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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

CECIL D HAHN M.D.
NPI 1790723070
Psychiatry & Neurology - Neurology in Boston, MA

Active since June 02, 2006
300 LONGWOOD AVE., CHILDREN'S HOSPITAL, NEUROLOGY, BOSTON, MA 02115(617) 355-8735 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Cecil D Hahn M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CECIL D HAHN M.D. (NPI 1790723070) is an individual neurology provider in Boston, Massachusetts, licensed in Massachusetts (216768) and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1790723070
Entity TypeIndividualMale
Primary Taxonomy2084N0400X
Provider Legal NameCECIL D HAHNCredential: M.D.
Location Address300 LONGWOOD AVE., CHILDREN'S HOSPITAL, NEUROLOGYBoston, MA 02115
Mailing Address300 Longwood Ave., Children's Hospital, NeurologyBoston, MA 02115 · (617) 355-8735
Phone(617) 355-8735
Sole ProprietorNo
Enumeration DateJune 2, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1790723070 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0400X
License✔ Licensed in MA · 216768
Definition
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
300 LONGWOOD AVE., Boston, MA 02115
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Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CHRISTOPHER LAMBERT SKELLY PA-C
Physician Assistant
300 LONGWOOD AVE.
BOSTON, MA 02115
Suffolk County (774) 279-8674
MARIA CHAUNCY BRYANT MD
Pediatrics
300 LONGWOOD AVE., ENDERS 140
BOSTON, MA 02115
Suffolk County (617) 355-6117
AVRAM Z TRAUM M.D.
Pediatrics (Pediatric Nephrology)
300 LONGWOOD AVE., BCH DIVISION OF NEPHROLOGY, HU-319
BOSTON, MA 02115
Suffolk County (617) 355-6129
SYLVIA M. MISSAL MSW, LICSW
Social Worker (Clinical)
300 LONGWOOD AVE., CHILDREN'S HOSPITAL BOSTON
BOSTON, MA 02115
Suffolk County (617) 355-7709

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Cecil Hahn's NPI number?

The NPI number for Cecil Hahn is 1790723070. It was assigned to this individual provider in the NPPES registry on June 2, 2006.

Where is Cecil Hahn located?

Cecil Hahn practices at 300 Longwood Ave. Children's Hospital, Neurology, Boston, MA 02115. The listed phone number is (617) 355-8735.

What is Cecil Hahn's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

When was this NPI record last updated?

The NPPES record for Cecil Hahn was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.