NASSER T LIASI MD
NPI 1144466780
Internal Medicine in Fontana, CA
About Nasser T Liasi Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NASSER T LIASI MD (NPI 1144466780) is an individual internal medicine provider in Fontana, California, licensed in California (A115058) and active in the NPI registry since January 2009. He is enrolled in Medicare PECOS, maintains a secondary practice location in Redlands, and is a graduate of Other (1987).
NPPES Registry Identity
Specialties & Licenses
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
Nasser T Liasi 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
3Medicare enrollment records show Nasser Liasi reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fontana, CA 92335
- Reassigned Medicare billing, California enrollment
- 149 clinicians in this Medicare group
Colton, CA 92324
- Reassigned Medicare billing, California enrollment
- 338 clinicians in this Medicare group
Lodi, CA 95240
- Reassigned Medicare billing, California enrollment
- 148 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 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 15
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Nasser Liasi's NPI number?
The NPI number for Nasser Liasi is 1144466780. It was assigned to this individual provider in the NPPES registry on January 4, 2009.
Where is Nasser Liasi located?
Nasser Liasi practices at 8110 Mango Ave, Fontana, CA 92335. The listed phone number is (909) 427-1303.
What is Nasser Liasi's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Nasser Liasi enrolled in Medicare?
Yes. Nasser Liasi 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 Nasser Liasi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nasser Liasi reassigns Medicare benefits to 3 organizations: Pinnacle Medical Group, Inc (Fontana, CA), Quantum Healthcare Medical Associates Inc. (Colton, CA) and Clinic Services Of California Medical Group Inc (Lodi, 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 Nasser Liasi'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 Nasser Liasi was last updated on October 4, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Nasser T Liasi, MD · NPI 1144466780
Internal Medicine physician in Fontana, California. Individual provider, active in the CMS NPPES registry since January 4, 2009.
## Identity
- **NPI:** 1144466780 (Entity type: Individual)
- **Enumerated:** January 4, 2009
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A115058 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 8110 MANGO AVE, Fontana, CA 92335-3603
- **Phone:** (909) 427-1303
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Pinnacle Medical Group, Inc (NPI 1376876912, Fontana, CA); Quantum Healthcare Medical Associates Inc. (NPI 1568490597, Colton, CA); Clinic Services Of California Medical Group Inc (NPI 1578958450, Lodi, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1987
## Record status
- **NPPES last updated:** October 4, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1144466780) · Data from the CMS NPPES public registry.