Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Brian S Chasin, MD

Individual provider Infectious Disease Physician · NPI 1952329328

Brian S Chasin, MD is registered under Infectious Disease in Phoenix, Arizona. Qualified in 2001, 25 years ago. Practices with Tucson Physician Group Holdings LLC, a 199-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Arizona and New York.

Years since qualifying
25
Licensed in
AZ, NY
In the registry since
2006
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

3411 N 5th Ave Ste 209
Phoenix, AZ 85013-3812
Phone: (602) 789-0344
Fax: (602) 789-8389
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 60 Prospect Ave, Middletown, NY 10940-4133 — (845) 342-7615

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence 35402 (AZ)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 244048 (NY)

Record details

NPI number1952329328
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 17, 2006
Last updated in NPPESMarch 17, 2018

Medicare enrollment

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

Medicare specialtyINFECTIOUS DISEASE
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Group practice Tucson Physician Group Holdings Llc — 199 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients183
Services billed 188 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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 Tucson Physician Group Holdings LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 199 clinicians in the practice; 12 are shown here.

Other providers in Phoenix