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MARISSA ASHLEY JUSTEN
NPI 1861182818
Psychiatry & Neurology - Psychiatry in San Francisco, CA

Active since May 12, 2023PECOS Enrolled
500 PARNASSUS AVE, SAN FRANCISCO, CA 94143(415) 476-4562(415) 502-4166 Get Directions Write a Review

NPPES record last updated: January 28, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Marissa Ashley Justen NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARISSA ASHLEY JUSTEN (NPI 1861182818) is an individual psychiatry provider in San Francisco, California, licensed in California (199201) and active in the NPI registry since May 2023. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1861182818
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameMARISSA ASHLEY JUSTEN
Location Address500 PARNASSUS AVESan Francisco, CA 94143-2203
Mailing Address500 Parnassus AveSan Francisco, CA 94143-2203 · (415) 476-4562 · Fax (415) 502-4166
Phone(415) 476-4562
Fax(415) 502-4166
Sole ProprietorNo
Enumeration DateMay 12, 2023
Last NPPES UpdateJanuary 28, 2025
NPPES CertifiedJanuary 28, 2025
✔ NPI 1861182818 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in CA · 199201
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
500 PARNASSUS AVE, San Francisco, CA 94143
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marissa Ashley Justen is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94143 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PRATAP MUKHERJEE M.D, M.S
Thoracic Surgery (Cardiothoracic Vascular Surgery)
500 PARNASSUS AVE, MUW425
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-7924
ARUSHI GULATI MD
Student in an Organized Health Care Education/Training Program
500 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-4562
SARAH CHONG
Pharmacist
500 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 681-3394
ABBEY LYNN KENNEDY M.D.
Orthopaedic Surgery
500 PARNASSUS AVE, MU 320W
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-6043
RACHEL LEVY MD
Obstetrics & Gynecology
500 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-4562
PROF. MATTHIEU LEGRAND MD, PHD
Anesthesiology (Critical Care Medicine)
500 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-9035
SERGIO EDUARDO FLORES
Orthopaedic Surgery (Sports Medicine)
500 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-1788
CHLOE CONNOLLY DLOTT
Student in an Organized Health Care Education/Training Program
500 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (628) 206-8000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marissa Justen's NPI number?

The NPI number for Marissa Justen is 1861182818. It was assigned to this individual provider in the NPPES registry on May 12, 2023.

Where is Marissa Justen located?

Marissa Justen practices at 500 Parnassus Ave, San Francisco, CA 94143. The listed phone number is (415) 476-4562.

What is Marissa Justen's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Marissa Justen enrolled in Medicare?

Yes. Marissa Justen is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Marissa Justen was last updated on January 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.