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    Dr. Maassen's Overview

    Dr. Maassen graduated from the Saint Louis University School of Medicine in 1986. He works in Saint Louis, MO and specializes in Internal Medicine. Dr. Maassen is affiliated with Des Peres Hospital and Saint Anthonys Health Center.

    Dr. Maassen's Experience

    Years in Practice: 31

    Dr. Maassen's Specialties

    Internal Medicine

    Dr. Maassen's Education & Training

    Medical School: Saint Louis University School of Medicine; Graduated 1986

    Dr. Maassen's Rating

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    Overall Rating


    • Explains conditions & treatments
    • Takes time to answer my questions
    • Provides follow-up as needed
    • View All Ratings

    Dr. Maassen's Accepted Insurance

    Please verify insurance information directly with your doctor's office as it may change frequently.

    • Aetna Choice POS II
    • Aetna HMO
    • Aetna Managed Choice POS Open Access
    • Aetna Signature Administrators PPO
    • Anthem Blue Access PPO
    • Anthem Blue Preferred HMO
    • Anthem Blue Preferred Plus POS
    • Anthem MO Blue Preferred Options
    • Anthem MO Direct Access w/HSA
    • Anthem MO Pathway X
    • View More

    Dr. Maassen's Office Information & Appointments

    Office Locations

    Esse Health

    5034 Griffin Rd
    Saint Louis, MO 63128
    (314) 843-7333


    Office Hours and Information

    Fax: (314) 843-9946

    Practice Website:

    Accepting New Patients: Yes

    Medicare Accepted: Yes

    Medicaid Accepted: No

    Monday 8:00 AM - 4:30 PM
    Tuesday 8:00 AM - 4:30 PM
    Wednesday 8:00 AM - 4:30 PM
    Thursday 8:00 AM - 4:30 PM
    Friday 8:00 AM - 4:30 PM
    Saturday Closed
    Sunday Closed

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    Dr. Maassen's Hospital Affiliations

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