Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Arthur King-Fan Tong, MBBS

Dermatology Physician in Waltham, MA · enumerated 2006.

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

National Provider Identifier

1619942661

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Registry record

Entity type Individual (Type 1)

Name Dr. Arthur King-Fan Tong

Credential MBBS

Sex Male

Practice address Waltham, MA, 02451

Phone (781) 522-9000

Fax (781) 522-4230

Enumeration date Feb 22, 2006

Last updated in NPPES Apr 23, 2009

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 56718 (MA) Primary

Other identifiers

Identifier	Type	State	Issuer
720378	Other	MA	TUFTS HEALTH PLAN
J08284	Other	MA	BCBS MA
3071961	Medicaid	MA	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1619942661 active?

Yes, as of the latest NPPES snapshot, NPI 1619942661 is active (record last updated 2009-04-23).

How do I verify Arthur Tong's NPI record?

Cross-check NPI 1619942661 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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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-04-23.