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

Mark Janssen, MD

Individual provider Anatomic Pathology & Clinical Pathology Physician · NPI 1407923345

Mark Janssen, MD is an Anatomic Pathology & Clinical Pathology Physician in Anaheim, 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.

See every abbreviation used in this directory →

Practice location Address checks out

441 N Lakeview Ave
Anaheim, CA 92807-3028
Phone: (888) 988-2800
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anatomic Pathology & Clinical Pathology Physician (primary) Taxonomy 207ZP0102X · Licence A24214 (CA)

Record details

NPI number1407923345
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 29, 2006
Last updated in NPPESSeptember 23, 2008
Mailing address441 N Lakeview Ave, Anaheim, CA 92807-3028

Other providers in Anaheim