Jacqueline Jonklaas, MD| MedStar Health
Jacqueline Jonklaas

Jacqueline Jonklaas, MD
Provider accepts MedStar Select insurance

4.9 out of 5 (506 reviews)

Specialties:

Languages:

(877) 485-1479

Clinical areas of focus

  • Adrenal Gland Disorders (E.G. CUSHING'S SYNDROME, PHEOCHROMOCYTOMA)
  • Adrenal Venous Sampling
  • Cushing Syndrome
  • Enterectomy
  • Ganglion Cyst Excision
  • Hashimoto Thyroiditis
  • Hormone Replacement Therapy
  • Hyperparathyroidism
  • Thyroid Biopsy
  • Thyroid Cancer
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Conditions and procedures

Conditions I treat

  • Abnormal Function Study Results
  • Acquired Absence Of Organs
  • Adrenal Crisis
  • Adrenal Gland Disorder
  • Adrenal Gland Disorders (E.G. CUSHING'S SYNDROME, PHEOCHROMOCYTOMA)
  • Adrenal Mass
  • Adrenal Tumor
  • Bone Density Disorder
  • Bone Disorders
  • Breast Disorders
  • Cardiometabolic Disorders
  • Congenital Adrenal Hyperplasia
  • Cushing Syndrome
  • Diabetes In Pregnancy
  • Disorders Of Lipoprotein Metabolism And Lipidemias
  • Disorders Of Mineral Metabolism
  • Disorders Of Pancreatic Internal Secretion
  • Disorders Of Pituitary Gland
  • Disorders Of Renal Tubular Function
  • Disorders Of Thyroid
  • Endocrine Hypertension
  • Family History Of Malignant Neoplasm
  • Gallbladder Disease
  • Grave's Disease
  • Hashimoto Thyroiditis
  • Hyperaldosteronism
  • Hyperfunction Of Pituitary Gland
  • Hyperparathyroidism
  • Hypoparathyroidism
  • Long Term Drug Therapy
  • Male Hypogonadism
  • Malignant Neoplasm Of Endocrine Glands
  • Malignant Neoplasm Of Lymph Nodes
  • Malignant Neuroendocrine Tumors
  • Multiple Endocrine Neoplasia
  • Multiple Myeloma Of The Spine
  • Nonscarring Hair Loss
  • Nontoxic Goiter
  • Obesity
  • Orbit Disorders
  • Osteoporosis
  • Ovarian Dysfunction
  • Parathyroid Cancer
  • Personal History Of Medical Treatment
  • Pituitary Cancer
  • Polycystic Ovary Syndrome
  • Polyglandular Dysfunction
  • Postprocedural Complications
  • Presence Of Functional Implants
  • Primary Hyperparathyroidism
  • Subclinical Hypothyroidism
  • Tertiary Hyperparathyroidism
  • Testicular Dysfunction
  • Thyroid Cancer
  • Thyroid Goiter
  • Thyrotoxic Crisis
  • Type 2 Diabetes Mellitus
  • Ureteral Cancer
  • Vitamin Deficiency
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Procedures I perform

  • Addison's Disease Treatment
  • Adrenal Hormone Regulation
  • Adrenal Insufficiency Treatment
  • Adrenal Tumor Treatment
  • Adrenal Venous Sampling
  • Computerized Tomography (CT) Scan
  • Continuous Glucose Monitoring System
  • Cushing Syndrome Management
  • Cushing's Syndrome Treatment
  • Diabetes Management
  • Enterectomy
  • Fallopian Tube Removal
  • Fine-Needle Aspiration Of Thyroid Nodule
  • Ganglion Cyst Excision
  • Glucose Control Management
  • Goiter Management
  • Grave's Disease Treatment
  • Growth Hormone Stimulation Test
  • Hashimoto Thyroiditis Management
  • Hormone Replacement Therapy
  • Hyperthyroidism Treatment
  • Lobectomy
  • Lymphoma Diagnosis
  • Parathyroid Tumor Surgery
  • Pheochromocytoma Treatment
  • Pioglitazone Therapy
  • Pituitary Apoplexy Treatment
  • Pituitary Disorder Treatment
  • Pituitary Tumor Surgery
  • Testicular Ultrasound
  • Thyroid Biopsy
  • Thyroid Cancer Treatment
  • Thyroid Fine-Needle Aspiration Biopsy
  • Thyroid Nodule Treatment
  • Thyroid Storm Treatment
  • Thyroidectomy
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Awards

  • Washingtonian Top Doc 2025

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

    5
  • Care provider’s discussion of any proposed treatment (options, risks, benefits, etc.)

    4.9
  • Provider included you in decisions

    4.9
  • Concern the care provider showed for your questions or worries

    4.9
  • Likelihood of recommending this care provider to others

    4.9
  • Dec 20, 2025

    Doctor Jonklaas Is excellent patient doctor give the time but her availability is very limited due to her excellency in her job she respond in time on the portal

  • Dec 9, 2025

    Dr. Jonklaas is fantastic, which is why I've been relying on her for more than 25 years.

  • Oct 15, 2025

    Dr. Jonklaas is the very best at what she does and it shows. I wouldn't see anyone else.