Leonard I. Mastbaum, MD
Endocrinology, Diabetes & Metabolism Physician · Fort Wayne, IN
Leonard I. Mastbaum, MD is an endocrinology, diabetes & metabolism physician with a practice address in Fort Wayne, Indiana, and NPI 1619928249, issued on May 16, 2006. Check the license (Indiana 01041346, as entered in NPPES) on the Medical Licensing Board of Indiana; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Leonard I. Mastbaum
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 01041346 IN
Self-reported in NPPES; status is on the state search - Practice location
- 11123 Parkview Plaza Dr, Fort Wayne, IN 46845
- Phone
- (260) 373-4280
- Enumerated
- May 16, 2006
- Record last updated
- Mar 23, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (260) 373-4288
- Medicaid ID
- 100360850 IN
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 180 in Indiana → Look up another NPI →
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Verify Leonard I. Mastbaum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01041346Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Leonard I. Mastbaum among 180 endocrinology, diabetes & metabolism physician records in Indiana
Leonard I. Mastbaum, MD is one of 180 endocrinology, diabetes & metabolism physician records with a practice address in Indiana. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 58% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 65% of these records are
- Record last updated2013 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Indiana
There are 180 endocrinology, diabetes & metabolism physician records in Indiana. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 180 in Indiana → Every provider in Fort Wayne → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Folake Akanbi, MDFort Wayne, IN 468451417442575
- Jeffrey Boord, MD, MPHFort Wayne, IN 468451932296068
- Jeremy Grogg, M.D.Fort Wayne, IN 468451053579599
- Sowjanya Naha, M.D.Fort Wayne, IN 468451821471293
- Hamza Quadri, MDFort Wayne, IN 468451760942023
- Sana Qureshi, D.O.Fort Wayne, IN 468451639444375
- Emily Schroeder, M.D., PH.D.Fort Wayne, IN 468451306021118
- H Beyer, MDFort Wayne, IN 468041518915800
Common questions
What is Leonard I. Mastbaum, MD's NPI number?
Leonard I. Mastbaum, MD's National Provider Identifier (NPI) is 1619928249, issued on May 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leonard I. Mastbaum, MD located?
The NPPES record lists a practice address at 11123 Parkview Plaza Dr, Fort Wayne, IN, 46845. Phone: (260) 373-4280. Providers update this record themselves, so call before visiting.
How can I verify Leonard I. Mastbaum, MD's license?
NPPES lists Indiana license number 01041346, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.