LIANA MICHELLE ATALLAH MD
NPI 1659860229
Internal Medicine in Panorama City, CA
About Liana Michelle Atallah Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LIANA MICHELLE ATALLAH MD (NPI 1659860229) is an individual internal medicine provider in Panorama City, California, licensed in California (A189919) and active in the NPI registry since May 2018. She is enrolled in Medicare PECOS and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses 2
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
Liana Michelle Atallah 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 Liana Atallah reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Panorama City, CA 91402
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
Los Angeles, CA 90033
- Reassigned Medicare billing, California enrollment
- 2,445 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 6
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 91402 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.
PANORAMA CITY, CA 91402
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 Liana Atallah's NPI number?
The NPI number for Liana Atallah is 1659860229. It was assigned to this individual provider in the NPPES registry on May 9, 2018.
Where is Liana Atallah located?
Liana Atallah practices at 13652 Cantara St, Panorama City, CA 91402. The listed phone number is (833) 574-2273.
What is Liana Atallah's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Liana Atallah enrolled in Medicare?
Yes. Liana Atallah 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 Liana Atallah's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Liana Atallah reassigns Medicare benefits to 2 organizations: Southern California Permanente Medical Group (Panorama City, CA) and Usc Care Medical Group, Inc (Los Angeles, 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 Liana Atallah'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 Liana Atallah was last updated on November 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Liana Michelle Atallah, MD · NPI 1659860229
Internal Medicine physician in Panorama City, California. Individual provider, active in the CMS NPPES registry since May 9, 2018.
## Identity
- **NPI:** 1659860229 (Entity type: Individual)
- **Enumerated:** May 9, 2018
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A189919 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 13652 CANTARA ST, Panorama City, CA 91402-5423
- **Phone:** (833) 574-2273
## 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): Southern California Permanente Medical Group (NPI 1407888928, Panorama City, CA); Usc Care Medical Group, Inc (NPI 1902846306, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** November 10, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1659860229) · Data from the CMS NPPES public registry.