Cassandra Ballantyne, MD
Internal Medicine Physician · Tucson, AZ
Cassandra Ballantyne, MD is an internal medicine physician with a practice address in Tucson, Arizona, and NPI 1851973192, issued on Apr 26, 2021. Check the license (Arizona R78555, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Cassandra Ballantyne
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- R78555 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 4730 E Grant RD, Tucson, AZ 85712
- Phone
- (520) 290-0300
- Enumerated
- Apr 26, 2021
- Record last updated
- Nov 19, 2024
- Fax
- (520) 298-9230
- Medicare enrollment
- Enrolled (PECOS I20240827001603); accepts Medicare assignment
- Medical or professional school
- University Of North Dakota School Of Medicine, 2021
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 4730 E Grant RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danielle Brower, D.O.Internal Medicine Physician1306233564
- Kaitlin Compton, FNPPrimary Care Nurse Practitioner1689458739
- Michael Mayette, APRNNurse Practitioner1255803300
- Elena McCabe, FNPFamily Nurse Practitioner1649791450
- Zoe O'Warren, PAMedical Physician Assistant1699329458
- Rodolfo Penaflor, MDInternal Medicine Physician1821072018
Verify Cassandra Ballantyne in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license R78555Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average internal medicine physician in 2024
993 Medicare Part D claims for 407 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 32 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium61 claims
- Amlodipine Besylate59 claims
- Atorvastatin Calcium44 claims
- Levothyroxine Sodium41 claims
- Lisinopril39 claims
- Albuterol Sulfate Hfa37 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Greater Phoenix Collaborative Care PCTucson, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
651 internal medicine physician records list a practice address in Tucson
They are 651 of the 18,788 NPPES records with a practice address in Tucson, and 2,853 internal medicine physician records in Arizona.
All 651 in Tucson → All 2,853 in Arizona → Every provider in Tucson →
Other internal medicine physician records in Arizona
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- Constantia Abarikwu, MDPhoenix, AZ1497832620
- Jaber Abawi, MDPayson, AZ1629038542
- Demsas Abay, MDPeoria, AZ1720312390
- Firas Abbas, M.D. M.P.H.Mesa, AZ1336481407
- Hassan Abbas, D.O.Mesa, AZ1477294775
- Jalal Abbas, M.D.Sun City West, AZ1205895034
- Tayeb Abbas, MDSun City West, AZ1093406795
- Hamed Abbaszadegan, MDPhoenix, AZ1407083579
- Kristopher Abbate, MDTucson, AZ1184112401
Common questions
What is Cassandra Ballantyne, MD's NPI number?
Cassandra Ballantyne, MD's National Provider Identifier (NPI) is 1851973192, issued on Apr 26, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Cassandra Ballantyne, MD located?
The NPPES record lists a practice address at 4730 E Grant RD, Tucson, AZ, 85712. Phone: (520) 290-0300. Providers update this record themselves, so call before visiting.
How can I verify Cassandra Ballantyne, MD's license?
NPPES lists Arizona license number R78555, 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.
How much does Cassandra Ballantyne, MD prescribe under Medicare Part D?
In 2024, Cassandra Ballantyne, MD had 993 Medicare Part D claims for 407 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.