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Robert Sing-Yick Chang, MD

Pulmonary Disease Physician in Torrance, CA · enumerated 2006.

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

National Provider Identifier

1902885833

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Registry record

Entity type Individual (Type 1)
Name Robert Sing-Yick Chang
Credential MD
Sex Male
Practice address 3701 Skypark Dr, #200, Torrance, CA, 90505
Phone (310) 378-8900
Fax (310) 791-0786
Enumeration date Jan 10, 2006
Last updated in NPPES May 10, 2013

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 52937 (CA) Secondary
207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 52937 (CA) Secondary
207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 52937 (CA) 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
1902885833 Medicaid CA -
00G267250 Medicaid CA -
1902885833 Other CA CCS PANELED

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 Robert Chang?
Robert Chang is registered in NPPES with the primary taxonomy of Pulmonary Disease 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 2013-05-10.