Dr. Grennan graduated from the University of Nebraska College of Medicine in 1976. He works in Sacramento, CA and specializes in Hematology/Oncology. Dr. Grennan is affiliated with Kaiser Permanente Sacramento Medical Center.
Medical School: University of Nebraska College of Medicine; Graduated 1976
Please verify insurance information directly with your doctor's office as it may change frequently.
2025 Morse Ave
Sacramento, CA 95825