Peir Gen Chiu, GNP
NPI 1326112350 · General Practice Registered Nurse · San Francisco, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peir Gen Chiu, GNP is a General Practice Registered Nurse provider in San Francisco, CA (NPI 1326112350).
Provider details
- NPI number
- 1326112350
- Entity type
- Individual
- Primary specialty
- General Practice Registered NurseNursing Service Providers
- Credential
- GNP
- Sex
- Female
- Sole proprietor
- No
- License
- I2088 (CA)
Specialties & taxonomies
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
1,756 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 266 | $6 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 186 | $13 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 176 | $16 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test85027 | 176 | $6 |
| Vitamin D-3 Level82306 | 163 | $29 |
| Hemoglobin A1c Level83036 | 131 | $10 |
| Manual Urinalysis Test With Examination Using Microscope, Automated |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 76 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,016 | 273 |
| Losartan Potassium | 645 | 164 |
| Amlodipine Besylate | 611 | 159 |
| Metformin Hcl | 391 | 106 |
| Alendronate Sodium | 349 | 95 |
| Metoprolol Succinate | 217 | 61 |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-20
- Last updated
- 2023-03-07
Frequently asked questions
- What is Peir Gen Chiu's NPI number?
- Peir Gen Chiu's National Provider Identifier (NPI) is 1326112350, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peir Gen Chiu's specialty?
- Peir Gen Chiu is listed in the NPPES registry with a primary specialty of General Practice Registered Nurse (Nursing Service Providers).
- Where is Peir Gen Chiu located?
- Peir Gen Chiu's practice location on file with NPPES is 1520 Stockton St, San Francisco, CA 94133.
- What is Peir Gen Chiu's phone number?
- The practice phone number listed in the NPPES registry for Peir Gen Chiu is (415) 391-9686.
- Does Peir Gen Chiu accept Medicare?
- Peir Gen Chiu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peir Gen Chiu's NPI active?
- Yes — Peir Gen Chiu's NPI (1326112350) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.