Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Britain Welton Nicholson, MD

Internal Medicine Physician in Boston, MA · enumerated 2005 · practices at Massachusetts General Hospital.

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

National Provider Identifier

1578563680

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Registry record

Entity type Individual (Type 1)

Name Dr. Britain Welton Nicholson

Credential MD

Sex Male

Practice address 15 Parkman Street, Bulfinch Medical Group, Wang 535, Boston, MA, 02114

Phone (617) 724-6610

Fax (617) 724-6649

Enumeration date Jul 29, 2005

Last updated in NPPES Feb 14, 2014

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 46175 (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
046175	Other	MA	TUFTS HEALTH PLAN
6176712	Medicaid	MA	-
J03402	Other	MA	BCBS

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 Britain Nicholson?

Britain Nicholson is registered in NPPES with the primary taxonomy of Internal Medicine 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 2014-02-14.