Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stewart T Hou, M.D.

Diagnostic Radiology Physician in Lawrence, MA · enumerated 2006.

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

National Provider Identifier

1164493821

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Registry record

Entity type Individual (Type 1)

Name Dr. Stewart T Hou

Credential M.D.

Sex Male

Practice address 1 General St, Lawrence General Hospital, Lawrence, MA, 01841

Phone (978) 946-8103

Fax (978) 946-8067

Enumeration date Jan 31, 2006

Last updated in NPPES Nov 3, 2017

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 209980 (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
11666526	Other	-	CAQH
1164493821	Other	NH	NH ANTHEM BC/BS
41851	Other	MA	HEALTHY START
1164493821	Other	MA	MA BC/BS
3096864	Medicaid	NH	-
110002939A	Medicaid	MA	-
1163479	Other	MA	AETNA
65479	Other	MA	FALLON
3374068	Other	MA	CIGNA
AA54772	Other	MA	HPHC

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 this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Stewart Hou?

Stewart Hou is registered in NPPES with the primary taxonomy of Diagnostic Radiology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-11-03.