Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Helen Ching-Yei Chang, MD

Individual provider Internal Medicine Physician · NPI 1639134687

Dr. Helen Ching-Yei Chang, MD is an Internal Medicine Physician in Mission Viejo, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

25982 Pala Ste 250
Mission Viejo, CA 92691-6719
Phone: (949) 588-0051
Fax: (949) 588-0052
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A65088 (CA)

Record details

NPI number1639134687
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 20, 2006
Last updated in NPPESJuly 13, 2026

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