DR. PATRICK AVANESSIAN M.D.
NPI 1235480443
Family Medicine in Fontana, CA
About Dr. Patrick Avanessian M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. PATRICK AVANESSIAN M.D. (NPI 1235480443) is an individual family medicine provider in Fontana, California, licensed in Washington (MD.MD.70162661) and active in the NPI registry since September 2012. He is enrolled in Medicare PECOS, maintains a secondary practice location in Seattle, and is a graduate of Other (2011).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Patrick Avanessian M.d. 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.
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 Patrick Avanessian's NPI number?
The NPI number for Patrick Avanessian is 1235480443. It was assigned to this individual provider in the NPPES registry on September 27, 2012.
Where is Patrick Avanessian located?
Patrick Avanessian practices at 9961 Sierra Ave, Fontana, CA 92335. The listed phone number is (909) 427-5084.
What is Patrick Avanessian's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Patrick Avanessian enrolled in Medicare?
Yes. Patrick Avanessian 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.
When was this NPI record last updated?
The NPPES record for Patrick Avanessian was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 days 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. Patrick Avanessian, M.D. · NPI 1235480443
Family Medicine physician in Fontana, California. Individual provider, active in the CMS NPPES registry since September 27, 2012.
## Identity
- **NPI:** 1235480443 (Entity type: Individual)
- **Enumerated:** September 27, 2012
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** MD.MD.70162661 (Washington)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 9961 SIERRA AVE, Fontana, CA 92335-6720
- **Phone:** (909) 427-5084
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Other, class of 2011
## Record status
- **NPPES last updated:** September 29, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1235480443) · Data from the CMS NPPES public registry.