Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Tak-Yin Chau, O.D.
Optometrist in Westford, MA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1346392990
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Registry record
Entity type Individual (Type 1)
Name Tak-Yin Chau
Credential O.D.
Sex Male
Practice address 133 Littleton Rd, Suite 204, Westford, MA, 01886
Phone (978) 589-9919
Fax (978) 589-9921
Enumeration date Jan 16, 2007
Last updated in NPPES Dec 16, 2019
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 153362 | Other | MA | HARVARD PILGRIM |
| 4893790 | Other | MA | CIGNA |
| 0335801 | Medicaid | MA | - |
| W16273 | Other | MA | BCBS |
| 2217847 | Other | MA | UNITED HEALTHCARE |
| 461428 | Other | MA | TUFT |
| 99407 | Other | MA | FALLON |
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
What is the NPI number for Tak-Yin Chau?
The National Provider Identifier (NPI) for Tak-Yin Chau is 1346392990, a Type 1 (individual) record in the CMS NPPES registry.
Where does Tak-Yin Chau practice?
The practice location on file with NPPES is in Westford, MA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Joan Eagan Pediatrics Physician · Westford, MA NPI 1093702292 Michelle Sanders Pediatrics Physician · Westford, MA NPI 1164419347 David Watson Pediatrics Physician · Westford, MA NPI 1861489148 Sara Neville Pediatrics Physician · Westford, MA NPI 1801883087 Andreas Athanasiou Pediatrics Physician · Westford, MA NPI 1972590958 Cathy Sizer Pediatric Nurse Practitioner · Westford, MA NPI 1467449512 Christy Williams Dermatology Physician · Westford, MA NPI 1467442632 Brad Alpert Pediatrics Physician · Westford, MA NPI 1245209873
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-12-16.