Executive Leadership

Walid Michelen, M.D.
Chief Executive Officer /Chief Medical Officer

Prior to becoming the CEO and CMO of Gotham Health , Dr. Michelen was a member of the leadership team at the Generations Plus/Northern Manhattan Network, which consists of two hospitals (Harlem and Lincoln); Gotham Health hub sites Belvis, Morrisania and Renaissance Health Care Network Diagnostic and treatment centers; eight satellite sites and 12 school-based health centers. He has served in various capacities at the Network, including Chief of Staff and Medical Director and Director of Business Development and Grants.

Dr. Michelen led the Network's successful efforts to collaborate with community-based organizations on many important projects to increase access and delivery of services to targeted populations, such as taxicab drivers, small-business owners, and faith-based organizations. Under his leadership, the Network successfully implemented the Patient-Centered Medical Home model.

As a physician specializing in internal medicine, Dr. Michelen is recognized by both health care and academic institutions for his commitment to improving community health. He has served as the Chairman of the Community Core for Columbia University's Center for the Health of Urban Minorities. He was also the Principal Investigator for New York Presbyterian Hospital's Community Access Program, a five-year grant from the U.S. Health Resources and Services Administration to improve health care access and chronic disease management for minority communities in Northern Manhattan. Dr. Michelen's extensive experience in community-based participatory research earned him the role of Chairman of the Health Promotion/Disease Prevention Core for the Northern Manhattan Community Voices Project; a $5-million program funded by the Kellogg Foundation.

Dr. Michelen has received Bridges to Excellence Medical Home recognition from the Health Care Incentives Improvement Institute for demonstrating effective use of systematic office processes to improve patient outcomes, especially for patients with chronic conditions. He was also recognized by the National Committee for Quality Assurance for delivering high-quality care to patients with diabetes and for his work in Patient-Centered Medical Home.

A national leader in Latino/Hispanic health, Dr. Michelen was appointed by the Clinton Foundation to serve as the Project Coordinator to plan and establish HIV clinics throughout the Dominican Republic.

In addition to his commitment to Gotham Health serving as the Chief Executive Officer and Chief Medical Office, Dr. Michelen is also an assistant professor at Columbia University College of Physicians and Surgeons, Department of Medicine.

Dr. Michelen received his medical degree from Cornell University Medical School in 1977 and has been a primary care physician in New York since 1980. Among positions held, he was Medical Director of North Central Bronx Hospital from 1991-1994, Chief Medical Officer for NYC health + Hospitals from 1994 to 1997, and Vice President and Chief Medical Officer for Community Health of New York Presbyterian Hospital from 1997-2004.

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Michelle Lewis
Chief Operating Officer

Ms. Lewis, as a transformation leader, provides direction and coordination for a broad range of initiatives to advance Gotham’s vision and organizational success. Through her leadership and vision Ms. Lewis is making significant contributions to Gotham health’s strategic direction by driving change across the network.  These changes aimed at improving our patient experience and increasing their access to care on a timely basis.

Ms. Lewis is an accomplished healthcare administrator, who is recognized for her visionary leadership. She has over 15 years of experience in leading people, building teams, project management, and expanding healthcare programs.
Prior to joining NYC Health + Hospitals, Ms. Lewis worked for New York Presbyterian Health Systems, where she held various position, including overseeing the Emergency Services Department and the Community – Based Ambulatory Care Health Centers.  Her strong interest in delivering high quality of health care services and the overall wellbeing of medically underserved communities is reflected in her achievements during her career as a public health executive.

Ms. Lewis received her Bachelor of Art Degree from Lehman College in New York.

She earned a Master’s degree in Public Administration from Farleigh Dickinson University in New Jersey. She is presently an adjunct professor at Fairleigh Dickinson University in the Departments of Master in Public Administration and Master in Public Health. Return to top

Elsa Cosme
Chief Financial Officer

Ms. Cosme joined NYC Health and Hospital/ Gouverneur Health assuming the role of Chief Financial Officer and recently became the Chief Financial Officer for Gotham Health FQHC, Inc. She received a Bachelor of Science Degree in Accounting from Hunter College and Masters in Business Administration from Farleigh Dickinson University.

Ms. Cosme brings to Gotham Health over 20 years’ experience in health care, commercial real estate investment, and non-profit financial management. Her background includes audit coordination, internal controls, budgeting, grants management and financial statement preparation.

Before coming to H+H, Ms. Cosme assisted the Sr. Vice President/CFO in achieving organizational goals with regard to financial operations of the Bronx-based SBH Health System which comprises acute care-461 beds, long-term care and outpatient care. There she successfully drove Finance Department improvements, strengthening controls, accuracy and timeliness of processes including general accounting, accounts payable, treasury, tax reporting, audit, cashier and payroll.

As Gotham’s Chief Financial Officer, Ms. Cosme oversee all aspects of Gotham Health FQHC financial functions including, reporting, budgeting, reimbursement, billing and collection, managed care, medical record and registration .  Elsa also leads the financial strategic planning process and provide financial reports and presentation to Gotham Board. Ms. Cosme supports the CEO and woks with H + H central office Finance to make sure all goals and objectives are being met.

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Carey Hamblin
Chief Nursing Officer

Ms. Hamlin has 20 years’ experience working in the healthcare industry from Nursing to Administration.  Carey has practiced in a variety of settings including large healthcare corporations, medical centers and community hospitals which has proven her ability to assist patients effectively in any size setting.
Early in her career Ms. Hamblin worked as R.N. at Phelps Memorial Hospital in the Emergency Department where she exhibited skills of efficiency and passion about delivering the highest quality of care to patients.  With experience and skills such as Nursing Leadership, Crisis Management, Conflict/ Complaint Resolution and Healthcare Standards Carey is a strong team leader.
Ms. Hamblin has been with North Bronx Healthcare Network for 10 years climbing the corporate ladder. Her current role as Chief Nursing Officer where she is the lead responsible to implement DSRIP projects and initiatives.  She provides strategic leadership and oversees nursing development and clinical functions at Gotham Health.

Ms. Hamblin received her Master’s degree in Leadership and Management from Western Governors University. Nursing from Mountainside Hospital School of Nursing Return to top

Tamika Howell
Director of Health Care Standards

Tamika Howell has been working with clinical populations in urban and rural settings for over twenty years.  She has worked in a range of settings including community-based organizations; residential treatment facilities; group homes; hospital/ambulatory care administration, and psychiatric inpatient and outpatient units; schools and independent living programs.

Ms. Howell is currently the Director of Health Care Standards for New York City Health+ Hospitals, Gotham Health and Ambulatory Care.  Ms. Howell has extensive program evaluation/quality improvement and grant-writing experience, supporting organizations such as: Head Start, parenting education programs, non-profit social service agencies, HIV/AIDS support agencies, and state-funded literacy programs.

Independently, Ms. Howell has worked with a New York City private school, evaluating parent satisfaction.  Her latest independent endeavor is the evaluation of a financial literacy campaign, assessing knowledge acquisition and participant satisfaction. She combines her clinical skills with expertise in evaluation and statistics to provide a well­ rounded approach to developing and implementing effective evaluation plans that take all stakeholders into account.

Tamika holds a Master's degree in School Psychological Services from New York University.

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