Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Cynthia Sacco, M.D.
Pediatrics Physician in Waltham, MA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164576237
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Registry record
Entity type Individual (Type 1)
Name Cynthia Sacco
Credential M.D.
Sex Female
Practice address 245 Winter St, Waltham, MA, 02451
Phone (781) 419-2709
Enumeration date Jan 23, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
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 Cynthia Sacco 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 Cynthia Sacco?
The National Provider Identifier (NPI) for Cynthia Sacco is 1164576237, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.