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About this NPIWhat this record shows.
NPI 1609827666 is registered to Karen Marcus MD, a Radiation Oncology Physician practising at 300 Longwood Avenue, Childrens Hospital Dept Of Radiation Oncology in Boston, Massachusetts. Radiation Oncology Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Karen Marcus MD has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Provider type
Individual (Type 1)
Status
Active
Enumerated
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The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Karen Marcus MD accepts. To confirm in-network status with your specific health plan, contact Karen Marcus MD directly at (617) 355-8399.
Frequently asked
Yes. NPI 1609827666 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Radiation Oncology Physician 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) 355-8399.
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. Karen Marcus MD is a Type-1 individual NPI.
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