Dr. Ioannis Mastoris MD
About this NPIWhat this record shows.
NPI 1124403209 is registered to Dr. Ioannis Mastoris MD, a Advanced Heart Failure & Transplant Cardiology practising at 55 Fruit St, Grb 800 in Boston, Massachusetts. Advanced Heart Failure & Transplant Cardiology is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Dr. Ioannis Mastoris MD has been enumerated in the National Provider Identifier (NPI) registry since 2015.
Your brand here.
Medicare enrollment
This provider holds 2 Medicare enrollments on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
Practitioner
- I20220901002869Advanced Heart Failure and Transplant CardiologyMA
- I20230314000991Advanced Heart Failure and Transplant CardiologyNH
Source: CMS PECOS public enrollment file.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Dr. Ioannis Mastoris MD accepts. To confirm in-network status with your specific health plan, contact Dr. Ioannis Mastoris MD directly at (617) 643-7972.
Frequently asked
Yes. NPI 1124403209 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Advanced Heart Failure & Transplant Cardiology is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (617) 643-7972.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Dr. Ioannis Mastoris MD is a Type-1 individual NPI.