Eliza B. Geer, MD

Endocrinologist

Areas of Expertise

Conditions I Treat

Pituitary and skull base tumors
Cushing's disease
Acromegaly

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About Me

What I Do at MSK

Medical Director, Pituitary & Skull Base Tumor Center

Get To Know Me

I am an endocrinologist who specializes in caring for people with pituitary and neuroendocrine diseases.

I am the Medical Director of Memorial Sloan Kettering’s Multidisciplinary Pituitary & Skull Base Tumor Center, located at Memorial Hospital in Manhattan. At this center, we bring together experts from many areas — including neurosurgery, head and neck surgery, endocrinology, radiation oncology, and medical oncology — to offer comprehensive care for people with pituitary and skull base tumors.

Our multidisciplinary pituitary team provides personalized surgical and medical treatment for people with pituitary and skull base tumors, including prolactinomas, growth-hormone secreting adenomas (acromegaly), and Cushing’s disease. Our overall goal is to improve and advance the care of people with these conditions.

My research interests focus on achieving a better understanding of how and why pituitary tumors develop, and characterizing long-term outcomes in patients with Cushing’s disease. I have conducted a number of studies investigating body composition, adipose tissue regulation, and appetite in patients with Cushing’s disease, and I am involved in clinical trials investigating new medical therapies for patients with Cushing’s and acromegaly.

I completed my internship and residency at the NewYork-Presbyterian Hospital/Columbia Medical Center. I was a fellow in endocrinology and metabolism at the Icahn School of Medicine/Mount Sinai Medical Center, after which I was a member of the faculty for ten years. I am currently an associate professor of medicine and an active member of the Endocrine Society, the Pituitary Society, and the American Association of Clinical Endocrinologists.

My Role at MSK

An endocrinologist (EN-doh-krih-NAH-loh-jist) is a doctor with special training in endocrine problems. These disorders affect glands and organs that make hormones, and include diabetes, infertility, and thyroid, adrenal, and pituitary gland problems.

Conditions I Treat

Pituitary and skull base tumors
Cushing's disease
Acromegaly
Prolactinoma
Hypopituitarism
Craniopharyngioma
Diabetes
Adrenal tumors

Education

MD, Icahn School of Medicine at Mount Sinai

Residencies

NewYork-Presbyterian/Columbia University Medical Center

Fellowships

Icahn School of Medicine at Mount Sinai/Mount Sinai Medical Center

Board Certifications

Internal Medicine
Endocrinology, Diabetes, and Metabolism

Insurance Information

Understanding your insurance options is an important part of managing your cancer care. We have relationships with many common healthcare providers and plans.

Aetna

In Network Coverage Type
HMO, EPO PPO, POS, Transplant

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Aetna Medicare Advantage (MTA and NYC retirees only)

In Network Coverage Type
PPO

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Anthem BCBS and other BCBS licensee plans

In Network Coverage Type
PPO, POS, EPO, HMO

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Anthem BCBS Health Plus

In Network Coverage Type
HMO

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Anthem Blue Cross Medicare Advantage

In Network Coverage Type
PPO, HMO, DSN

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Blue Cross Blue Shield Federal Employee Program

In Network Coverage Type
HMO, PPO

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Blue Cross Blue Shield states outside of NY/NJ

In Network Coverage Type
HMO, EPO PPO, POS

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Carrum Health

In Network Coverage Type
Supplemental

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Cigna

In Network Coverage Type
PPO, POS, HMO

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Connecticare

In Network Coverage Type
POS, EPO, HMO

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Emblem

In Network Coverage Type
PPO, POS, EPO, HMO

Offers a qualified health plan from the Health Insurance Marketplace. Call Emblem to learn more.

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Emblem Essential

In Network Coverage Type
HMO

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Emblem Medicare Advantage (Medicare Choice PPO Network and VIP Prime Network Only)

In Network Coverage Type
PPO, HMO

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Empire Essential

In Network Coverage Type
HMO

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Empire Plan / NYSHIP (Blue Cross/UnitedHealthcare split plan)

In Network Coverage Type
PPO

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Fidelis

In Network Coverage Type
HMO, EPO

Offers a qualified health plan from the Health Insurance Marketplace. Call Fidelis to learn more.

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Fidelis Managed Medicaid & HARP

In Network Coverage Type
HMO

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Fidelis Medicare Advantage

In Network Coverage Type
HMO

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First Health

In Network Coverage Type
PPO

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Healthfirst

In Network Coverage Type
EPO, HMO, PPO, POS

Offers a qualified health plan from the Health Insurance Marketplace. Call Healthfirst to learn more.

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Healthfirst Managed Medicaid

In Network Coverage Type
HMO

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Healthfirst Medicare Advantage

In Network Coverage Type
HMO, PPO

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Healthsmart

In Network Coverage Type
PPO EPO

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Horizon Blue Cross Blue Shield New Jersey (HMO)

In Network Coverage Type
HMO

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Horizon Blue Cross Blue Shield New Jersey (PPO)

In Network Coverage Type
PPO

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Horizon Blue Cross Blue Shield New Jersey Omnia Tier I (EPO)

In Network Coverage Type
EPO

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Horizon Blue Cross Blue Shield New Jersey Omnia Tier II (EPO)

In Network Coverage Type
EPO

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Horizon Medicare Advantage

In Network Coverage Type
PPO, HMO

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Husky CT Medicaid

In Network Coverage Type
State Government

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Magnacare

In Network Coverage Type
PPO, POS, EPO

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Straight NJ Medicaid

In Network Coverage Type
State Government

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Straight NY Medicaid

In Network Coverage Type
State Government

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Medicare Part A&B (traditional Medicare)

In Network Coverage Type
Federal Government

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Multiplan/Beech Street/PHCS

In Network Coverage Type
Supplemental

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MVP

In Network Coverage Type
PPO/OAP

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Non-Participating Plans with Out of Network Benefits

In Network Coverage Type
PPO, POS, EPO, HMO

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NYC Medicare Advantage Plus for City Employees

In Network Coverage Type
TBD

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Oscar

In Network Coverage Type
HMO/EPO

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Oxford

In Network Coverage Type
PPO, EPO

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World Trade Center Health Program (WTC)

In Network Coverage Type
State Government

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Qualcare

In Network Coverage Type
PPO, POS, HMO

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Tricare

In Network Coverage Type
PPO, HMO

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UMR

In Network Coverage Type
PPO, POS

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United Healthcare

In Network Coverage Type
PPO, POS, HMO

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Don't see your carrier or plan? We can help you understand your coverage.

If you don't have health insurance or are worried that your care may not be fully covered, our financial assistance programs may be able to help.

If you have questions about insurance, call us at 646-497-9176.

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New Patients

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Current Patients

Request an appointment by logging on to MyMSK or calling your doctor’s office. If you aren’t registered for MyMSK, call 646-227-2593 for your Enrollment ID.

Contact and Location

Dr. Geer sees patients at two locations.

Office Phone

646-608-3797

Location

New York, NY

Looking to see a doctor at a different location? See all MSK locations.

Colleagues

Doctors at Memorial Sloan Kettering work as teams, with specialists from all different areas. This allows us to consider all your needs together, and to give you the best possible care.

See all Endocrinology Service doctors

See all Neurosurgery doctors

Clinical Trials

Clinical Trials Investigated by Dr. Geer
A Phase 2 Study of Pasireotide in People With Prolactinoma
Collecting Information about Treatment Results from Patients with Cushing's Syndrome

Find a Clinical Trial for You

Memorial Sloan Kettering's doctors and scientists are constantly developing new treatments for cancer. MSK is typically running hundreds of clinical trials at a given time.

You may be able to participate in a clinical trial even if you are new to MSK. Search our online directory to find trial information and see more about who can participate.

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Research and Publications

Publications on PubMed

Visit PubMed for a full listing of Dr. Geer’s journal articles. Pubmed is an online index of research papers and other articles from the US National Library of Medicine and the National Institutes of Health.

See all on PubMed

Disclosures

Doctors and faculty members often work with pharmaceutical, device, biotechnology, and life sciences companies, and other organizations outside of MSK, to find safe and effective cancer treatments, to improve patient care, and to educate the health care community.

MSK requires doctors and faculty members to report (“disclose”) the relationships and financial interests they have with external entities. As a commitment to transparency with our community, we make that information available to the public.

Eliza B. Geer discloses the following relationships and financial interests:

Chiasma, Inc.
Professional Services and Activities
Crinetics Pharmaceuticals, Inc.
Professional Services and Activities
H. Lundbeck A/S
Professional Services and Activities

HRA Pharma Rare Diseases
Professional Services and Activities
Recordati S.p.A.
Professional Services and Activities
Xeris Pharmaceuticals, Inc.
Professional Services and Activities

If you’re a patient at MSK and would like more information about your doctor’s external relationships, please talk with your doctor.

The information published here is a complement to other publicly reported data and is for a specific annual disclosure period. There may be differences between information on this and other public sites as a result of different reporting periods and/or the various ways relationships and financial interests are categorized by organizations that publish such data.

This page and data include information for a specific MSK annual disclosure period (January 1, 2023 through disclosure submission in spring 2024). This data reflects interests that may or may not still exist. This data is updated annually.

Learn more about MSK’s COI policies here. For questions regarding MSK’s COI-related policies and procedures, email MSK’s Compliance Office at [email protected].

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