Nancy Hsieh, PA-C
NPI 1750665444 · Medical Physician Assistant · Menlo Park, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Hsieh, PA-C is a Medical Physician Assistant provider in Menlo Park, CA (NPI 1750665444).
Provider details
- NPI number
- 1750665444
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- Yes
- License
- PA22452 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,799 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 497 | $93 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 267 | $59 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 205 | $112 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 188 | $8 |
| Biopsy of Related Skin Growth, First Growth11102 | 154 | $107 |
| Destruction of Precancer Skin Growth, 1 Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 124 | 102 |
| Gentamicin Sulfate | 103 | 91 |
| Doxycycline Hyclate | 22 | 16 |
| Triamcinolone Acetonide | 21 | 18 |
| Azithromycin | 17 | 12 |
| Acetaminophen With Codeinebrand: Acetaminophen-Codeine | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-09-29
- Last updated
- 2013-04-11
Frequently asked questions
- What is Nancy Hsieh's NPI number?
- Nancy Hsieh's National Provider Identifier (NPI) is 1750665444, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Hsieh's specialty?
- Nancy Hsieh is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Nancy Hsieh located?
- Nancy Hsieh's practice location on file with NPPES is 321 Middlefield Rd, Menlo Park, CA 94025-3500.
- What is Nancy Hsieh's phone number?
- The practice phone number listed in the NPPES registry for Nancy Hsieh is (650) 326-7222.
- Does Nancy Hsieh accept Medicare?
- Nancy Hsieh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Hsieh's NPI active?
- Yes — Nancy Hsieh's NPI (1750665444) is active in the NPPES registry as of the last update on 2013-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.