Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. David Allen Horwitz, MD

Individual provider Internal Medicine Physician · NPI 1942512199

Dr. David Allen Horwitz, MD practises Internal Medicine in Scottsdale, Arizona. Graduated from St Louis College of Physicians and Surgeons in 2010, 16 years ago. Practices with Emergency Staffing Solutions Inc, a 58-clinician group and accepts Medicare assignment. Licensed in Arkansas and Arizona.

Years since qualifying
16
Trained at
St Louis College of Physicians and Surgeons
Licensed in
AR, AZ
In the registry since
2010
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

14633 N 58th St
Scottsdale, AZ 85254-2470
Phone: (650) 785-2545
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 46694 (AZ)
Internal Medicine Physician Taxonomy 207R00000X · Licence E-15511 (AR)

Record details

NPI number1942512199
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 3, 2010
Last updated in NPPESJune 23, 2022
Certification dateJune 23, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolST. LOUIS COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 2010 (16 years in practice)
Group practice Emergency Staffing Solutions Inc — 58 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients91
Services billed 121 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Emergency Staffing Solutions Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 58 clinicians in the practice; 12 are shown here.

Other providers in Scottsdale