Maureen Donnelly Passaro, MD| Endocrinology Diabetes and Metabolism, Endocrinology | MedStar Health
Print this profile
Maureen Donnelly Passaro

Maureen Donnelly Passaro, MD
Provider is directly employed by MedStar Health

4.8 out of 5 (3452 reviews)

Specialties: Endocrinology Diabetes and Metabolism, Endocrinology

Languages: English

301-570-7002

About me

Dr. Passaro's practice philosophy is to provide comprehensive care in a caring and efficient manner. She resides in Montgomery County with her husband and three children.

Dr. Passaro was recognized by Washingtonian magazine as a Top Doctor.

Dr. Passaro sees patients at:
18109 Prince Philip Dr
Suite B200
Olney, MD 20832
301-774-4529

Clinical areas of focus

  • Diabetes Screening
  • Hormone Replacement Therapy
  • Hyperthyroidism Treatment
  • Hypothyroidism Treatment
  • Osteoporosis Risk Assessment
  • Pioglitazone Therapy
Show More

Procedures I perform

  • Acromegaly Treatment
  • Adrenal Gland Surgery
  • Adrenal Insufficiency Treatment
  • Aldosteronoma Treatment
  • Celiac Plexus Block
  • Continuous Glucose Monitoring System
  • Cushing's Syndrome Treatment
  • Dexamethasone Suppression Test
  • Diabetes Prevention
  • Diabetes Screening
  • Dopamine Therapy
  • Enterectomy
  • Familial Hypocalciuric Hypercalcemia (FHH) Treatment
  • Fine-Needle Aspiration Of Thyroid Nodule
  • Glucose Control Management
  • Goiter Treatment
  • Grave's Disease Treatment
  • Growth Hormone Follow-Up
  • Hashimoto's Thyroiditis Treatment
  • Homocysteine Lowering Therapy
  • Hormone Replacement Therapy
  • Hormone Therapy For Pituitary Disorders
  • Hypercalcemia Treatment
  • Hyperglycemic Hyperosmolar State Treatment
  • Hyperparathyroidism-Jaw Tumor Syndrome Treatment
  • Hyperthyroidism Treatment
  • Hypothyroidism Treatment
  • Insulin Resistance Treatment
  • Kidney Disease Treatment
  • Lipid Disorder Treatment
  • Multiple Endocrine Neoplasia (MEN) Testing
  • One-On-One Diabetes Education
  • Osteoporosis Prevention Treatment
  • Osteoporosis Risk Assessment
  • Parathyroid Tumor Surgery
  • Pheochromocytoma Treatment
  • Pioglitazone Therapy
  • Pituitary Apoplexy Treatment
  • Pituitary Hormone Deficiency Treatment
  • Pituitary Tumor Treatment
  • Polycystic Ovary Syndrome (PCOS) Treatment
  • Prediabetes Management
  • Purine Nucleoside Phosphorylase Deficiency Treatment
  • Testicular Ultrasound
  • Thyroid Cancer Treatment
  • Thyroid Cyst Treatment
  • Thyroid Nodule Treatment
  • Thyroid Storm Surgery
  • Thyroidectomy
  • Thyroiditis Treatment
  • Weight Management Program
Show All button Press enter to expand Show Less

Practice locations

Distance from Change Location Enter your Location

18109 Prince Philip Dr
Ste B-200
Olney, MD, 20832

301-570-7770
Get Directions

miles away

Fax 855-256-6851

Insurance

This list represents the major payors accepted by MedStar Health.

NOTE: Payor contracts change and not all plans associated with a payor may be covered. Payors may offer multiple plans. If you have a question related to your insurance, please contact your insurance plan directly. Contact information is located on your health insurance ID card.

*Denotes limited participation. Specific providers and practices may NOT be participating. Please contact your insurance plan directly.

  • List of insurance plans we accept
    • Aetna
    • CareFirst BlueCross BlueShield of Maryland
    • Cigna Health Care
    • Kaiser Permanente*
    • MedStar Select (Administered by CareFirst)
    • United HealthCare
    • Aetna
    • CareFirst BlueCross BlueShield of Maryland
    • Healthspring
    • Humana
    • Medicare & Railroad Medicare
    • United HealthCare
    • Aetna Better Health of Maryland *
    • Medical Assistance/Medicaid
    • MedStar Family Choice MD
    • Priority Partners *
    • United HealthCare Community Health Plan MD
    • Wellpoint MD
    • AmeriHealth Caritas
    • Health Services For Children With Special Needs (HSCSN)
    • Medical Assistance/Medicaid
    • MedStar Family Choice DC
    • Johns Hopkins Employer Health Programs *
    • Johns Hopkins US Family Health Plan *
    • MultiPlan
    • Private Healthcare Systems
    • Tricare/Humana Military
    • VA Community Care Network (VACCN)

Education

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

Board Certification: American Board of Internal Medicine, Internal Medicine

Residency: National Institutes of Health (1996)

Residency: Stamford Hospital (1993)

Medical School: New York Medical College (1990)

Ratings and reviews

  • Explanations the care provider gave you about your problem or condition

    4.9
  • Extent to which the care provider listened to you

    4.9
  • Care provider’s discussion of any proposed treatment (options, risks, benefits, etc.)

    4.8
  • Provider included you in decisions

    4.8
  • Concern the care provider showed for your questions or worries

    4.9
  • Likelihood of recommending this care provider to others

    4.8
  • Jun 22, 2026

    Dr. Passaro always listens carefully and takes time to answer questions thoroughly. She never dictates what I should do, but includes me in decision-making after offering me the best information available.

  • Jun 16, 2026

    Always above and beyond

  • Jun 14, 2026

    Dr Passaro is the very best