Gregory Michael Giancana
Internal Medicine Physician · Phoenix, AZ
Gregory Michael Giancana is an internal medicine physician with a practice address in Phoenix, Arizona, and NPI 1093456071, issued on Apr 5, 2022. Check the license (Arizona 76077, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory Michael Giancana
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 76077 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1300 N 12TH St Ste 508, Phoenix, AZ 85006
- Phone
- (602) 839-3927
- Enumerated
- Apr 5, 2022
- Record last updated
- Sep 11, 2025
- Fax
- (602) 839-4233
- Medicare enrollment
- Enrolled (PECOS I20250624003612); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 1300 N 12TH St Ste 508
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gregory Michael Giancana in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 76077Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
186 Medicare Part D claims for 48 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate25 claims
- Atorvastatin Calcium16 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 2 group practices
- Banner - University Hospital Based Physicians LLCPhoenix, AZ
- Banner - University Primary Care Physicians LLCPhoenix, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Michael Giancana among 2,853 internal medicine physician records in Arizona
Gregory Michael Giancana is one of 2,853 internal medicine physician records with a practice address in Arizona. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 87% of them.
- NPI issued2022 · 87% of these records are older, 9% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2022 · median 2003 among the 1,643 with a school on file
- Record last updated2025 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
695 internal medicine physician records list a practice address in Phoenix
They are 695 of the 31,399 NPPES records with a practice address in Phoenix, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Phoenix → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ricardo Celaya, M.D.Phoenix, AZ 850061861476095
- Lynn Crocker, D.O.Phoenix, AZ 850061558357947
- Charles David, D.O.Phoenix, AZ 850061669447652
- Lorna Honan, MDPhoenix, AZ 850061154395531
- Holger Kranich, M.D.Phoenix, AZ 850061780660266
- Marc Lee, MDPhoenix, AZ 850061962498709
- Stephen Leshin, M.D.Phoenix, AZ 850061396742771
- Anita Murcko, M.D.Phoenix, AZ 850061477558757
Common questions
What is Gregory Michael Giancana's NPI number?
Gregory Michael Giancana's National Provider Identifier (NPI) is 1093456071, issued on Apr 5, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Michael Giancana located?
The NPPES record lists a practice address at 1300 N 12TH St Ste 508, Phoenix, AZ, 85006. Phone: (602) 839-3927. Providers update this record themselves, so call before visiting.
How can I verify Gregory Michael Giancana's license?
NPPES lists Arizona license number 76077, 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 Gregory Michael Giancana prescribe under Medicare Part D?
In 2024, Gregory Michael Giancana had 186 Medicare Part D claims for 48 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.