Herbert Sy, NP
Family Nurse Practitioner · Lancaster, CA
Herbert Sy, NP is a family nurse practitioner with a practice address in Lancaster, California, and NPI 1114512886, issued on Mar 4, 2021. Check the license (California 95016819, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Herbert Sy
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 95016819 CA
Self-reported in NPPES; status is on the state search - Practice location
- 43112 15TH St W, Lancaster, CA 93534
- Phone
- (661) 729-4061
- Enumerated
- Mar 4, 2021
- Record last updated
- Jun 27, 2025
- Medicare enrollment
- Enrolled (PECOS I20210820002570); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 43112 15TH St W
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Herbert Sy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95016819Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average family nurse practitioner in 2024
435 Medicare Part D claims for 243 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. 53 claims were for opioids.
Most prescribed
- Albuterol Sulfate Hfa52 claims
- Ondansetron Odt47 claims
- Cephalexin40 claims
- Prednisone34 claims
- Tramadol Hcl34 claims
- Azithromycin22 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.
Bills Medicare through 2 group practices
- Antelope Valley Emergency Medical Associates IncLancaster, CA
- Southern California Permanente Medical GroupPanorama City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Herbert Sy among 16,966 family nurse practitioner records in California
Herbert Sy, NP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 62% of them.
- NPI issued2021 · 62% of these records are older, 32% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2020 · median 2019 among the 6,793 with a school on file
- Record last updated2025 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
89 family nurse practitioner records list a practice address in Lancaster
They are 89 of the 4,273 NPPES records with a practice address in Lancaster, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Lancaster → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Sandra Callaghan, FNPLancaster, CA 935341780970517
- Jacob Carpenter, FNP-CLancaster, CA 935341295199263
- Sukhvir Dhinsa, FNP-BCLancaster, CA 935341255707493
- Richard Emanuel, FNPLancaster, CA 935341922399609
- Pascualita FloresLancaster, CA 935341386040145
- Meredith Graham, NPLancaster, CA 935341558634337
- Dorothy Griego, FNPCLancaster, CA 935341992977326
- Carlos Guerrero, FNPLancaster, CA 935341699855080
Common questions
What is Herbert Sy, NP's NPI number?
Herbert Sy, NP's National Provider Identifier (NPI) is 1114512886, issued on Mar 4, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Herbert Sy, NP located?
The NPPES record lists a practice address at 43112 15TH St W, Lancaster, CA, 93534. Phone: (661) 729-4061. Providers update this record themselves, so call before visiting.
How can I verify Herbert Sy, NP's license?
NPPES lists California license number 95016819, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Herbert Sy, NP prescribe under Medicare Part D?
In 2024, Herbert Sy, NP had 435 Medicare Part D claims for 243 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.