DR. ROSANA JENNIFER AYOUB MD
NPI 1255658746
Internal Medicine - Endocrinology, Diabetes & Metabolism in Sylmar, CA
About Dr. Rosana Jennifer Ayoub Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ROSANA JENNIFER AYOUB MD (NPI 1255658746) is an individual endocrinology, diabetes & metabolism provider in Sylmar, California, licensed in California (A119909) and active in the NPI registry since April 2010. She is enrolled in Medicare PECOS, maintains a secondary practice location in Torrance, and is a graduate of Loma Linda University School Of Medicine (2010).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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
Dr. Rosana Jennifer Ayoub Md 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 Reassignments
2Medicare enrollment records show Rosana Ayoub reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
West Hills, CA 91304
- Reassigned Medicare billing, California enrollment
- 205 clinicians in this Medicare group
Lomita, CA 90717
- Reassigned Medicare billing, California enrollment
- 2 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 2
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 91342 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
SYLMAR, CA 91342
SYLMAR, CA 91342
SYLMAR, CA 91342
SYLMAR, CA 91342
SYLMAR, CA 91342
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 Rosana Ayoub's NPI number?
The NPI number for Rosana Ayoub is 1255658746. It was assigned to this individual provider in the NPPES registry on April 23, 2010.
Where is Rosana Ayoub located?
Rosana Ayoub practices at 14445 Olive View Dr, Sylmar, CA 91342. The listed phone number is (818) 364-3205.
What is Rosana Ayoub's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Rosana Ayoub enrolled in Medicare?
Yes. Rosana Ayoub 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 organizations bill Medicare for Rosana Ayoub's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Rosana Ayoub reassigns Medicare benefits to 2 organizations: Lakeside Medical Organization, A Medical Group Inc. (West Hills, CA) and Endocrine Care Specialists, Inc (Lomita, CA). Each 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 Rosana Ayoub'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 Rosana Ayoub was last updated on February 23, 2022. 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.
# Dr. Rosana Jennifer Ayoub, MD · NPI 1255658746
Endocrinology, Diabetes & Metabolism physician in Sylmar, California. Individual provider, active in the CMS NPPES registry since April 23, 2010.
## Identity
- **NPI:** 1255658746 (Entity type: Individual)
- **Enumerated:** April 23, 2010
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** A119909 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 14445 OLIVE VIEW DR, Sylmar, CA 91342-1437
- **Phone:** (818) 364-3205
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Lakeside Medical Organization, A Medical Group Inc. (NPI 1831426642, West Hills, CA); Endocrine Care Specialists, Inc (NPI 1821469461, Lomita, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loma Linda University School Of Medicine, class of 2010
## Record status
- **NPPES last updated:** February 23, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1255658746) · Data from the CMS NPPES public registry.