Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Tracy A Lieu, M.D.

Pediatrics Physician in Chelmsford, MA · enumerated 2006.

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

National Provider Identifier

1770562316

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Registry record

Entity type Individual (Type 1)

Name Tracy A Lieu

Credential M.D.

Sex Female

Practice address 228 Billerica Rd, Chelmsford, MA, 01824

Phone (978) 250-6300

Enumeration date Jan 12, 2006

Last updated in NPPES Dec 13, 2021

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 158947 (MA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
158947	Other	MA	TUFTS
0137201	Medicaid	MA	-
J19972	Other	MA	BLUE CROSS
0022340	Other	MA	NEIGHBORHOOD HEALTH
PP901	Other	MA	HARVARD PILGRIM

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

How do I verify Tracy Lieu's NPI record?

Cross-check NPI 1770562316 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1770562316 active?

Yes, as of the latest NPPES snapshot, NPI 1770562316 is active (record last updated 2021-12-13).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-13.