JOHN W. SULLIVAN MD – NPI #1275506578
Psychiatry & Neurology
Clinical Neurophysiology is a subspecialty with psychiatric or neurologic expertise in the diagnosis and management of central, peripheral, and autonomic nervous system disorders using combined clinical evaluation and electrophysiologic testing such as electroencephalography (EEG), electromyography (EMG), and nerve conduction studies (NCS).
JOHN SULLIVAN is a psychiatry & neurologist located in LONGMEADOW, MA. NPPES has assigned the NPI number 1275506578 to JOHN SULLIVAN on February 08, 2006. It is a Type-1 NPI, indicating this NPI number is associated with an individual. With multiple taxonomy codes selected, the primary taxonomy selected by this provider is 2084N0600X from the Health Care Provider Taxonomy code set, which is classified as Psychiatry & Neurology, specializing in Clinical Neurophysiology
The NPI profile was last updated on Sep 11, 2025. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for JOHN SULLIVAN below.
NPI Profile for
JOHN W. SULLIVAN
(more than 20 years ago)
STE 301
LONGMEADOW, MA 01106 Phone: (413) 737-4746 Fax: (413) 565-2297
A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.
| Taxonomy Classification / Specialization | State | License |
|---|---|---|
| 2084N0600X - Psychiatry & Neurology / Clinical Neurophysiology (Primary) |
MA | 35840 |
| 2084N0400X - Psychiatry & Neurology / Neurology |
MA | 35840 |
The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.