Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Charles G Knudsen
Behavior Analyst in Waltham, MA · enumerated 2010.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1710280771
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Registry record
Entity type Individual (Type 1)
Name Charles G Knudsen
Sex Male
Practice address 460 Totten Pond Rd, Waltham, MA, 02451
Phone (781) 895-3200
Enumeration date Dec 14, 2010
Last updated in NPPES Dec 14, 2010
Taxonomy & licenses
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.
Frequently asked questions
Where does Charles Knudsen practice?
The practice location on file with NPPES is in Waltham, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Charles Knudsen?
The National Provider Identifier (NPI) for Charles Knudsen is 1710280771, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-12-14.