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MARISSA FOX MD
NPI 1356970883
Internal Medicine in Los Angeles, CA

Active since April 06, 2020PECOS Enrolled
5901 W OLYMPIC BLVD STE 310, LOS ANGELES, CA 90036(323) 215-1725 Get Directions Write a Review

NPPES record last updated: February 25, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Marissa Fox Md NPPES

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

MARISSA FOX MD (NPI 1356970883) is an individual internal medicine provider in Los Angeles, California, licensed in California (A178987) and active in the NPI registry since April 2020. She is enrolled in Medicare PECOS and is a graduate of Other (2020).

NPPES Registry Identity

NPI1356970883
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameMARISSA FOXCredential: MD
Location Address5901 W OLYMPIC BLVD STE 310Los Angeles, CA 90036-4664
Mailing Address5901 W Olympic Blvd Ste 310Los Angeles, CA 90036-4664 · (323) 215-1725
Phone(323) 215-1725
Sole ProprietorYes
Medical School CMSOtherGraduated 2020
Enumeration DateApril 6, 2020
Last NPPES UpdateFebruary 25, 2024
NPPES CertifiedFebruary 25, 2024
✔ NPI 1356970883 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A178987
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
5901 W OLYMPIC BLVD STE 310, Los Angeles, CA 90036
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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

PECOS PAC ID4587029178
PECOS Enrollment IDI20260730001582
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.

Medicare Billing Reassignment

Medicare enrollment records show Marissa Fox reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Apla Health & Wellness
Same address
Federally Qualified Health Center (FQHC)
5901 W OLYMPIC BLVD., SUITE 310
Los Angeles, CA 90036
  • Reassigned Medicare billing, California enrollment
  • 34 clinicians in this Medicare group
NPI 1790202968 (323) 215-1725

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90036 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
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 7

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

MATTHEW DAVID DIEBLER AMFT
Marriage & Family Therapist
5901 W OLYMPIC BLVD STE 310
LOS ANGELES, CA 90036
Los Angeles County (323) 215-1725
DR. JAY E GLADSTEIN M.D.
Internal Medicine (Infectious Disease)
5901 W OLYMPIC BLVD STE 310
LOS ANGELES, CA 90036
Los Angeles County (323) 215-1725
MS. CAROLINE LEE BELIN NP-C
Nurse Practitioner
5901 W OLYMPIC BLVD STE 310
LOS ANGELES, CA 90036
Los Angeles County (323) 215-1725
DR. WAYNE HO M.D.
Internal Medicine
5901 W OLYMPIC BLVD STE 310
LOS ANGELES, CA 90036
Los Angeles County (323) 215-1725
MR. KEVIN WILLIAM RAUCHUT JR. NP-C
Nurse Practitioner (Adult Health)
5901 W OLYMPIC BLVD STE 310
LOS ANGELES, CA 90036
Los Angeles County (323) 215-1725
DR. ARTHUR VERMEULEN MD
Internal Medicine
5901 W OLYMPIC BLVD STE 310
LOS ANGELES, CA 90036
Los Angeles County (323) 215-1725
MICHELLE MINA RASTEGAR M.D.
Preventive Medicine (Addiction Medicine)
5901 W OLYMPIC BLVD STE 310
LOS ANGELES, CA 90036
Los Angeles County (323) 215-1725

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 Fox's NPI number?

The NPI number for Marissa Fox is 1356970883. It was assigned to this individual provider in the NPPES registry on April 6, 2020.

Where is Marissa Fox located?

Marissa Fox practices at 5901 W Olympic Blvd Ste 310, Los Angeles, CA 90036. The listed phone number is (323) 215-1725.

What is Marissa Fox's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Marissa Fox enrolled in Medicare?

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

Which organization bills Medicare for Marissa Fox's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Fox reassigns Medicare benefits to Apla Health & Wellness (Los Angeles, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marissa Fox's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Marissa Fox was last updated on February 25, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.