Nancy Hsieh, PA-C
Medical Physician Assistant · Menlo Park, CA
Nancy Hsieh, PA-C is a medical physician assistant with a practice address in Menlo Park, California, and NPI 1750665444, issued on Sep 29, 2011. Check the license (California PA22452, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nancy Hsieh
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- PA22452 CA
Self-reported in NPPES; status is on the state search - Practice location
- 321 Middlefield RD, Menlo Park, CA 94025
- Phone
- (650) 326-7222
- Enumerated
- Sep 29, 2011
- Record last updated
- Apr 11, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (650) 326-7332
- Medicare enrollment
- Enrolled (PECOS I20120913000416); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 2011
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 in California → Look up another NPI →
Also registered at 321 Middlefield RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sana Ahmed, LMSW, ACSWSocial Worker1851744890
- Amy Auf Der Springe, PT, DPTPhysical Therapist1609253012
- Amanda Bergersen, OTD, OTR/LPediatric Occupational Therapist1245709492
- Maggie Blake, DPTPediatric Physical Therapist1215585690
- Michelle Briggs, OTR/LOccupational Therapist1821315045
- Diana Farid, M.D.Family Medicine Physician1912123175
Verify Nancy Hsieh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA22452Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% fewer Medicare Part D claims than the average medical physician assistant in 2024
362 Medicare Part D claims for 230 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. 17 claims were for opioids.
Most prescribed
- Cephalexin124 claims
- Gentamicin Sulfate103 claims
- Doxycycline Hyclate22 claims
- Triamcinolone Acetonide21 claims
- Azithromycin17 claims
- Acetaminophen-Codeine12 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 MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Peninsula Dermatologic Surgery IncMenlo Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nancy Hsieh among 3,376 medical physician assistant records in California
Nancy Hsieh, PA-C is one of 3,376 medical physician assistant records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 46% of them.
- NPI issued2011 · 46% of these records are older, 49% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2011 · median 2012 among the 1,347 with a school on file
- Record last updated2013 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in California
There are 3,376 medical physician assistant records in California.
All 3,376 in California → Every provider in Menlo Park → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Haley Issichopoulos, MSM, PA-CPortola Valley, CA 940281699288027
- Elena Beider, PA-CDaly City, CA 940151013016724
- Norma Espinoza, NP/PA-CDaly City, CA 940151336163203
- Kiana Lee, PA-CDaly City, CA 940151558070821
- Marleen Rodriguez OrtizDaly City, CA 940151518736107
- Wynona Caliboso, PA-CMountain View, CA 940401184318958
- Mark Caplin, PA-CMountain View, CA 940401174792865
- Lisa Cheung, PAMountain View, CA 940401659093987
Common questions
What is Nancy Hsieh, PA-C's NPI number?
Nancy Hsieh, PA-C's National Provider Identifier (NPI) is 1750665444, issued on Sep 29, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Nancy Hsieh, PA-C located?
The NPPES record lists a practice address at 321 Middlefield RD, Menlo Park, CA, 94025. Phone: (650) 326-7222. Providers update this record themselves, so call before visiting.
How can I verify Nancy Hsieh, PA-C's license?
NPPES lists California license number PA22452, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Nancy Hsieh, PA-C prescribe under Medicare Part D?
In 2024, Nancy Hsieh, PA-C had 362 Medicare Part D claims for 230 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
What is Nancy Hsieh, PA-C's MIPS final score?
The 2023 MIPS final score is 100 of 100. 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.