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

Dr. Justin Edward Grenet, MD

Individual provider Hematology & Oncology Physician · NPI 1770102915

Dr. Justin Edward Grenet, MD is a Hematology & Oncology Physician in Santa Rosa, California. Licensed in California. Registered with an NPI since 2020.

Licensed in
CA
In the registry since
2020
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

3555 Round Barn Cir
Santa Rosa, CA 95403-1757
Phone: (707) 528-1050
Fax: (707) 525-3874
Show map & directions

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

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence A209369 (CA)

Record details

NPI number1770102915
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 8, 2020
Last updated in NPPESJune 30, 2026
Certification dateJune 30, 2026

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