Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Daniel Christopher Mascarenhas

Orthopaedic Surgery Physician in Waltham, MA · enumerated 2018.

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

National Provider Identifier

1689170151

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Registry record

Entity type Individual (Type 1)

Name Daniel Christopher Mascarenhas

Sex Male

Practice address 840 Winter Street, Waltham, MA, 02451

Phone (617) 491-6766

Enumeration date Apr 3, 2018

Last updated in NPPES Sep 26, 2024

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 1019869 (MA) Primary

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

Is NPI 1689170151 active?

Yes, as of the latest NPPES snapshot, NPI 1689170151 is active (record last updated 2024-09-26).

How do I verify Daniel Mascarenhas's NPI record?

Cross-check NPI 1689170151 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Samantha Chan Physician Assistant · Waltham, MA NPI 1801488762 Alexandra Wolfe Physician Assistant · Waltham, MA NPI 1003499955

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-09-26.