Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Daniel O Southern, MD

Pain Medicine (Physical Medicine & Rehabilitation) Physician in Norwalk, CT · enumerated 2006.

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

National Provider Identifier

1154346302

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Registry record

Entity type Individual (Type 1)

Name Daniel O Southern

Credential MD

Sex Male

Practice address 91 East Ave Ste 1a, Norwalk, CT, 06851

Phone (203) 456-5717

Fax (203) 445-6184

Enumeration date Jul 12, 2006

Last updated in NPPES Dec 15, 2025

Taxonomy & licenses

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License 042845 (CT) Secondary

2081P2900X Pain Medicine (Physical Medicine & Rehabilitation) Physician Allopathic & Osteopathic Physicians · License 042845 (CT) Primary

208VP0000X Pain Medicine Physician Allopathic & Osteopathic Physicians · License 042845 (CT) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Daniel Southern?

Daniel Southern is registered in NPPES with the primary taxonomy of Pain Medicine (Physical Medicine & Rehabilitation) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-15.