John Koenig, MD

NPI 1245962620 · on the registry since 2022

Practice

Address: 736 Cambridge St
Boston, MA 02135
Phone: (617) 789-3000
Organisation at this address: James A Strom Md Pc
Alan B. Ashare, Md Pc
Caritas Medical Group Inc.
Caritas Medical Group Inc.
Caritas St. Elizabeth Medical Center
Inferred from a shared address, not stated in the registry.
Clinicians at this address: 205

Additional practice sites

55 Fogg Rd, Weymouth, MA

Registry record

Primary taxonomy: 207R00000X
207R00000X
Licence states on file: MA
From the registry's licence fields, which are often incomplete.
Sex: Male
Record last updated: 2025-08-04

Source: CMS National Plan and Provider Enumeration System. Registration is not the same as practising, and the registry records no retirement — some people listed here no longer practise. More in Massachusetts