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Summary
Dr. John Massaro is an internal medicine physician who earned his Doctor of Osteopathy degree from the New York Institute of Technology College of Osteopathic Medicine. He completed his residency training at Nassau University Medical Center, building a strong foundation in comprehensive adult healthcare. With 29 years of experience in internal medicine, Dr. Massaro brings nearly three decades of expertise to his practice caring for adult patients.
Dr. Massaro practices at multiple locations throughout California, including French Hospital Medical Center, Watsonville Community Hospital, Sierra Vista Regional Medical Center, and California Men's Colony Hospital in San Luis Obispo and Watsonville. His clinical focus includes managing complex conditions such as type 2 diabetes, high blood pressure, and advanced kidney disease. He regularly performs essential diagnostic tests including complete blood counts and kidney function assessments to monitor his patients' health and guide treatment …decisions.
Read More Read less Dr. Massaro practices at multiple locations throughout California, including French Hospital Medical Center, Watsonville Community Hospital, Sierra Vista Regional Medical Center, and California Men's Colony Hospital in San Luis Obispo and Watsonville. His clinical focus includes managing complex conditions such as type 2 diabetes, high blood pressure, and advanced kidney disease. He regularly performs essential diagnostic tests including complete blood counts and kidney function assessments to monitor his patients' health and guide treatment …decisions.
Overview based on verified provider data
Quick Facts
- 29 years of experience
- 18 insurance plans accepted
- Nassau University Medical Center
- 1 specialty
- 8 areas of expertise
- 1 board certification
- 4 office locations
- Male
Office Locations
Dr. John Michael Massaro has 4 locationsCompare with Similar Doctors
 |  |  |  |
| Dr. John Michael Massaro, DO | Dr. George Mousa, MD | Dr. Nima Ghadimi, MD | Dr. Alaa Hajal, MD |
| Internal Medicine | Internal Medicine | Internal Medicine | Internal Medicine |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | |
| 29 Years of Experience | 17 Years of Experience | 29 Years of Experience | 15 Years of Experience |
| No Virtual Visit Option | Virtual Visit Available | Virtual Visit Available | Virtual Visit Available |
| Speaks English, Spanish | |||
| San Luis Obispo , CA | Upland , CA | Scottsdale , AZ | Diamond Bar , CA |
| Med School: New York Institute Of Technology College Of Osteopathic Medicine | Med School: University Of Aleppo Faculty Of Medicine | Med School: Univ Iberoamericana Unibe Santo Domingo | Med School: University Of Damascus Faculty Of Medicine |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. John Michael Massaro
Medical Specialties
Dr. John Michael Massaro has the following specialty
Specialty Expertise
Dr. John Michael Massaro has the following 8 areas of expertise
Certifications, License, & Education
29 Years Experience
Dr. John Michael Massaro holds an active medical license in the state of California.
Medical License
Doctor Of Osteopathy with an active medical license in the state of California that expires in 2027.
Education & Training
Residency
Completed their residency at Nassau University Medical Center.
Medical School
Graduated from New York Institute Of Technology College Of Osteopathic Medicine in 1997.
NPI Number
Dr. Massaro's NPI number is 1588665293.
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Frequently Asked Questions
- How can I make an appointment with Dr. John Massaro?
- You can find contact information for Dr. John Massaro here on Vitals.
- Where is Dr. John Massaro's office located?
- Dr. John Massaro's office is located at 1911 Johnson Ave, San Luis Obispo, CA, 93401.
- Does Dr. John Massaro accept virtual/telehealth appointments?
- Dr. John Massaro has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
- Is Dr. John Massaro accepting new patients?
- Dr. John Massaro has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
- Does Dr. John Massaro accept my insurance?
- You can see the insurance plans that Dr. John Massaro accepts on their Vitals profile.
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