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

Cassandra Ballantyne, MD

Individual provider Internal Medicine Physician · NPI 1851973192

Cassandra Ballantyne, MD practises Internal Medicine in Tucson, Arizona. Graduated from University of North Dakota School of Medicine in 2021, 5 years ago. Practices with Greater Phoenix Collaborative Care PC, a 111-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Arizona.

Years since qualifying
5
Trained at
University of North Dakota School of Medicine
Licensed in
AZ
In the registry since
2021
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

4730 E Grant Rd
Tucson, AZ 85712-2703
Phone: (520) 290-0300
Fax: (520) 298-9230
Show map & directions

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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 R78555 (AZ)

Record details

NPI number1851973192
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 26, 2021
Last updated in NPPESNovember 19, 2024
Certification dateNovember 19, 2024

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF NORTH DAKOTA SCHOOL OF MEDICINE
Graduated 2021 (5 years in practice)
Group practice Greater Phoenix Collaborative Care Pc — 111 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients83
Services billed 269 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Colleagues at Greater Phoenix Collaborative Care PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 111 clinicians in the practice; 12 are shown here.

Other providers in Tucson