Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Lydia Heather Knutson, D.C.

Chiropractor in Cambridge, MA · enumerated 2008.

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

National Provider Identifier

1134396344

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Registry record

Entity type Individual (Type 1)

Name Dr. Lydia Heather Knutson

Credential D.C.

Sex Female

Practice address 777 Concord Ave, Ste 301, Cambridge, MA, 02138

Phone (617) 876-9099

Fax (617) 876-9011

Enumeration date May 15, 2008

Last updated in NPPES Jun 20, 2013

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 2599 (MA) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Other identifiers

Identifier	Type	State	Issuer
0000Q00724	Other	MA	BLUECROSS BLUESHIELD

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 Lydia Knutson?

Lydia Knutson is registered in NPPES with the primary taxonomy of Chiropractor. 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 2013-06-20.