Marissa Justen
NPI 1861182818 · Psychiatry Physician · San Francisco, CA
Enrolled with Medicare as Order and Referring Only - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Justen is a Psychiatry Physician provider in San Francisco, CA (NPI 1861182818).
Provider details
- NPI number
- 1861182818
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- 199201 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1 documented practice location
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
Registry dates
- Enumerated
- 2023-05-12
- Last updated
- 2025-01-28
- Certified
- 2025-01-28
Frequently asked questions
- What is Marissa Justen's NPI number?
- Marissa Justen's National Provider Identifier (NPI) is 1861182818, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Justen's specialty?
- Marissa Justen is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Marissa Justen located?
- Marissa Justen's practice location on file with NPPES is 500 Parnassus Ave, San Francisco, CA 94143-2203.
- What is Marissa Justen's phone number?
- The practice phone number listed in the NPPES registry for Marissa Justen is (415) 476-4562.
- Does Marissa Justen accept Medicare?
- Marissa Justen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Justen's NPI active?
- Yes — Marissa Justen's NPI (1861182818) is active in the NPPES registry as of the last update on 2025-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.