Kathy Lien, RN, PNP
NPI 1639840390 · Nurse Practitioner · San Carlos, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathy Lien, RN, PNP is a Nurse Practitioner provider in San Carlos, CA (NPI 1639840390).
Provider details
- NPI number
- 1639840390
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- RN, PNP
- Sex
- Female
- Sole proprietor
- Yes
- License
- 95022454 (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 tenure33% of score
4 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$123 across 6 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)
- 5504 Monterey HwySan Jose, CA 95138-1529Phone: (510) 770-8133
Registry dates
- Enumerated
- 2021-09-22
- Last updated
- 2024-11-21
- Certified
- 2024-11-21
Frequently asked questions
- What is Kathy Lien's NPI number?
- Kathy Lien's National Provider Identifier (NPI) is 1639840390, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathy Lien's specialty?
- Kathy Lien is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kathy Lien located?
- Kathy Lien's practice location on file with NPPES is 301 Industrial Rd, San Carlos, CA 94070-2603.
- What is Kathy Lien's phone number?
- The practice phone number listed in the NPPES registry for Kathy Lien is (650) 596-4000.
- Does Kathy Lien accept Medicare?
- Kathy Lien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathy Lien's NPI active?
- Yes — Kathy Lien's NPI (1639840390) is active in the NPPES registry as of the last update on 2024-11-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.