Summary

Dr. John Koumas specializes in family medicine, providing comprehensive care for patients of all ages. They earned their medical degree from Western University of Health Sciences and completed residency training at Long Beach Memorial Medical Center. With 39 years of experience in practice, Dr. Koumas brings extensive knowledge to patient care. They are fluent in both English and Spanish.

Dr. Koumas is affiliated with UCI Health Fountain Valley and practices in Lake Forest, California. They have particular expertise in managing high blood pressure conditions, including hypertensive emergencies and pediatric hypertension. Dr. Koumas also performs various procedures such as dialysis treatments and blood work analysis. Patients have given them an average rating of 4.3 on Vitals.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.3
  • 39 years of experience
  • 67 insurance plans accepted
  • speaks English, Spanish
  • Long Beach Memorial Medical Center
  • 2 written reviews
  • 1 specialty
  • 7 areas of expertise
  • 1 hospital affiliation
  • 2 office locations

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. John Constantine Koumas has 2 locations

Lake Forest Medical Group

24401 Muirlands Blvd Ste ALake Forest, CA 92630
Mon9:00 am - 6:00 pm
Tue9:00 am - 6:00 pm
Wed9:00 am - 6:00 pm
Thu9:00 am - 6:00 pm
Fri9:00 am - 6:00 pm
SatClosed
SunClosed

Family Associated Medical Group

767 S Sunset Ave Ste 4West Covina, CA 91790
Mon9:00 am - 6:00 pm
Tue9:00 am - 6:00 pm
Wed9:00 am - 6:00 pm
Thu9:00 am - 6:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

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Dr. John Constantine Koumas, DODr. Peter N Mattar, MDDawn Vollmann, PA-CDr. Claudia Eppele, MD
Family MedicineFamily MedicineFamily MedicineFamily Medicine
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.3 
4.6 
39 Years of Experience 29 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish Speaks Spanish, French, English Speaks English Speaks English
Lake Forest , CANorco , CAHUNTINGTON BEACH , CACosta Mesa , CA
Med School: Western University Of Health Sciences Med School: Universidad Autonoma De San Luis Potosi Facultad De Medicina
Current Profile
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Insurance Plans Accepted by Dr. John Constantine Koumas

  • Accepts Medicare
  • AARP
  • Aetna
  • Aetna - HMO
  • Aetna - PPO
  • Alignment Health Plan
  • Alignment Health Plan - HMO
  • AltaMed Senior BuenaCare (PACE)
  • Anthem Blue Cross
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield of Illinois
  • Blue Cross Blue Shield of Texas
  • BLUE CROSS of CALIFORNIA
  • BLUE CROSS of CALIFORNIA - HMO
  • BLUE CROSS of CALIFORNIA - PPO
  • Blue Shield of California
  • Blue Shield of California - HMO
  • Bright Health
  • CalOptima
  • CalOptima - Medicaid (Managed)
  • CareSource
  • Cigna
  • Cigna - PPO
  • Commonwealth Care Alliance
  • Contra Costa Health Plan
  • Florida Blue: Blue Cross Blue Shield of Florida
  • Hawaii Medical Service Association (HMSA)
  • Health Alliance
  • Health Net
  • Health Net - HMO
  • HealthNow - EPO
  • HealthPartners
  • HealthScope Benefits
  • Humana
  • Humana - HMO
  • Humana - Medicare (Advantage HMO)
  • Humana - PPO
  • Inland Empire Health Plan
  • Kaiser Permanente
  • L.A. Care Health Plan
  • L.A. Care Health Plan - HMO
  • L.A. Care Health Plan - Medicaid (Managed)
  • Medi-Cal - Medicaid
  • Medicare
  • Medicare - Medicaid
  • Medicare - Medicaid (Managed)
  • Medicare - Medicare
  • Mercy Care
  • Meritain Health
  • Molina Healthcare
  • Molina Healthcare - Medicaid (Managed)
  • Nippon Life Benefits
  • Nippon Life Benefits - PPO
  • Optum Health
  • Optum Health - IPA
  • Optum Health - Medicare
  • PreferredOne
  • SCAN Health Plan
  • SCAN Health Plan - HMO
  • Tricare
  • UnitedHealthcare
  • UnitedHealthcare - HMO
  • UnitedHealthcare - Medicare
  • UnitedHealthcare - Medicare (Advantage HMO)
  • UnitedHealthcare - POS
  • UnitedHealthcare - PPO
  • UnitedHealthcare Oxford
  • Wellcare

Medical Specialties

Dr. John Constantine Koumas has the following specialty

Specialty Expertise

Dr. John Constantine Koumas has the following 7 areas of expertise

  • Check-up
  • Contraception
  • Family Planning
  • Immunization
  • Influenza
  • Weight Loss
  • Weight Loss (non-surgical)

Certifications, License, & Education

39 Years Experience

Education & Training

Residency

Completed their residency at Long Beach Memorial Medical Center.

Medical School

Graduated from Western University Of Health Sciences in 1987.

NPI Number

Dr. Koumas' NPI number is 1134111958.

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Frequently Asked Questions

Is Dr. John Koumas accepting new patients?
Dr. John Koumas is accepting new patients on Vitals. View Dr. John Koumas's profile on Vitals to make an appointment.
Does Dr. John Koumas accept my insurance?
You can see the insurance plans that Dr. John Koumas accepts on their Vitals profile.
What languages does Dr. John Koumas speak?
Dr. John Koumas speaks English and Spanish.
Which hospitals is Dr. John Koumas affiliated with?
Dr. John Koumas is affiliated with Uci Health Fountain Valley.
Where is Dr. John Koumas's office located?
Dr. John Koumas's office is located at 24401 Muirlands Blvd Ste A, Lake Forest, CA, 92630.

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