Paul A. Sack, MD
Provider is directly employed by MedStar Health

4.9 out of 5 (642 reviews)

Specialities: Endocrinology

Languages: English

(301) 625-1485

About me

Paul A. Sack, MD, started working at Medstar Union Memorial Hospital in 2005 after completing his medical training at the University of Maryland, School of Medicine.   He is the Assistant Chief in the Division of Endocrinology and Metabolism at Medstar Union Memorial Hospital.  He is involved in patient care, clinical research, and the education of medical students, residents, and endocrinology fellows.  

Dr. Sack's clinical interests include the management of Type 1 and Type 2 Diabetes, Thyroid Disease, Adrenal Disorders, and Pituitary Diseases.   He performs diagnostic thyroid and parathyroid ultrasounds and performs fine needle aspriation of thyroid nodules.

Dr. Sack currently serves on the Board of the Maryland Chapter of the American Diabetes Association. 

Dr. Sack has been named a Top Doctor in Baltimore magazine for Diabetes Care in 2013, 2016, 2017, 2019, and 2020.


Clinical areas of focus

  • Adrenal Disorders
  • Adrenal Mass
  • Cushing Syndrome
  • Diabetes Mellitus
  • Goiter
  • Graves Disease
  • Hashimoto Thyroiditis
  • Hypercalcemia
  • Hyperparathyroidism
  • Hyperthyroidism
  • Hypothyroidism
  • Insulin Pump
  • Insulin Resistance
  • Obesity
  • Osteoporosis
  • Pituitary Disorders
  • Pituitary Tumor
  • Polycystic Ovary Syndrome
  • Prediabetes
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Conditions and procedures

Conditions I treat

  • Abnormal Cortisol Level
  • Abnormal Glucose Metabolism
  • Acromegaly
  • Addisons Disease
  • Adrenal Adenoma
  • Adrenal Disorders
  • Adrenal Hyperplasia
  • Adrenal Lesions
  • Adrenal Mass
  • Adrenal Neoplasm
  • Adrenal Nodules
  • Calcium Metabolism
  • Cholesterol Disorders
  • Congenital Adrenal Hyperplasia
  • Congenital Hypothyroidism
  • Conn Syndrome
  • Cushing Syndrome
  • Diabetes Insipidus
  • Diabetes Mellitus
  • Diabetic Coma
  • Diabetic Ketoacidosis
  • Diabetic Nephropathy
  • Diabetic Neuropathy
  • Elevated Acth
  • Elevated Growth Hormone
  • Endocrine Complications Of Cancer Therapy
  • Endocrine Complications Of Transplant
  • Endocrine Disorders
  • Familial Dyslipidemia
  • Familial Hyperparathyroidism
  • Familial Hypocalciuric Hypercalcemia
  • Glucagonoma
  • Glucocorticoid Deficiency
  • Goiter
  • Graves Disease
  • Growth Disorders
  • Growth Hormone Abnormalities
  • Growth Hormone Deficiency
  • Gynecomastia
  • Hashimoto Thyroiditis
  • History Of Pituitary Mass
  • Hurthle Cell Cancer
  • Hyperaldosteronism
  • Hypercalcemia
  • Hyperglycemia
  • Hyperparathyroidism
  • Hyperthyroidism
  • Hypo Thalamic Pituitary Disorder
  • Hypocalcemia
  • Hypoglycemia
  • Hypogonadism
  • Hypoparathyroidism
  • Hypopituitarism
  • Hypothyroidism
  • Insulin Resistance
  • Insulinoma
  • Islet Cell Hyperplasia
  • Islet Cell Tumor
  • Low T3
  • Low T4
  • Male Infertility
  • Mccune Albright Syndrome
  • Metabolic Abnormalities
  • Metabolic Bone Diseases
  • Metabolic Syndrome
  • Moon Facies
  • Morbid Obesity
  • Multiple Endocrine Neoplasia
  • Multiple Endocrine Neoplasia Type 1
  • Multiple Endocrine Neoplasia Type 2
  • Multiple Endocrine Neoplasia Type 2A
  • Multiple Endocrine Neoplasia Type 2B
  • Myxedema
  • Nodular Goiter
  • Non Toxic Goiter
  • Obesity
  • Osteopenia
  • Osteoporosis
  • Panhypopituitarism
  • Parathyroid Adenoma
  • Parathyroid Cancer
  • Parathyroid Disease
  • Parathyroid Hyperplasia
  • Parathyroid Mass
  • Pheochromocytoma
  • Pituitary Adenoma
  • Pituitary Disorders
  • Pituitary Tumor
  • Polycystic Ovary Syndrome
  • Prediabetes
  • Secondary Amenorrhea
  • Secondary Hyperaldosteronism
  • Testicular Dysfunction
  • Testosterone Deficiency
  • Thyroid Cancer
  • Thyroid Cyst
  • Thyroid Disorder
  • Thyroid Nodule
  • Thyroid Storm
  • Thyroiditis
  • Thyrotoxic Exophthalmos
  • Thyrotoxicosis
  • Toxic Diffuse Goiter
  • Toxic Nodular Goiter
  • Type 1 Diabetes
  • Type 2 Diabetes
  • Virilizing Syndrome
  • Vitamin D Deficiency
  • Weight Problem
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Procedures I perform

  • Diabetes Education
  • Fine Needle Aspiration Of Thyroid
  • Insulin Pump
  • Insulin Therapy
  • Radioiodine Therapy
  • Testosterone Replacement Therapy
  • Thyroid Function Blood Panel
  • Thyroid Ultrasound
  • Ultrasound Guided Thyroid Biopsy
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Practice locations

Distance from Change LocationEnter your Location

200 East 33rd Street
Baltimore, MD, 21218


Fax 410-554-6490

Get Directions

miles away

Fax 410-554-6490

7106 Ridge Road
Baltimore, MD, 21237


Fax 410-391-0427

Get Directions

miles away

Fax 410-391-0427


MedStar Medical Group accepts most major health insurance plans. If you are uncertain as to whether your individual health insurance plan is accepted at MedStar Medical Group, please call your insurance company.

  • List of insurance plans we accept
    • Aetna Elect Choice/ EPO (Aetna Health Fund) Innovation Health: Network Only Plus
    • Aetna Quality Point of Service (POS)
    • Aetna USAccess (POS)
    • Aetna Student Health Insurance
    • Aetna Medicare Advantage HMO & PPO Plans
    • CFBCBS BlueChoice HMO
    • CFBCBS Blue Choice Opt Out Plus Open Access (POS)
    • CFBCBS Maryland Point of Service Plan (MPOS)
    • CFBCBS Federal Employee Program (Std. & Basic PPO)
    • CFBCBS Maryland Indemnity or PPO
    • CFBCBS (NCA) Indemnity
    • CIGNA HMO & Network (HMO)
    • CIGNA POS/Network POS
    • Great-West Healthcare POS/CIGNA
    • CIGNA Indemnity
    • Coventry Health Care of Virginia
    • Coventry of Delaware HMO/PPO
    • First Health PPO
    • Tricare Prime
    • Tricare Standard
    • Tricare Extra (Indemnity)
    • Tricare for Life (Medicare Supplemental Plan)
    • MedStar Family Choice - Maryland Health Choice
    • MedStar Select (MedStar Associates' Plan)
    • MedStar Medicare Choice
    • United Healthcare Select HMO - EPO/NPP
    • United Healthcare Select Plus (POS)
    • United Healthcare Choice Plus
    • United Student Resources
    • M.D. IPA (HMO)
    • M.D. IPA Preferred (POS)
    • Optimum Choice Preferred (POS) & OCI Direct (HMO)
    • Mamsi Life & Health (Indem./PPO)
    • Aetna Worker's Compensation Network
    • Coventry Health Care National Network PPO
    • Private Health Care Systems (PHCS) (PPO)
    • United Healthcare Options (PPO) (includes Empire PPO, GEHA, Compass Rose)
    • OneNet PPO, Inc.
    • United Healthcare Choice
    • United Healthcare Core Essential (HMO)
    • Optimum Choice
    • United Healthcare Navigate
    • United Healthcare Compass (HMO)
    • CIGNA HMO Open Access (OA)
    • Network OA
    • POS OA & OA Plus
    • PPO and PPO Plus
    • Choice Fund PPO
    • CFBSBC Blue Preferred PPO
    • HealthyBlue PPO
    • CFBCBS Blue Choice Opt Out Open Access
    • BlueChoice Open Access
    • Blue Choice Advantage & Healthy Blue (HMO, POS)
    • Aetna Traditional Choice (PPO)
    • Innovation Health: Indemnity
    • Aetna Open Choice (PPO)
    • Innovation Health: PPO
    • Aetna Managed Choice (POS)
    • Innovation Health: POS Plus
    • Aetna Elect Choice/ Open Access (POS)
    • Innovation Health: Open Network Only Plus
    • Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
    • Innovation Health: POS
    • Open HMO
    • Opoen HMO Option
    • Open EPO Plus
    • Aetna Managed Choice Open Access (POS)
    • Choice POS & Choice POS II
    • Innovation Health: Open POS Plus
    • Open POS II
    • Aetna HMO
    • Select HMO/HealthFund/Health Network
    • Aetna Innovations: HMO & EPO Plus



Board Certification: American Board of Internal Medicine, Endocrinology Diabetes and Metabolism

Board Certification: American Board of Internal Medicine, Internal Medicine

Fellowship Program: University of Maryland Medical Center (2005)

Residency Program: University of Maryland Medical Center (2003)

Medical School: University of Maryland School of Medicine (2000)


  • 2013, 2016-2017, 2019, 2020 Top Doctor, Baltimore magazine

News and publications

Damcott CM, Sack P, Shuldiner AR. The genetics of obesity. Endocrinology & Metabolism Clinics of North America. 32(4):761-86, 2003 Dec.

Streeten ES, Mohamed A, Ghandi A, Orwig D, Sack P, Sterling R, Pellegrini VD. The Inpatient Consultation Approach to Osteoporosis Treatment in Patients with Fracture. Is Automatic Consultation Needed? The Journal of Bone and Joint Surgery. 88:1968-1974, 2006.

Post W, Shen H, Damcott C, Arking DE, Kao WHL, Sack PA, Ryan KA, Chakravarti A, Mitchell BD, Shuldiner AR. Associations between Genetic Variants in the NOS1AP (CAPON) Gene and Cardiac Repolarization in the Old Order Amish. Human Heredity. 64: 214-219, 2007.

Roy-Gagnon MH. Weir MR. Sorkin JD. Ryan KA. Sack PA. Hines S. Bielak LF. Peyser PA. Post W. Mitchell BD. Shuldiner AR. Douglas JA. Genetic influences on blood pressure response to the cold pressor test: results from the Heredity and Phenotype Intervention Heart Study. [Journal Article. Research Support, N.I.H., Extramural. Research Support, Non-U.S. Gov't. Research Support, U.S. Gov't, Non-P.H.S.] Journal of Hypertension. 26(4):729-36, 2008 Apr.

Mitchell BD. McArdle PF. Shen H. Rampersaud E. Pollin TI. Bielak LF. Jaquish C. Douglas JA. Roy-Gagnon MH. Sack P. Naglieri R. Hines S. Horenstein RB. Chang YP. Post W. Ryan KA. Brereton NH. Pakyz RE. Sorkin J. Damcott CM. O'Connell JR. Mangano C. Corretti M. Vogel R. Herzog W. Weir MR. Peyser PA. Shuldiner AR. The genetic response to short-term interventions affecting cardiovascular function: rationale and design of the Heredity and Phenotype Intervention (HAPI) Heart Study. [Journal Article. Research Support, N.I.H., Extramural. Research Support, Non-U.S. Gov't] American Heart Journal. 155(5):823-8, 2008 May.

Evadnie Rampersaud, MSPH, PhD; Braxton D. Mitchell, PhD; Toni I. Pollin, PhD; Mao Fu, PhD; Haiqing Shen, PhD; Jeffery R. O’Connell, PhD; Julie L. Ducharme, MD; Scott Hines, MD; Paul Sack, MD; Rosalie Naglieri, MD; Alan R. Shuldiner, MD; Soren Snitker, MD, PhD. Physical Activity and the Association of Common FTO Gene Variants With Body Mass Index and Obesity. Arch Intern Med. 2008;168(16):1791-1797.

Streeten EA. McBride D. Puffenberger E. Hoffman ME. Pollin TI. Donnelly P. Sack P. Morton H. Osteoporosis-pseudoglioma syndrome: description of 9 new cases and beneficial response to Bisphosphonates. Bone. 43(3):584-90, 2008 Sep.

Shen H. Herzog W. Drolet M. Pakyz R. Newcomer S. Sack P. Karon H. Ryan KA. Zhao Y. Shi X. Mitchell BD. Shuldiner AR. Aspirin Resistance in healthy drug-naive men versus women (from the Heredity and Phenotype Intervention Heart Study). American Journal of Cardiology. 104(4):606-12, 2009 Aug 15.

Elena Forouhar and Paul Sack. Non-traditional therapies for diabetes: Fact or Fiction? Journal of Community Hospital Internal Medicine Perspectives. 2(2), 2012 July 16.

Elena Forouhar and Paul Sack. Non-traditional therapies for diabetes: Fact or Fiction? Journal of Community Hospital Internal Medicine Perspectives. 2(2), 2012 July 16.

Ratings and reviews

  • Provider explained things understandably

  • Provider listened carefully

  • Provider gave easy to understand instructions

  • Provider knew medical history

  • Provider showed respect

  • Provider spent enough time with patient

  • Aug 27, 2021

    Dr sack always listens and explains everything.

  • Aug 24, 2021

    Dr Sack always listen and answer any questions I may have.

  • Aug 12, 2021

    Dr. Sack was great. He took my health history very seriously and tried to look at things holistically and from his point of view. He listened thoroughly and was very compassionate and kind. I appreciated his time and what he could offer to my complex medical issue.