Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Frederick George Barker, MD

Neurological Surgery Physician in Boston, MA · enumerated 2006 · practices at Mgh Outpatient Pharmacy.

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

National Provider Identifier

1649244344

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Registry record

Entity type Individual (Type 1)

Name Dr. Frederick George Barker

Credential MD

Sex Male

Practice address 55 Fruit Street, Yaw 9e, Boston, MA, 02114

Phone (617) 724-8772

Fax (617) 724-8769

Enumeration date Feb 17, 2006

Last updated in NPPES Nov 29, 2012

Taxonomy & licenses

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License 75156 (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
3085601	Medicaid	MA	-
724881	Other	MA	TUFTS HEALTH PLAN
J11857	Other	MA	BCBS MA

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 Frederick Barker?

Frederick Barker is registered in NPPES with the primary taxonomy of Neurological 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 2012-11-29.