Dr. Gary Maassen, MD

Dr. Gary Maassen, MD

Internal Medicine  ·  
Male  ·  
Age 58
Dr. Gary Maassen, MD is an internal medicine specialist in Saint Louis, MO and has been practicing for 29 years. He graduated from St Louis Univ Sch Of Med in 1986 and specializes in internal medicine.

5034 Griffin Rd

Saint Louis, MO 63128

Contact Information

(314) 843-7333

Insurance Accepted

  • Aetna
  • Anthem Blue Cross Blue Shield
  • Blue Cross Blue Shield
  • Cigna
  • HealthLink
  • Humana

*Please verify this information when scheduling an appointment.

Learn about Dr. Maassen

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Dr. Maassen's Experience

Dr. Maassen's experience matches your search based on the following criteria:
  • Based on total number of patients treated over the last 12 months
  • Specializes in Internal Medicine
  • Board certified in Internal Medicine
  • No sanctions found
  • No board actions found

1  Specialties

  • Internal Medicine

1  Board Certifications

  • Internal Medicine
    Accredited by: American Board of Internal Medicine*

132  Conditions Treated


Read Less

19  Procedures

  • Anemia and Iron Deficiency Screening
  • Cardiovascular Stress Test
  • Cholesterol Screening
  • Dementia or Depression Screening
  • Diabetes Counseling
  • Diabetes Screening
  • Electrocardiogram (EKG)
  • Fecal Occult Blood Test for Colorectal Cancer
  • Hepatitis C Virus Screening
  • Hepatitis Screening
  • Immunization
  • Liver Function Test
  • Osteoporosis Screening
  • Pap Smear
  • Prostate Cancer Screening
  • Pulmonary Function Test
  • Sexually Transmitted Infections Screening
  • Thyroid Screening
  • Wellness Examination

Background Check

Malpractice Claims not available

Healthgrades does not collect malpractice information for Missouri.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • St Louis Univ Sch Of Med
    Medical School | Graduated 1986
  • St Johns Med Ctr
    Residency Hospital | Completed 1989

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Maassen has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

Dr. Maassen does not have any memberships or affiliations listed. If you are Dr. Maassen and would like to add memberships or affiliations, please update your profile.

Dr. Maassen's Reviews

Likelihood of recommending Dr. Maassen to family and friends
4 total reviews (1 has a comment)

Likelihood to Recommend (4)

  • 5
  • 4
  • 3
  • 2
  • 1

Dr. Maassen's Performance

  • Trustworthiness

  • Explains condition(s) well

  • Answers questions

  • Time well spent


Office & Staff Performance

  • Scheduling

  • Office environment

  • Staff friendliness

  • Average wait time

    Under 10 minutes

Patient Comments (1)

Been seeing Dr Maassen for years and he is very professional and friendly. He's seen me through some rough illnesses and always took his time and great care.
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