Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Stephen M. Spear M.D. and Stuart A. Nerzig, M.D., PC

Internal Medicine Physician in Southbury, CT · enumerated 2007 · authorized official Stephen Spear, Doctor.

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

National Provider Identifier

1497948137

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Stephen M. Spear M.D. and Stuart A. Nerzig, M.D., PC

Practice address 30 Quaker Farms Rd, Southbury, CT, 06488

Phone (203) 262-9300

Fax (203) 264-1523

Enumeration date Aug 27, 2007

Last updated in NPPES Sep 5, 2007

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Stephen Spear

Title Doctor

Phone (203) 262-9300

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.

Read the full guide → Validate an NPI →

Frequently asked questions

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2007-09-05. Verify at npiregistry.cms.hhs.gov.

Where is Stephen M. Spear M.D. and Stuart A. Nerzig, M.D., PC located?

The practice location on file with NPPES is in Southbury, CT.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-09-05.