MARISA LOOK
NPI 1346694593
Emergency Medicine in Fontana, CA
About Marisa Look NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARISA LOOK (NPI 1346694593) is an individual emergency medicine provider in Fontana, California, licensed in California (FL8002735) and active in the NPI registry since April 2016. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Marisa Look is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Marisa Look reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Fontana, CA 92335
- Reassigned Medicare billing, California enrollment
- 5,228 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92335 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
FONTANA, CA 92335
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 Marisa Look's NPI number?
The NPI number for Marisa Look is 1346694593. It was assigned to this individual provider in the NPPES registry on April 13, 2016.
Where is Marisa Look located?
Marisa Look practices at 9961 Sierra Ave, Fontana, CA 92335. The listed phone number is (909) 441-6664.
What is Marisa Look's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Marisa Look enrolled in Medicare?
Yes. Marisa Look is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Marisa Look's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marisa Look reassigns Medicare benefits to Southern California Permanente Medical Group (Fontana, 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 Marisa Look'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 Marisa Look was last updated on March 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Marisa Look · NPI 1346694593
Emergency Medicine physician in Fontana, California. Individual provider, active in the CMS NPPES registry since April 13, 2016.
## Identity
- **NPI:** 1346694593 (Entity type: Individual)
- **Enumerated:** April 13, 2016
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** FL8002735 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 9961 SIERRA AVE, Fontana, CA 92335-6720
- **Phone:** (909) 441-6664
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Southern California Permanente Medical Group (NPI 1689606196, Fontana, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 20, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1346694593) · Data from the CMS NPPES public registry.