Marnie Gissel Aguasvivas Bello, MD| Endocrinology Diabetes and Metabolism | MedStar Health
Clinical areas of focus
- Diabetes Mellitus Type 2
- Hyperthyroidism
- Osteoporosis
- Parathyroid Disorders
- Pituitary Disorders
- Subclinical Hypothyroidism
- Thyroid Cancer
- Thyroid Nodules
Conditions and procedures
Conditions I treat
- Acromegaly
- Adrenal Crisis
- Adrenal Gland Disorder
- Adrenal Gland Disorders (E.G. CUSHING'S SYNDROME, PHEOCHROMOCYTOMA)
- Adrenal Mass
- Adrenal Tumor
- Adrenogenital Disorders
- Adult Osteomalacia
- Benign Neoplasm Of Adrenal Gland
- Benign Thyroid Nodules
- Bone Density Disorder
- Bone Disorders
- Breast Disorders
- Cardiometabolic Disorders
- Congenital Adrenal Hyperplasia
- Cushing Syndrome
- Diabetes In Pregnancy
- Diabetes Insipidus
- Diabetes Mellitus Due To Underlying Condition
- Diabetes Mellitus Type 2
- Diabetic Ketoacidosis
- Diabetic Nephropathy
- Diabetic Neuropathy
- Diabetic Retinopathy
- Disorders Of Lipoprotein Metabolism And Lipidemias
- Disorders Of Mineral Metabolism
- Disorders Of Pituitary Gland
- Disorders Of Thyroid
- Drug Or Chemical Induced Diabetes Mellitus
- Endocrine Disorders
- Endocrine Hypertension
- Family History Of Malignant Neoplasm
- Gastrinoma
- Gestational Diabetes
- Grave's Disease
- Grave's Disease
- Growth Hormone Deficiency
- Hashimoto Thyroiditis
- High Blood Sugar
- High Cholesterol
- Hirsutism
- Hyperaldosteronism
- Hyperalimentation
- Hyperfunction Of Pituitary Gland
- Hyperglycemia
- Hyperparathyroidism
- Hyperprolactinemia
- Hyperthyroidism
- Hypertrichosis
- Hypocalcemia
- Hypoglycemia
- Hypoparathyroidism
- Insulin Resistance
- Klinefelter Syndrome
- Lipid Disorders
- Long Term Drug Therapy
- Low Testosterone Levels
- Male Hypogonadism
- Malignant Neoplasm Of Endocrine Glands
- Malignant Neoplasm Of Lymph Nodes
- Malignant Neuroendocrine Tumors
- Malnutrition
- Metabolic Syndrome
- Multiple Endocrine Neoplasia
- Multiple Myeloma Of The Spine
- Musculoskeletal System Complications
- Nontoxic Goiter
- Obesity
- Osteochondropathies
- Osteopenia
- Osteoporosis
- Ovarian Cysts
- Ovarian Dysfunction
- Parathyroid Adenoma
- Parathyroid Cancer
- Parathyroid Disorders
- Personal History Of Medical Treatment
- Pituitary Adenoma
- Pituitary Apoplexy
- Pituitary Cancer
- Pituitary Disorders
- Plasma Cell Neoplasms
- Poisoning
- Polycystic Ovary Syndrome
- Polyglandular Dysfunction
- Postmenopausal Osteoporosis
- Postprocedural Complications
- Prediabetes
- Presence Of Functional Implants
- Primary Hyperparathyroidism
- Proteinuria
- Rib And Sternum Fracture
- Sex Chromosome Abnormalities, Male Phenotype
- Subclinical Hypothyroidism
- Testicular Dysfunction
- Thyroid Cancer
- Thyroid Goiter
- Thyroid Nodules
- Thyroid Storm
- Thyrotoxic Crisis
- Toxic Goiter
- Turner Syndrome
- Type 2 Diabetes
- Type 2 Diabetes In Children
- Type 2 Diabetes Mellitus
- Ureteral Cancer
- Vitamin D Deficiency Rickets
- Vitamin Deficiency
- Weight Loss
- West Syndrome
Procedures I perform
- Acromegaly Treatment
- Adrenal Cancer Treatment
- Adrenal Crisis Treatment
- Adrenal Disease Treatment
- Adrenal Disorder Treatment
- Adrenal Gland Cancer Management
- Adrenal Hormone Level Testing
- Adrenal Hormone Management
- Adrenal Hormone Regulation
- Adrenal Insufficiency Treatment
- Adrenal Surgery
- Adrenal Tumor Treatment
- Alcohol Abuse Counseling
- Aldosteronoma Management
- Allergy Emergency Preparedness
- Alternative Medicine
- Anemia Management
- Automated Insulin Delivery
- Bariatric Nutrition Counseling
- Bariatric Surgery Counseling
- Bariatric Surgery Nutrition Counseling
- Bariatric Surgery Reversal
- Binge Eating Disorder Treatment
- Biometric Screenings
- Blood Glucose Correction For High Readings
- Blood Pressure Check
- Blood Pressure Goal Setting
- Blood Pressure Monitoring
- Body Mass Index (BMI) Evaluation
- Cancer Genetic Testing
- Carbohydrate Counting For Meal Planning
- Cardiovascular Disease Prevention
- Cardiovascular Health Nutrition Counseling
- Cardiovascular Personalized Medicine
- Cervical Lymph Node Dissection
- Chronic Fatigue Syndrome Nutrition Counseling
- Clinical Trials
- Community Health Education
- Computerized Tomography (CT) Scan
- Continuous Glucose Monitoring System
- Continuous Glucose Monitoring System Training
- Coronary Artery Disease Nutrition Counseling
- Cushing Syndrome Management
- Cushing Syndrome Treatment
- Cushing's Syndrome Treatment
- Cystic Fibrosis Nutrition Counseling
- Depression Nutrition Counseling
- Diabetes Complications Prevention
- Diabetes Foot Care
- Diabetes Management
- Diabetes Self-Care Planning
- Diabetes Self-Efficacy Assessment
- Diabetes Self-Management
- Diabetes Support Group Facilitation
- Diabetes Treatment
- Diabetic Eye Exam
- Diabetic Foot Exam
- Diabetic Ketoacidosis Risk Assessment
- Diabetic Ketoacidosis Treatment
- Diabetic Retinopathy Nutrition Counseling
- Dietary Assessment
- Dietary Management Of Cushing Syndrome
- Dietary Supplement Counseling
- Dietary Treatment Of Goiter
- Eating For Optimal Energy
- Elder Abuse Screening And Support
- Electrolyte Management
- Endocrine Disorder Treatment
- Endocrine Disorders Treatment
- Endocrine Tumor Treatment
- Endometriosis Nutrition Counseling
- End-Stage Renal Disease Nutrition Counseling
- Endurance Sports Nutrition
- Endurance Sports Nutrition Counseling
- Epigenetic Nutrition Counseling
- Eye Disease Treatment
- Fallopian Tube Removal
- Familial Medullary Thyroid Carcinoma (FMTC) Treatment
- Fatigue Management
- Fine-Needle Aspiration Of Thyroid Nodule
- Flexibility And Mobility Nutrition Counseling
- Fluid And Electrolyte Management
- Foot Sprain Treatment
- Ganglion Cyst Excision
- Gastric Surgery
- Geriatric Nutrition Counseling
- Geriatric Wound Care Nutrition Counseling
- Gestational Diabetes Management
- Gland Disorder Treatment
- Gland Dysfunction Treatment
- Glaucoma Nutrition Counseling
- Glucometer Use
- Glucose Control Management
- Glycemic Variability Assessment
- Goiter Treatment
- Grave's Disease Treatment
- Grave's Orbitopathy Treatment
- Grocery Shopping Assistance
- Growth Hormone Follow-Up
- Growth Hormone Level Monitoring
- Growth Hormone Screening
- Gut Health Nutrition Counseling
- Gynecological Cancer Screening
- Hashimoto's Thyroiditis Treatment
- Health Leadership
- Healthy Weight Loss Guidance
- Heart Disease Prevention
- Heart Healthy Lifestyle Counseling
- High Cholesterol Management
- High Cholesterol Nutrition Counseling
- Hormone Balancing Nutrition Counseling
- Hormone Imbalance Treatment
- Hormone Replacement Therapy
- Hypercalcemia Nutrition Management
- Hypercalcemia Treatment
- Hyperglycemic Hyperosmolar Nonketotic Syndrome (HHNS) Treatment
- Hyperparathyroidism Dietary Treatment
- Hyperthyroidism Nutrition Counseling
- Hyperthyroidism Treatment
- Hypoparathyroidism Treatment
- Hypothyroidism Diet Planning
- Hypothyroidism Treatment
- Insulin Dose Titration
- Insulin Pen Training
- Insulin Resistance Nutrition Counseling
- Insulin Resistance Treatment
- Insulin Syringe Use
- Insulin Tolerance Test
- Internal Radiation Therapy
- Islet Xenotransplant
- Ketogenic Diet Planning
- Kidney Disease Treatment
- Kidney Transplant Education
- Kinesiology Analysis
- Lifestyle Modification
- Lipid Profile
- Lobectomy
- Meal Planning
- Menopause Nutrition Counseling
- Mental Health Support During Pregnancy
- Mental Wellness Programs
- Mind-Body Nutrition Counseling
- Mineral Deficiency Treatment
- Motivational Interviewing
- Movement Screening
- Multiple Endocrine Neoplasia (MEN) Testing
- Neuroendocrine Disorder Treatment
- Neuroendocrine Tumor Treatment
- Nutrient Deficiency Screening
- Nutrient Supplementation Planning
- Nutrition Counseling
- Nutrition Science Education
- Obesity Treatment
- One-On-One Diabetes Education
- Oral Medication Therapy For Diabetes
- Osteoporosis Nutrition Counseling
- Osteoporosis Prevention Treatment
- Pancreatic Disease Management
- Paraganglioma Treatment
- Parathyroid Biopsy
- Parathyroid Cancer Treatment
- Parathyroid Disease Treatment
- Parathyroid Disorder Treatment
- Parathyroid Hormone Regulation
- Parathyroid Tumor Surgery
- Parathyroid Ultrasound
- Pcos Treatment
- Perimenopause Nutrition Counseling
- Personalized Meal Planning
- Pheochromocytoma Treatment
- Physical Activity Counseling
- Pioglitazone Therapy
- Pituitary Apoplexy Treatment
- Pituitary Biopsy
- Pituitary Cancer Treatment
- Pituitary Disorder Treatment
- Pituitary Disorders Nutrition Counseling
- Pituitary Gland Surgery
- Pituitary Medication Management
- Pituitary Surgery
- Pituitary Tumor Embolization
- Pituitary Tumor Surgery
- Pituitary Tumor Treatment
- Polycystic Ovary Syndrome (PCOS) Treatment
- Post-Operative Nutrition Counseling
- Pre- And Post-Bariatric Surgery Nutrition Counseling
- Pre- And Post-Chemotherapy Nutrition Counseling
- Prediabetes Management
- Pregnancy Nutrition Counseling
- Prenatal Substance Abuse Screening
- Pressure Ulcer Nutrition Counseling
- Primary Hyperparathyroidism Treatment
- Probiotic Therapy
- Prolactinoma Treatment
- Psoriasis Nutrition Counseling
- Pulmonary Exercise Testing
- Relapse Prevention
- Resting Metabolic Rate (RMR) Testing
- Secondary Hyperparathyroidism Treatment
- Skin Allergy Testing
- Skin Health Education
- Sports Nutrition Counseling
- Sports Performance Nutrition Counseling
- Strength Training Nutrition Counseling
- Stress Management For Diabetes
- Stroke Nutrition Counseling
- Surgical Recovery Nutrition Counseling
- Tertiary Hyperparathyroidism Treatment
- Testicular Ultrasound
- Thyroid Acropachy Treatment
- Thyroid Biopsy
- Thyroid Cancer Ablation
- Thyroid Cancer Chemotherapy
- Thyroid Cancer Lymph Node Dissection
- Thyroid Cancer Treatment
- Thyroid Crisis Treatment
- Thyroid Dermopathy Treatment
- Thyroid Disease Management
- Thyroid Disease Treatment
- Thyroid Health Nutrition Counseling
- Thyroid Lymphoma Treatment
- Thyroid Medication Management
- Thyroid Metastasis Treatment
- Thyroid Nodule Treatment
- Thyroid Storm Surgery
- Thyroid Storm Treatment
- Thyroidectomy
- Total Parenteral Nutrition
- Travel Safety Advice
- Vaccine Development And Policy
- Vision Loss Prevention
- Vitamin And Mineral Deficiency Treatment
- Vitamin Deficiency Treatment
- Weight Management For Healthy Weight
- Weight Measurement
- Yoga Coaching
Insurance
MedStar Health accepts most major health insurance plans. If you are uncertain as to whether your individual health insurance plan is accepted at MedStar Health, please call your insurance company.
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List of insurance plans we accept
- Aetna Student Health Insurance
- POS OA
- Great-West Healthcare POS/CIGNA
- Lasso Healthcare - Medicare Medical Savings Account
- United HealthCare Community Plan - Maryland Health Choice Program
- Erickson Advantage Plans
- MultiPlan, Inc
- Aetna Basic
- Optimum Choice
- Humana Medicare Advantage - PPO
- CIGNA SureFit (HMO)
- OA Plus
- AmeriHealth Caritas DC Healthcare Alliance
- CareFirst Blue Preferred PPO
- Aetna Advantage 5750
- CareFirst MedStar PPO
- Jai Medical Systems - Maryland Health Choice
- Mamsi Life & Health (Indem./PPO) Cardiac Global
- United Healthcare Choice
- United Healthcare Select HMO - EPO/NPP
- M.D. IPA (HMO)
- Choice POS II Open Access
- CIGNA POS/Network POS
- Kaiser Permanente Flexible Choice 3-tier POS
- Kaiser Permaenete Signature - Added Choice Cardiac Global
- CareFirst BlueCross BlueShield Advantage Core/Enhanced
- CareFirst Group Medicare Advantage prescription drug benefit (PPO)
- First Health PPO
- DC/MD SHOP QHP Small Business Plans
- Cigna True Choice Medicare (PPO)
- CareFirst EPO
- CareFirst Group Medicare Advantage
- CareFirst Community Health Plan of MD
- CareFirst MedStar Select PPO
- Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
- Select HMO/HealthFund/Health Network
- Private Health Care Systems (PPO)
- Choice Care Network/HUMANA (PPO)
- UHC Group Medicare Advantage Plans (HMO, POS, PPO)
- Optima Family Care MCO - VA Medicaid MCO
- IH-Open POS II
- United Student Resources
- HighMark
- MedStar Family Choice DC Healthcare Alliance
- CIGNA PPO
- IH-Open EPO Plus
- Aetna Managed Choice (POS)
- Aetna Traditional Choice (PPO)
- Anthem BCBS of VA HealthKeepers (POS & POS OA)
- Anthem BCBS Medi Blue SNP
- First Health PPO
- Fee-for-Service (FFS) District of Columbia, Maryland and Virginia Medicaid
- Aetna Medicare Advantage PFFS Plan
- CIGNA Connect EPO
- Sentara Health
- MedStar Family Choice DC Healthcare Alliance
- HumanaChoice Honor's plan PPO
- Aetna Managed Choice Open Access (POS)
- Coventry of Delaware HMO/PPO
- Kaiser Permanente HMO Plus and DHMO Plus Member
- Navigate
- UnitedHealthcare Individual Exchange Plans
- Aetna Open Choice (PPO)
- Healthy Blue (HMO, POS)
- United Healthcare Community Plan - VA Medicaid MCO
- Cigna TotalCare (HMO D-SNP)
- United Healthcare Navigate Cardiac Global
- Johns Hopkins Advantage MD PPO
- Aetna Quality Point of Service (POS)
- IH-PPO
- CareFirst Federal Employee Program (Std. & Basic PPO)
- Anthem BCBS Medi Blue Dual Adv
- IH-EPO Plus
- BlueChoice Open Access
- NYC Medicare Advantage Plus
- IH-Open HMO
- UnitedHealthcare Medicare Adv. Special Needs Plans
- Aetna VA Exchange
- Aetna Classic 3500
- Kaiser Permanente Flexible Choice POS Cardiac Global
- Aetna Advantage 6350PD
- MedStar Family Choice - Maryland Health Choice
- United Healthcare Choice Plus Cardiac Global
- Aetna Classic 5000PD
- CareFirst Blue Card Program
- AMERIVANTAGE/Amerigroup Community Care
- IH-Indemnity
- Cigna True Choice Plus Medicare (PPO)
- IH-Open POS Plus
- IH-Open Network Only Plus
- MD IPA (HMO) & MD IPA Preferred Cardiac Global
- Advantra Platinum (PPO)
- Options PPO Cardiac Global
- Choice POS II
- IH-Open HMO Option
- Magellan Complete Care of VA - VA Medicaid MCO
- HumanaChoice PPO
- CIGNA EPO
- Johns Hopkins Advantage MD PLUS PPO
- Aetna Elect Choice/ EPO (Aetna Health Fund)
- Blue Choice Advantage
- Kaiser Permanente Select
- Anthem Federal Employee Program Basic
- Anthem Federal Employee Program Standard
- CIGNA HMO & Network (HMO)
- OCI Direct (HMO)
- CareFirst NASCO
- Veterans Affairs Community Care Network
- Tricare Reserve Select
- Aetna Signature Administrator PPO/TPA
- CIGNA PPO Plus
- Health Services for Children with Special Needs
- M.D. IPA Preferred (POS)
- Anthem BCBS of VA Key Care POS/PPO/Indemnity
- MedStar Family Choice - Maryland Health Choice
- CareFirst BlueChoice HMO
- CIGNA Indemnity
- Police and Fire Clinic
- Medicare Direct
- IH-Network Only Plus
- Employee Health Plan
- TRICARE for Life East
- Kaiser Permanente Select - Added Choice
- Anthem BCBS Medi Blue Plus
- CareFirst Maryland Point of Service Plan
- UnitedHealthcare Individual Exchange Plans
- Johns Hopkins Advantage MD HMO
- Aetna Better Health of VA
- CIGNA HMO Open Access
- Aetna Medicare Advantage HMO & PPO Plans
- AmeriHealth Caritas DC Healthy Families
- Mamsi Life & Health (Indem./PPO)
- United Healthcare Select HMO-EPO/NPP Cardiac Global
- TRICARE East Prime
- HealthyBlue PPO
- CareFirst Administrators
- Kaiser Permanente Signature
- United Healthcare Choice Plus
- Beech Street PPO
- BCBS Out-of-State Medicare Plans (Blue Advantage)
- Geisinger Medicare Advantage
- CareFirst Blue Choice Opt Out Open Access
- Aetna Classic 5000
- Anthem BCBS of VA HealthKeepers (HMO)
- Choice Fund PPO
- UnitedHealthcare and AARP Medicare Complete Plans
- Aetna HMO
- Uniformed Services Family Health Plan
- Cigna Preferred Medicare (HMO)
- Amerigroup DC Alliance
- Mamsi Life & Health (Indem./PPO)
- Humana Gold Plus HMO
- HUMANA/Choice Care Medicare Plans (Choice, Gold Choice)
- Amerigroup DC Healthy Families
- UnitedHealthcare Medicare Advantage DSNP District of Columbia
- CareFirst Blue Choice Opt Out Plus Open Access (POS)
- Cigna Achieve Medicare (HMO C-SNP)
- Medicare FFS
- Aetna Premier 200PD
- Coventry Health Care of Virginia
- Kaiser Permanente Medicare Advantage Signature and Select
- United Medicare Private Fee-for-Service (PFFS) plans
- UHC Passport
- Kaiser Permanente Medicare Plus
- Core Essential (HMO)
- TriWest Healthcare Alliance
- CareFirst Dual Prime HMO-SNP
- CareFirst FEP Blue Focus
- IH-POS Plus
- IH-HMO
- Coventry Health Care National Network PPO
- Choice POS
- Aetna Better Health of MD
- Aetna Advantage 6350
- United Healthcare Choice Cardiac Global
- Optimum Choice Preferred (POS)
- IH-POS
- Cigna Alliance Medicare (HMO)
- Kaiser Permanente Select Cardiac Global
- Network OA
- Priority Partners - Maryland Health Choice
- Private Fee-for-Service Plans (PFFS)
- CareFirst (NCA) Indemnity
- United Healthcare Options (PPO)
- Humana Medicare Advantage - HMO Open Access
- Aetna Worker's Compensation Network
- Kaiser Maryland Medicaid MCO
- Kaiser Permanente Signature - Added Choice
- Anthem BCBS of VA HealthKeepers Plus
- TRICARE East Select
- Alterwood Advanatge HMO & DSNP Plans
- MedStar Family Choice DC Healthy Families
- CareFirst Maryland Indemnity or PPO
- WellPoint Maryland - Maryland Health Choice
- Optimum Choice & Optimum Choice Preferred (POS) Cardiac Global
- Medicare Advantage - Advantra Value (PPO)
- Fee-for-Service (FFS) District of Columbia, Maryland and Virginia Medicaid
- Maryland Physicians Care MCO
- BCBS of Michigan (BCN Advantage,Security Blue, Freedom, Medicare PLUS Blue Group PPO)
- United Healthcare Select Plus (POS)
- Aetna Elect Choice/ Open Access (POS)
Education
Board Certification: American Board of Internal Medicine, Internal Medicine
Fellowship: MedStar Union Memorial Hospital at Baltimore (2024)
Residency: Hackensack University Medical Center-GME (2020)
Medical School: Instituto Tecnologico de Santo Domingo (2013)