-C's NPI number?
Vivian Lo, PA-C's National Provider Identifier (NPI) is 1003167453, issued on Sep 25, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Vivian Lo, PA-C located?
The NPPES record lists a practice address at 2481 Pacheco St, Concord, CA, 94520. Phone: (925) 680-8933. Providers update this record themselves, so call before visiting.
How can I verify Vivian Lo, PA-C's license?
NPPES lists California license number PA22434, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Vivian Lo, PA-C prescribe under Medicare Part D?
In 2024, Vivian Lo, PA-C had 1,666 Medicare Part D claims for 103 beneficiaries; the average among physician assistant prescribers was 830. 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.