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

Mark D Calayag, MD

Individual provider Neurological Surgery Physician · NPI 1336373901

Mark D Calayag, MD is a Neurological Surgery Physician in Orange, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2009
Specialties on file
2
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

200 S Manchester Ave Ste 210
Orange, CA 92868-3217
Phone: (714) 456-6966
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurology with Special Qualifications in Child Neurology Physician (primary) Taxonomy 2084N0402X · Licence A137268 (CA)
Neurological Surgery Physician Taxonomy 207T00000X · Licence 137268 (CA)

Record details

NPI number1336373901
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 11, 2009
Last updated in NPPESJanuary 3, 2025
Certification dateJanuary 3, 2025
Mailing address200 S Manchester Ave, Suite 210, Orange, CA 92868-3217

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