AMCAS, AACOMAS, TMDSAS

A Complete Comparison of AMCAS, AACOMAS, and TMDSAS: Choosing the Right Application System

Medical School
May 2, 2025

When applying to medical schools in the United States, understanding the differences among the three primary application systems—AMCAS, AACOMAS, and TMDSAS—is essential. Each system caters to different types of medical schools and has unique requirements, deadlines, and nuances. This blog provides a comprehensive comparison to help you choose the right application system and navigate the process confidently.

Choosing the right medical school application system—AMCAS, AACOMAS, or TMDSAS—can be overwhelming. AcceptMed provides expert insights into each platform’s requirements, deadlines, and nuances, helping you determine the best fit for your goals. Let us guide you in navigating these systems with confidence.

1. Overview of Each System

  • AMCAS (American Medical College Application Service)
    • Used for MD (allopathic) programs in most states.
    • Managed by the Association of American Medical Colleges (AAMC).
  • AACOMAS (American Association of Colleges of Osteopathic Medicine Application Service)
    • Exclusively for DO (osteopathic) programs.
    • Managed by the American Association of Colleges of Osteopathic Medicine (AACOM).
  • TMDSAS (Texas Medical & Dental Schools Application Service)
    • Used for public medical schools in Texas (both MD and DO).
    • Managed independently by the state of Texas.

2. Key Differences

Programs Covered

AMCAS – MD (Allopathic)
AACOMAS – DO (Osteopathic)
TMDSAS – MD, DO, and dental schools in Texas

Application Fee

AMCAS – $170 for the first school + $43 per additional school
AACOMAS – $197 for the first school + $48 per additional school
TMDSAS – $200 flat fee for all schools

Personal Statement Character Limits

AMCAS – 5,300 characters
AACOMAS – 5,300 characters
TMDSAS – 5,000 characters

Letters of Evaluation

AMCAS – Committee or individual letters
AACOMAS – Committee or individual letters
TMDSAS – Individual letters (submitted via the TMDSAS portal)

Work & Activities Section

AMCAS – Up to 15 entries
AACOMAS – Unlimited entries
TMDSAS – Unlimited entries

Verification Timeline

• AMCAS – Takes 4-6 weeks

• AACOMAS – Takes 3-4 weeks

• TMDSAS – Faster processing time (unique to Texas schools)

3. Choosing the Right System

  1. AMCAS
    • Best for applicants targeting MD programs outside of Texas.
    • Widely accepted and includes prestigious institutions.
  2. AACOMAS
    • Ideal for applicants drawn to the holistic approach of osteopathic medicine.
    • Includes programs that emphasize primary care and patient-centered practices.
  3. TMDSAS
    • Mandatory for Texas residents applying to public medical schools in the state.
    • Offers a cost-effective option with in-state tuition benefits.

4. Tips for Success

  1. Research Schools Thoroughly
    • Understand each program’s mission and align your application with their values.
  2. Meet All Deadlines
    • Start early and track deadlines carefully for each system.
  3. Tailor Your Application
    • Highlight experiences relevant to each system’s focus (e.g., holistic care for AACOMAS).

Choosing the right application system is a critical first step in your medical school journey. By understanding the differences among AMCAS, AACOMAS, and TMDSAS, you can create a targeted strategy that maximizes your chances of success.

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