Alexa Tjen
NPI 1598469140 · Psychiatric/Mental Health Nurse Practitioner · Agoura Hills, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexa Tjen is a Psychiatric/Mental Health Nurse Practitioner provider in Agoura Hills, CA (NPI 1598469140).
Provider details
- NPI number
- 1598469140
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 95234508 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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.
Practice location
Mailing address
Additional practice locations (1)
- 18646 Oxnard StTarzana, CA 91356-1411Phone: (818) 996-1051
Registry dates
- Enumerated
- 2023-03-28
- Last updated
- 2025-06-26
- Certified
- 2025-06-26
Frequently asked questions
- What is Alexa Tjen's NPI number?
- Alexa Tjen's National Provider Identifier (NPI) is 1598469140, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexa Tjen's specialty?
- Alexa Tjen is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Alexa Tjen located?
- Alexa Tjen's practice location on file with NPPES is 30495 Canwood St, Agoura Hills, CA 91301-4331.
- What is Alexa Tjen's phone number?
- The practice phone number listed in the NPPES registry for Alexa Tjen is (818) 707-7366.
- Does Alexa Tjen accept Medicare?
- Alexa Tjen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexa Tjen's NPI active?
- Yes — Alexa Tjen's NPI (1598469140) is active in the NPPES registry as of the last update on 2025-06-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.