Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Nicholas P Grigorieff

Orthotic Fitter in Concord, MA · enumerated 2007.

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

National Provider Identifier

1558408740

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Registry record

Entity type Individual (Type 1)

Name Nicholas P Grigorieff

Sex Male

Practice address Concord, MA, 01742

Phone (978) 371-1684

Fax (978) 371-7504

Enumeration date Jan 30, 2007

Last updated in NPPES Oct 25, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1744P3200X Prosthetics Case Management Other Service Providers · License NOT APPLICABLE Secondary

225000000X Orthotic Fitter Respiratory, Developmental, Rehabilitative and Restorative Service Providers Primary

Other identifiers

Identifier	Type	State	Issuer
30003020	Medicaid	NH	-
96949701	Other	MA	NETWORK HEALTH
1531484	Medicaid	MA	-
700626	Other	MA	HARVARD PILGRIM

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 Nicholas Grigorieff?

Nicholas Grigorieff is registered in NPPES with the primary taxonomy of Orthotic Fitter. 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 2007-10-25.