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

Dr. Stephan Robert Grigorian, MD

Individual provider Anatomic Pathology & Clinical Pathology Physician · NPI 1821129057

Dr. Stephan Robert Grigorian, MD is a Pathology in Corona, California. Qualified in 1993, 33 years ago. Practices with Boris Shlopov MD Pathology Medical Corporation, a 4-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
33
Licensed in
CA
In the registry since
2007
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

800 S Main St
Corona, CA 92882-3420
Phone: (858) 877-0267
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anatomic Pathology & Clinical Pathology Physician (primary) Taxonomy 207ZP0102X · Licence A88170 (CA)

Record details

NPI number1821129057
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 8, 2007
Last updated in NPPESAugust 29, 2022
Certification dateAugust 29, 2022
Mailing addressPo Box 4544, Mission Viejo, CA 92690-4544

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPATHOLOGY
Medical schoolOTHER
Graduated 1993 (33 years in practice)
Group practice Boris Shlopov Md Pathology Medical Corporation — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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