Randy Horwitz, MD, PHD
Allergy & Immunology (Internal Medicine) Physician · Tucson, AZ
Randy Horwitz, MD, PHD is an allergy & immunology (internal medicine) physician with a practice address in Tucson, Arizona, and NPI 1194790493, issued on Feb 21, 2006. Check the license (Arizona 29958, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Randy Horwitz
- Credential
- MD, PHD
- Primary taxonomy
- Allergy & Immunology (Internal Medicine) Physician 207RA0201X
- License number
- 29958 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1501 N Campbell Ave, Tucson, AZ 85724
- Phone
- (520) 874-3500
- Enumerated
- Feb 21, 2006
- Record last updated
- Jun 21, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040324000752); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1990
- Entity
- Type 1 · individual
Also registered at 1501 N Campbell Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexa Aaronson, MDPediatrics Physician1427793652
- Mohammed Abbas, MDOrthopaedic Surgery Physician1003437872
- Josephine Acuna, M.DEmergency Medicine Physician1710325287
- Rodney Adam, MDInfectious Disease Physician1548249485
- Matthew Adams, D.O.Infectious Disease Physician1578941720
- Elana Addis, M.DObstetrics & Gynecology Physician1730150582
Verify Randy Horwitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 29958Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 97.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Banner-University Medical GroupTucson, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Allergy & Immunology (Internal Medicine) Physician providers in Arizona
There are 8 allergy & immunology (internal medicine) physician records in Arizona.
Other allergy & immunology (internal medicine) physician records in Arizona
- Catherine Freeman, M.D.Phoenix, AZ1770935538
- Kiranjit Khalsa, MDPhoenix, AZ1720321250
- Ariel Leung, MDChandler, AZ1366061129
- Gilbert Ortega, M.D.Peoria, AZ1003349242
- Jacob Pinnas, M. D.Tucson, AZ1427389303
- Puneet Shroff, M.D.Tucson, AZ1265645782
- Alex Wonnaparhown, MDScottsdale, AZ1154856052
Common questions
What is Randy Horwitz, MD, PHD's NPI number?
Randy Horwitz, MD, PHD's National Provider Identifier (NPI) is 1194790493, issued on Feb 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Randy Horwitz, MD, PHD located?
The NPPES record lists a practice address at 1501 N Campbell Ave, Tucson, AZ, 85724. Phone: (520) 874-3500. Providers update this record themselves, so call before visiting.
How can I verify Randy Horwitz, MD, PHD's license?
NPPES lists Arizona license number 29958, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Randy Horwitz, MD, PHD's MIPS final score?
The 2023 MIPS final score is 97.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.