Randy Horwitz, MD, PHD
NPI 1194790493 · Allergy & Immunology (Internal Medicine) Physician · Tucson, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Randy Horwitz, MD, PHD is a Allergy & Immunology (Internal Medicine) Physician provider in Tucson, AZ (NPI 1194790493).
Provider details
- NPI number
- 1194790493
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 29958 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
11 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 11 | $193 |
Typical Medicare-allowed amounts for these services range $193–$193 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-21
- Last updated
- 2013-06-21
Frequently asked questions
- What is Randy Horwitz's NPI number?
- Randy Horwitz's National Provider Identifier (NPI) is 1194790493, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Randy Horwitz's specialty?
- Randy Horwitz is listed in the NPPES registry with a primary specialty of Allergy & Immunology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Randy Horwitz located?
- Randy Horwitz's practice location on file with NPPES is 1501 N Campbell Ave, Tucson, AZ 85724-0001.
- What is Randy Horwitz's phone number?
- The practice phone number listed in the NPPES registry for Randy Horwitz is (520) 874-3500.
- Does Randy Horwitz accept Medicare?
- Randy Horwitz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Randy Horwitz's NPI active?
- Yes — Randy Horwitz's NPI (1194790493) is active in the NPPES registry as of the last update on 2013-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.