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Dr. Michael S. Duffy Sr, MD

Internal Medicine

Dr. Duffy Sr's Overview

Dr. Michael S. Duffy Sr graduated from the Kansas City University of Medicine and Biosciences College of Osteopathic Medicine in 1994. He works in San Diego, CA and specializes in Internal Medicine. Dr. Duffy Sr is affiliated with Alvarado Parkway Institute Behavioral Health System, Scripps Mercy Hospital and Sharp Grossmont Hospital.

Dr. Duffy Sr's Experience

Years in Practice: 21

Dr. Duffy Sr's Specialties

Internal Medicine

Dr. Duffy Sr's Education & Training

Medical School: Kansas City University of Medicine and Biosciences College of Osteopathic Medicine; Graduated 1994

Dr. Duffy Sr's Rating

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Overall Rating


  • Explains conditions & treatments
  • Takes time to answer my questions
  • Provides follow-up as needed
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Dr. Duffy Sr's Accepted Insurance

  • Aetna Choice POS II
  • Aetna Managed Choice POS Open Access
  • Aetna Savings Plus of CA
  • Aetna Signature Administrators PPO
  • UHC Choice Plus POS
  • UHC Navigate HMO
  • UHC Navigate POS
  • UHC Options PPO
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Dr. Duffy Sr's Office Information & Appointments

Office Locations

Mobile Physician Services
Pacific Medical Care & Mobile Physicians Services

1501 5th Ave
San Diego, CA 92101
(619) 461-3717


Office Hours and Information

Fax: (619) 461-5663

Practice Website:

Accepting New Patients: Yes

Medicare Accepted: Yes

Medicaid Accepted: Yes

Monday 8:00 AM - 5:00 PM
Tuesday 8:00 AM - 5:00 PM
Wednesday 8:00 AM - 5:00 PM
Thursday 8:00 AM - 5:00 PM
Friday 8:00 AM - 5:00 PM
Saturday Closed
Sunday Closed

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