Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephen Gregory Werth, M.D.

Dermatology Physician in Quincy, MA · enumerated 2006.

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

National Provider Identifier

1093762734

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Registry record

Entity type Individual (Type 1)

Name Stephen Gregory Werth

Credential M.D.

Sex Male

Practice address 300 Congress St, Suite 408, Quincy, MA, 02169

Phone (617) 773-7431

Fax (617) 773-9592

Enumeration date May 28, 2006

Last updated in NPPES Nov 6, 2015

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 73556 (MA) Primary

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 Stephen Werth?

Stephen Werth is registered in NPPES with the primary taxonomy of Dermatology 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-11-06.