Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Charles Mason Ferguson, MD

Surgery Physician in Boston, MA · enumerated 2005.

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

National Provider Identifier

1194716746

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Registry record

Entity type Individual (Type 1)

Name Charles Mason Ferguson

Credential MD

Sex Male

Practice address 15 Parkman St, Wac 465, Boston, MA, 02114

Phone (617) 724-6915

Fax (617) 724-6802

Enumeration date Nov 2, 2005

Last updated in NPPES Aug 7, 2013

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 47435 (MA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
3083268	Medicaid	MA	-
E05679	Other	MA	BCBS MA
047435	Other	MA	TUFTS HEALTH PLAN

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.

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Frequently asked questions

What specialty is Charles Ferguson?

Charles Ferguson is registered in NPPES with the primary taxonomy of Surgery 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 2013-08-07.