Andrew Tisser, DOEmergency Medicine Expert Witness
Credentials

Qualifications, stated accurately and verifiably.

This page is the canonical record of Dr. Tisser's board certification, education, licensure, and professional experience. Every item is current and defensible.

Curriculum vitae

The complete CV lists training, appointments, certifications, and professional history in full. Counsel are welcome to download it for conflict checks and disclosure.

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Education and board certification

Board Certification
Emergency Medicine (2018)
Medical Degree
Doctor of Osteopathic Medicine, NYIT College of Osteopathic Medicine
Residency
Emergency Medicine residency training
Graduate Business
MBA, Healthcare Management, Western Governors University (2023)

Professional certifications

CPE
Certified Physician Executive, American Association for Physician Leadership (2025)
CHCQM-PHYADV
Physician Advisor certification, American Board of Quality Assurance and Utilization Review Physicians (2022)
Credentials in Plain English

What each credential actually means.

Attorneys should not have to guess at physician certifications. Here is what each one signifies, in plain terms.

DODoctor of Osteopathic Medicine

A fully licensed physician degree, equivalent to an MD in scope of practice, licensure, and board certification. Osteopathic physicians complete the same residency training and specialty boards.

MBAMaster of Business Administration

A graduate business degree. In a clinical-legal context it reflects formal training in operations, systems, and data analysis, which is directly relevant to department-level and systems-failure questions.

CPECertified Physician Executive

A credential for physicians in healthcare leadership. It reflects formal training and examination in medical management, quality, and administration, awarded through the American Association for Physician Leadership.

CHCQM-PHYADVPhysician Advisor certification in Health Care Quality and Management

A certification focused on utilization review, medical necessity, and quality-of-care determinations. It reflects daily, structured analysis of medical records against accepted guidelines, awarded through the American Board of Quality Assurance and Utilization Review Physicians.

Licensure and Availability

Available nationwide. Licensed in 12 states.

Availability and licensure are stated separately and precisely, with no implication of licensure in all fifty states.

Board certification in Emergency Medicine is current.
Active medical licensure is maintained in 12 states: Florida, Illinois, Indiana, Kentucky, Louisiana, New Hampshire, New York, Oklahoma, South Carolina, Texas, Virginia, and Wisconsin.
Serving as an expert witness does not require licensure in the state where a case is venued. Specific court and jurisdictional requirements are confirmed for each matter.
Leadership and Appointments

Experience beyond the bedside.

Leadership and physician advisor roles built a discipline of analyzing records and writing defensible determinations. This experience strengthens record review. It is presented as analytical experience, not as clinical emergency medicine practice.

2026 to present

Medical Director, Utilization Management

Alignment Health

Prior authorization, concurrent, and retrospective review across a Medicare Advantage population using CMS coverage policy and evidence-based guidelines.

2023 to 2026

Medical Director, Claims Administration & Payment Integrity

Humana

Issued 30 to 35 clinical determinations daily, more than 8,000 annually, across Medicare appeals through the Administrative Law Judge level, with a written clinical rationale on every case.

2021 to 2023

Physician Advisor and Associate Chair, Emergency Medicine

Catholic Health System

Physician advisory and utilization alignment across a multi-site health system, alongside emergency department operations leadership.

2020 to 2021

Medical Director, Urgent Care

Rochester Regional Health

Operational leadership of an urgent care site, improving throughput, staffing continuity, and length of stay.

Professional Affiliations

Member of the leading physician quality and leadership bodies.

Active membership in the organizations that set standards for physician leadership, quality assurance, and utilization review.

ACPA

American College of Physician Advisors

ACHE

American College of Healthcare Executives

AAPL

American Association for Physician Leadership

ABQAURP

American Board of Quality Assurance and Utilization Review Physicians

Clinical Practice Settings

Emergency medicine, across every setting.

The standard of care is applied in context. Dr. Tisser has practiced across the full range of emergency environments.

Academic

Teaching institutions and resident supervision

Community

High-volume community emergency departments

Rural & Critical Access

Resource-limited, single-coverage settings

Trauma

Acute resuscitation and stabilization

Retain Dr. Tisser

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