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William Mark Posey

William Mark Posey, PhD

4.844 ratings, 5 reviews

Developmental-Behavioral Pediatrics

Accepting New Patients
Referral Required

Highlights

Age Groups Seen

  • Infants and Toddlers
  • Children 2-4
  • Children 5 and up
  • Teens

Languages

  • English

Gender

Male

Video

Locations

  1. Prisma Health Developmental Pediatrics – Columbia
    • 9 Richland Medical Park Drive, Suite 210, Columbia, SC 29203
    • Get Directions
  2. Prisma Health Developmental Pediatrics – Sumter

Expertise

Education

  • Professional School: University of South Carolina, Doctor of Philosophy (PhD)

Insurance

Note: Please contact your insurance provider to confirm participation
Search plans
  • Absolute Total Care - Ambetter
  • Absolute Total Care (Centene)
  • Aetna
  • Aetna Medicare
  • Allwell Medicare - Absolute Total Care
  • BCBS
  • BCBS Blue Essentials
  • BCBS PPC
  • BCBSSC Blue Reedy Exchange Product (Upstate)
  • BCBSSC State Health Plan (PEBA)
  • BlueChoice Health Plan
  • BlueChoice Medicaid - Healthy Blue
  • BlueChoiceMyChoice Advantage
  • Carelon Behavioral Health
  • Cigna
  • Cigna Medicare
  • Companion Benefit Alternatives
  • CorVel Workers Compensation
  • Evernorth Behavioral Health
  • FirstHealth (Aetna)
  • Healthy Connections
  • Humana - Healthy Horizons
  • Humana Choice Care
  • Humana Medicare
  • Liberty Advantage
  • Logistics Health
  • Magellan
  • MedCost
  • Medicare (Traditional Fee-for-Service)
  • Molina
  • Molina Medicaid
  • Multiplan/PHCS
  • NHC Advantage
  • Optum Behavioral Health
  • Promise Health Plan
  • SC Medicaid Healthy Connections
  • Select Health Medicare
  • Select Heath (First Choice)
  • Spectera
  • TriCare
  • UnitedHealthcare Medicare Advantage
  • Veterans Affairs Community Care Network - VACCN
  • Wellcare (Centene)

Ratings & Reviews

4.8 out of 5

44 ratings, 5 reviews

The Patient Satisfaction Rating is derived from patient surveys based on the likelihood to recommend this provider’s office.

Trust Provider with Care
Likely to Recommend
    5 out of 5 stars
    Reviewed on 12/24/2025

    Nothing, we were treated wonderfully

    5 out of 5 stars
    Reviewed on 12/21/2025

    Post-disappointment as far as her care is concerned.

    5 out of 5 stars
    Reviewed on 11/27/2025

    We felt very cared for during our visit.

    5 out of 5 stars
    Reviewed on 6/29/2025

    Dr Posey was great and very patient with my child! He does a great job with testing!

    5 out of 5 stars
    Reviewed on 6/10/2025

    I have nothing to offer, it was a great experience all the way around.

Need help scheduling? Call 803-434-6598

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