Nicholas Tieu, PA-C
NPI 1265203889 · Physician Assistant · Palo Alto, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Tieu, PA-C is a Physician Assistant provider in Palo Alto, CA (NPI 1265203889).
Provider details
- NPI number
- 1265203889
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Male
- Sole proprietor
- No
- License
- PA67875 (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 tenure25% of score
2 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
184 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 99 | $76 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 27 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 27 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 18 | $107 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 13 | $10 |
Typical Medicare-allowed amounts for these services range $8–$107 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,607 across 74 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 3730 S Eastern AveLas Vegas, NV 89169-3321Phone: (702) 952-3400
Registry dates
- Enumerated
- 2024-01-11
- Last updated
- 2026-05-06
- Certified
- 2026-05-06
Frequently asked questions
- What is Nicholas Tieu's NPI number?
- Nicholas Tieu's National Provider Identifier (NPI) is 1265203889, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Tieu's specialty?
- Nicholas Tieu is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Nicholas Tieu located?
- Nicholas Tieu's practice location on file with NPPES is 795 El Camino Real, Palo Alto, CA 94301-2302.
- What is Nicholas Tieu's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Tieu is (650) 853-2974.
- Does Nicholas Tieu accept Medicare?
- Nicholas Tieu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Tieu's NPI active?
- Yes — Nicholas Tieu's NPI (1265203889) is active in the NPPES registry as of the last update on 2026-05-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.