Summary

Dr. Gary Maassen has practiced internal medicine and surgery for 40 years. He treats asthma, pediatric asthma, and atrial fibrillation. He is affiliated with OSF Healthcare Saint Anthony's Health Center and sees patients in Saint Louis, Missouri. Dr. Maassen earned his medical degree from St. Louis University School of Medicine and completed his residency at St. John's Medical Center. Patients on Vitals rate Dr. Maassen 4.58 out of 5.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.6
  • 40 years of experience
  • 30 insurance plans accepted
  • speaks English
  • St Johns Medical Center
  • 4 written reviews
  • 2 specialties
  • 7 areas of expertise
  • 1 hospital affiliation
  • 3 office locations
  • Male

Patients’ Perspective

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

Office Locations

Dr. Gary Anthony Maassen has 3 locations

South County Internal Medicine

5034 Griffin RdSaint Louis, MO 63128
Mon8:00 am - 4:30 pm
Tue8:00 am - 4:30 pm
Wed8:00 am - 4:30 pm
Thu8:00 am - 4:30 pm
Fri8:00 am - 4:30 pm
SatClosed
SunClosed

Mercy Hospital South

10010 Kennerly RdSaint Louis, MO 63128

Kindred Hospital Saint Louis South

10018 Kennerly RdSaint Louis, MO 63128

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Dr. Gary Anthony Maassen, MDDr. Delene Musielak, MDDr. Adewumi Bakare DMSc, PA-CEric Harker
Internal MedicineInternal MedicineInternal MedicineInternal Medicine
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.6 
4.5 
0 
4 
40 Years of Experience 25 Years of Experience
No Virtual Visit Option No Virtual Visit Option Virtual Visit Available Virtual Visit Available
Speaks English Speaks English Speaks English, Spanish, Yoruba, French, Russian, Arabic, Chinese, Chinese (Mandarin) Speaks English
Saint Louis , MOCreve Coeur , MOMesquite , TXLyons , CO
Med School: St Louis University School Of Medicine Med School: Ross University School of Medicine Med School: University of Lynchburg - DMSc Med School: Duke University School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Gary Anthony Maassen

  • Accepts Medicaid
  • AARP
  • Aetna
  • Aetna - HMO
  • Aetna - Medicare
  • Aetna - Medicare (Advantage HMO)
  • Aetna - POS
  • Anthem Blue Cross
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield - Federal Employees Program
  • CHAMPVA
  • Cigna
  • ESSENCE Healthcare
  • ESSENCE Healthcare - Medicare
  • ESSENCE Healthcare - Medicare (Advantage HMO)
  • First Health (Coventry Health Care)
  • GEHA
  • Healthlink
  • Healthlink - PPO
  • Humana
  • Medicare
  • Medicare - Medicaid
  • Medicare - Medicare
  • Meritain Health
  • UnitedHealthcare
  • UnitedHealthcare - Medicare
  • UnitedHealthcare - Medicare (Advantage HMO)
  • UnitedHealthcare - PPO
  • UnitedHealthOne
  • WPS Health Plan
  • WPS Health Plan - Medicare

Medical Specialties

Dr. Gary Anthony Maassen has the following 2 specialties

Specialty Expertise

Dr. Gary Anthony Maassen has the following 7 areas of expertise

  • Check-up
  • Heartburn
  • Immunization
  • Physical
  • Surgery
  • Vaccination
  • Weight Loss

Certifications, License, & Education

40 Years Experience

Education & Training

Residency

Completed their residency at St Johns Medical Center.

Medical School

Graduated from St Louis University School Of Medicine in 1986.

NPI Number

Dr. Maassen's NPI number is 1831170968.

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Frequently Asked Questions

Does Dr. Gary Maassen accept my insurance?
You can see the insurance plans that Dr. Gary Maassen accepts on their Vitals profile.
How can I make an appointment with Dr. Gary Maassen?
You can find contact information for Dr. Gary Maassen here on Vitals.
Does Dr. Gary Maassen accept virtual/telehealth appointments?
Dr. Gary Maassen has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Is Dr. Gary Maassen accepting new patients?
Dr. Gary Maassen is accepting new patients on Vitals. View Dr. Gary Maassen's profile on Vitals to make an appointment.
What languages does Dr. Gary Maassen speak?
Dr. Gary Maassen speaks English.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

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