MRS. MARILEN LOO NP-BC
NPI 1891165155
Nurse Practitioner - Family in Murrieta, CA
About Mrs. Marilen Loo Np-bc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. MARILEN LOO NP-BC (NPI 1891165155) is an individual family provider in Murrieta, California, licensed in California (NP95002714) and active in the NPI registry since September 2015. She is enrolled in Medicare PECOS and is a graduate of Other (2015).
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 and accepts Medicare assignment
Mrs. Marilen Loo Np-bc is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Marilen Loo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Hemet, CA 92545
- 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92562 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 13
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MURRIETA, CA 92562
MURRIETA, CA 92562
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 Marilen Loo's NPI number?
The NPI number for Marilen Loo is 1891165155. It was assigned to this individual provider in the NPPES registry on September 30, 2015.
Where is Marilen Loo located?
Marilen Loo practices at 41880 Kalmia St Suite #100, Murrieta, CA 92562. The listed phone number is (951) 461-6963.
What is Marilen Loo's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Marilen Loo enrolled in Medicare?
Yes. Marilen Loo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Marilen Loo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marilen Loo reassigns Medicare benefits to Southern California Permanente Medical Group (Hemet, 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 Marilen Loo'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 Marilen Loo was last updated on December 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Mrs. Marilen Loo, NP-BC · NPI 1891165155
Family physician in Murrieta, California. Individual provider, active in the CMS NPPES registry since September 30, 2015.
## Identity
- **NPI:** 1891165155 (Entity type: Individual)
- **Enumerated:** September 30, 2015
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** NP95002714 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 41880 KALMIA ST, SUITE #100, Murrieta, CA 92562-8831
- **Phone:** (951) 461-6963
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **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 1013433465, Hemet, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** December 1, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1891165155) · Data from the CMS NPPES public registry.