RANDY HORWITZ MD, PHD
NPI 1194790493
Internal Medicine - Allergy & Immunology in Tucson, AZ
About Randy Horwitz Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RANDY HORWITZ MD, PHD (NPI 1194790493) is an individual allergy & immunology provider in Tucson, Arizona, licensed in Arizona (29958) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Illinois College Of Med (chi/peor/rock/chm-urb) (1990).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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
Randy Horwitz Md, Phd 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 Randy Horwitz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Tucson, AZ 85711
- Reassigned Medicare billing, Arizona enrollment
- 1,514 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
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 85724 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
TUCSON, AZ 85724
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 Randy Horwitz's NPI number?
The NPI number for Randy Horwitz is 1194790493. It was assigned to this individual provider in the NPPES registry on February 21, 2006.
Where is Randy Horwitz located?
Randy Horwitz practices at 1501 N Campbell Ave, Tucson, AZ 85724. The listed phone number is (520) 874-3500.
What is Randy Horwitz's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Allergy & Immunology, with taxonomy code 207RA0201X.
Is Randy Horwitz enrolled in Medicare?
Yes. Randy Horwitz 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 Randy Horwitz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Randy Horwitz reassigns Medicare benefits to Banner-University Medical Group (Tucson, AZ). 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 Randy Horwitz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Randy Horwitz accept?
Health plans from Blue Cross Blue Shield of Arizona and Oscar Health Plan, Inc. list Randy Horwitz 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.
When was this NPI record last updated?
The NPPES record for Randy Horwitz was last updated on June 21, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Randy Horwitz, MD, PHD · NPI 1194790493
Allergy & Immunology physician in Tucson, Arizona. Individual provider, active in the CMS NPPES registry since February 21, 2006.
## Identity
- **NPI:** 1194790493 (Entity type: Individual)
- **Enumerated:** February 21, 2006
- **Primary specialty:** Internal Medicine - Allergy & Immunology · taxonomy 207RA0201X
- **State license:** 29958 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 1501 N CAMPBELL AVE, Tucson, AZ 85724-0001
- **Phone:** (520) 874-3500
## 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:** Banner-University Medical Group (NPI 1932708328, Tucson, AZ), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Illinois College Of Med, class of 1990
## Record status
- **NPPES last updated:** June 21, 2013
- **Other identifiers:** Medicare UPIN I00122 (AZ)
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Source: [NPI Profile](https://npiprofile.com/npi/1194790493) · Data from the CMS NPPES public registry.