Summary

Dr. Timmothy Merrigan has practiced family medicine for 31 years. He treats high cholesterol in children and teens, hyperlipidemia, and heart failure, and offers virtual care. Dr. Merrigan earned his medical degree from the Medical College of Wisconsin and completed his residency at Kaiser Permanente Medical Center. He sees patients in Walnut Creek and San Leandro, California.

Overview based on verified provider data

Quick Facts

  • 3.1
  • 31 years of experience
  • 15 insurance plans accepted
  • Kaiser Permanente Medical Center
  • 4 written reviews
  • 1 specialty
  • 6 areas of expertise
  • 4 office locations
  • Male

Patients’ Perspective

  • Flexible scheduling

Office Locations

Dr. Timmothy O Merrigan has 4 locations

The Permanente Medical Group Inc Park Shadelands Medical Offices

320 Lennon LnWalnut Creek, CA 94598
Mon8:30 am - 5:00 pm
Tue8:30 am - 5:00 pm
Wed8:30 am - 5:00 pm
Thu8:30 am - 5:00 pm
Fri8:30 am - 5:00 pm
SatClosed
SunClosed

Kaiser Permanente Antioch Medical Center

4501 Sand Creek RdAntioch, CA 94531

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Dr. Timmothy O Merrigan, MDJennifer Lau, PA-CCharles Reppe, PA-CReanna Lynn Clayton MSN, FNP-C
Family MedicineFamily MedicineFamily MedicineFamily Medicine
Accepts New Patients Accepts New Patients Accepts New Patients
3.1 
0 
0 
0 
31 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option Virtual Visit Available
Speaks English Speaks English Speaks English
Walnut Creek , CASan Leandro , CAOakland , CATempleton , CA
Med School: Medical College Of Wisconsin
Current Profile
View Profile View Profile View Profile

Insurance Plans Accepted by Dr. Timmothy O Merrigan

  • Accepts Medicare
  • Aetna
  • Anthem Blue Cross
  • BLUE CROSS of CALIFORNIA
  • BLUE CROSS of CALIFORNIA - HMO
  • Cigna
  • Contra Costa Health Plan
  • Kaiser Permanente
  • Kaiser Permanente - DHMO
  • Kaiser Permanente - HMO
  • Kaiser Permanente - Medicaid (Managed)
  • Medicare - Medicare
  • Three Rivers Providers Network (TRPN) - Medicaid (Managed)
  • UnitedHealthcare
  • UnitedHealthcare - HMO
  • UnitedHealthcare - Medicare

Medical Specialties

Dr. Timmothy O Merrigan has the following specialty

Specialty Expertise

Dr. Timmothy O Merrigan has the following 6 areas of expertise

  • Check-up
  • Contraception
  • Family Planning
  • Immunization
  • Influenza
  • Weight Loss

Certifications, License, & Education

31 Years Experience

Dr. Timmothy O Merrigan holds an active medical license in the state of California.

Medical License

Medical Doctor with an active medical license in the state of California that expired in 2026.

Education & Training

Residency

Completed their residency at Kaiser Permanente Medical Center.

Medical School

Graduated from Medical College Of Wisconsin and Medical College Of Wisconsin in 1995.

NPI Number

Dr. Merrigan's NPI number is 1063442945.

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Frequently Asked Questions

How can I make an appointment with Dr. Timmothy Merrigan?
You can find contact information for Dr. Timmothy Merrigan here on Vitals.
Does Dr. Timmothy Merrigan accept virtual/telehealth appointments?
Dr. Timmothy Merrigan has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Where is Dr. Timmothy Merrigan's office located?
Dr. Timmothy Merrigan's office is located at 320 Lennon Ln, Walnut Creek, CA, 94598.
Does Dr. Timmothy Merrigan accept my insurance?
You can see the insurance plans that Dr. Timmothy Merrigan accepts on their Vitals profile.
Is Dr. Timmothy Merrigan accepting new patients?
Dr. Timmothy Merrigan has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards

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