Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. John Harold Ernsberger, MD

Individual provider Internal Medicine Physician · NPI 1720330301

Dr. John Harold Ernsberger, MD is an Internal Medicine Physician in Anaheim, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2012
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

3055 W Orange Ave
Anaheim, CA 92804-3159
Phone: (714) 527-7559
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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 A43611 (CA)

Record details

NPI number1720330301
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 8, 2012
Last updated in NPPESOctober 8, 2012

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