MAZEN ARAR MD
NPI 1962519033
Pediatrics - Pediatric Nephrology in San Antonio, TX
About Mazen Arar Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MAZEN ARAR MD (NPI 1962519033) is an individual pediatric nephrology provider in San Antonio, Texas, licensed in Texas (J2861) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with University Health System, and is a graduate of Other (1980).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Accepted Insurance
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
Mazen Arar 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 Reassignment
Medicare enrollment records show Mazen Arar reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Antonio, TX 78229
- Reassigned Medicare billing, Texas enrollment
- 2,397 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Health System
Acute Care Hospitals · San Antonio, TXFrequently 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 Mazen Arar's NPI number?
The NPI number for Mazen Arar is 1962519033. It was assigned to this individual provider in the NPPES registry on August 24, 2006.
Where is Mazen Arar located?
Mazen Arar practices at 333 N Santa Rosa, 2nd Fl, San Antonio, TX 78207. The listed phone number is (210) 257-1400.
What is Mazen Arar's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Nephrology, with taxonomy code 2080P0210X.
Is Mazen Arar enrolled in Medicare?
Yes. Mazen Arar 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 Mazen Arar's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mazen Arar reassigns Medicare benefits to University Of Texas Health Science Center At San Antonio (San Antonio, TX). 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 Mazen Arar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mazen Arar accept?
Health plans from Blue Cross and Blue Shield of Texas and Imperial Insurance Companies, Inc. list Mazen Arar as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Mazen Arar affiliated with any hospitals?
According to CMS data, Mazen Arar is affiliated with University Health System.
When was this NPI record last updated?
The NPPES record for Mazen Arar was last updated on May 22, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Mazen Arar, MD · NPI 1962519033
Pediatric Nephrology physician in San Antonio, Texas. Individual provider, active in the CMS NPPES registry since August 24, 2006.
## Identity
- **NPI:** 1962519033 (Entity type: Individual)
- **Enumerated:** August 24, 2006
- **Primary specialty:** Pediatrics - Pediatric Nephrology · taxonomy 2080P0210X
- **State license:** J2861 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 333 N SANTA ROSA, 2ND FL, San Antonio, TX 78207
- **Phone:** (210) 257-1400
## 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:** University Of Texas Health Science Center At San Antonio (NPI 1396717989, San Antonio, TX), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1980
## Record status
- **NPPES last updated:** May 22, 2008
- **Other identifiers:** Other 129493604; Medicare PIN 885759; Medicaid 129493605 (TX)
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Source: [NPI Profile](https://npiprofile.com/npi/1962519033) · Data from the CMS NPPES public registry.