Larry Mastrogianakis, MD
Pediatrics Physician · Jacksonville, FL
Larry Mastrogianakis, MD is a pediatrics physician with a practice address in Jacksonville, Florida, and NPI 1023090800, issued on Nov 16, 2005. Check the license (Florida 44927, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Larry Mastrogianakis
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License numbers
- 44927 FL
ME44927 FL
65705 GA
Self-reported in NPPES; status is on the state search - Practice location
- 12428 San Jose Blvd, Jacksonville, FL 32223
- Phone
- (904) 260-9495
- Enumerated
- Nov 16, 2005
- Record last updated
- Jul 23, 2025
- Fax
- (904) 260-3009
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 3,996 in Florida → Look up another NPI →
Verify Larry Mastrogianakis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license 44927Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average pediatrics physician in 2024
38 Medicare Part D claims, against an average of 375 among the 5,609 providers of this specialty who prescribed in Part D.
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.
Larry Mastrogianakis among 3,996 pediatrics physician records in Florida
Larry Mastrogianakis, MD is one of 3,996 pediatrics physician records with a practice address in Florida. 51% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 85% newer
- In a Medicare fileYes · 51% of these records are
- In the CMS Doctors and Clinicians fileNo · 7% of these records are
- Record last updated2025 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatrics Physician providers in Florida
There are 3,996 pediatrics physician records in Florida.
All 3,996 in Florida → Every provider in Jacksonville → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Sherwat Abdelrahman, MDJacksonville, FL 322231801249636
- Sonja France, MDJacksonville, FL 322231073590618
- Catherine Hartley, MDJacksonville, FL 322231376520619
- Irene Malesic, MDJacksonville, FL 322231972609345
- Madhura Butala, MDJacksonville, FL 322241962657577
- Ghassan Ghata, MDJacksonville, FL 322241013983063
- Sara Guzman, MDJacksonville, FL 322241194736181
- Carlos Maria, M.D.Jacksonville, FL 322241508936949
Common questions
What is Larry Mastrogianakis, MD's NPI number?
Larry Mastrogianakis, MD's National Provider Identifier (NPI) is 1023090800, issued on Nov 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Larry Mastrogianakis, MD located?
The NPPES record lists a practice address at 12428 San Jose Blvd, Jacksonville, FL, 32223. Phone: (904) 260-9495. Providers update this record themselves, so call before visiting.
How can I verify Larry Mastrogianakis, MD's license?
NPPES lists Florida license number 44927, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Larry Mastrogianakis, MD prescribe under Medicare Part D?
In 2024, Larry Mastrogianakis, MD had 38 Medicare Part D claims; the average among pediatrics physician prescribers was 375. 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.