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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Dennis James Teehan Jr., M.D

Preventive Medicine/Occupational Environmental Medicine Physician in Boston, MA · enumerated 2008.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1306006945

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Registry record

Entity type Individual (Type 1)
Name Dr. Dennis James Teehan Jr.
Credential M.D
Sex Male
Practice address Boston, MA, 02115
Phone (617) 432-3327
Enumeration date Jun 16, 2008
Last updated in NPPES Jun 27, 2014

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

2083P0500X Preventive Medicine/Occupational Environmental Medicine Physician Allopathic & Osteopathic Physicians · License 250272 (MA) Primary
208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 250272 (MA) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where does Dennis Teehan practice?
The practice location on file with NPPES is in Boston, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Dennis Teehan?
The National Provider Identifier (NPI) for Dennis Teehan is 1306006945, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-06-27.