
Overview
David Zelechoski is a primary care provider, practicing in Internal Medicine in Lewisburg, Pennsylvania.
Dr. Zelechoski is highly rated in 20 conditions, according to our data. His clinical expertise encompasses Hypothyroidism, Obesity in Children, Glucocorticoid-Remediable Aldosteronism, and Familial Hypertension.
Dr. Zelechoski is board certified in American Board Of Internal Medicine, Internal Medicine - 1989. Dr. Zelechoski is currently accepting new patients.
Specialties
Licenses
Board Certifications
Hospital Affiliations
Languages Spoken
Gender
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- POS
- PPO
- INSURANCE PLAN
- OTHER COMMERCIAL
- EPO
- HMO
- POS
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE-MEDICAID PLAN
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- OTHER MEDICARE PART D
- PPO
- HMO
- POS
- PPO
- OTHER MEDICARE
- OTHER MEDICARE PART D
- EPO
- HMO
- PPO
- MEDICARE MAPD
- OTHER MEDICARE
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- OTHER COMMERCIAL
- OTHER MEDICARE PART D
- HMO
- POS
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- EPO
- HMO
- PPO
- HMO
- INDEMNITY
- POS
- PPO
- EPO
- POS
- PPO
- OTHER MANAGED MEDICAID
- OTHER MEDICAID
- STATE MEDICAID
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE PART D
- HMO
- MANAGED MEDICAID PLAN
- OTHER COMMERCIAL
- EPO
- HMO
- POS
- PPO
- EPO
- PPO
- MEDICARE DISCOUNT CARD
- MEDICARE PDP
- OTHER MEDICARE
- EPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE
- OTHER MEDICARE PART D
Locations
7055 Westbranch Highway, Lewisburg, PA 17837
Additional Areas of Focus
Dr. Zelechoski has provided the following conditions as areas of focus. Please note that we may not have enough data to validate their experience in some of these conditions.
The Milton S. Hershey Medical Center
Timothy Craig is a primary care provider, practicing in Internal Medicine in Hershey, Pennsylvania. Dr. Craig is highly rated in 26 conditions, according to our data. His clinical expertise encompasses Hereditary Angioedema, Angioedema, Hives, Asthma, and Hormone Replacement Therapy (HRT).
The Milton S. Hershey Medical Center
David Claxton is a primary care provider, practicing in Internal Medicine in Hershey, Pennsylvania. Dr. Claxton is highly rated in 24 conditions, according to our data. His clinical expertise encompasses Acute Myeloid Leukemia (AML), Leukemia, Childhood Acute Myeloid Leukemia, Acute Myeloblastic Leukemia without Maturation, and Bone Marrow Aspiration.
The Milton S. Hershey Medical Center
John Boehmer is a primary care provider, practicing in Internal Medicine in Hershey, Pennsylvania. Dr. Boehmer is highly rated in 13 conditions, according to our data. His clinical expertise encompasses Heart Failure, Cardiomyopathy, Dilated Cardiomyopathy (DCM), Heart Transplant, and Lung Transplant.
Frequently Asked Questions about Dr. David M. Zelechoski
How do I make an appointment with Dr. David M. Zelechoski?
You can book an appointment with Dr. David M. Zelechoski by calling their office at 570-524-4141. MediFind provides direct contact information so you can schedule visits, second opinions, or consultations without navigating third-party calendars.
Is Dr. David M. Zelechoski a top-rated expert for Hypothyroidism?
MediFind is an objective health platform that identifies experts based on real-world data. Dr. David M. Zelechoski is classified as an Distinguished expert for Hypothyroidism, meaning they are among the top experts in the country for this condition. This ranking is based on their volume of patients, published research, and peer connections.
What conditions does Dr. David M. Zelechoski specialize in?
While Dr. David M. Zelechoski is a Internal Medicine, they have specific expertise in Hypothyroidism, Obesity in Children, and Glucocorticoid-Remediable Aldosteronism. MediFind analyzes a doctor's articles and referral patterns to identify their specific areas of focus within Internal Medicine.
Does Dr. David M. Zelechoski accept my insurance?
Dr. David M. Zelechoski accepts most major insurance plans, including Aetna and Anthem BCBS. We recommend calling the office directly at 570-524-4141 to verify that your specific plan is currently accepted before your visit.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
- Distinguished
- Familial HypertensionDr. Zelechoski isDistinguished. Learn about Familial Hypertension.
- Glucocorticoid-Remediable AldosteronismDr. Zelechoski isDistinguished. Learn about Glucocorticoid-Remediable Aldosteronism.
- HypertensionDr. Zelechoski isDistinguished. Learn about Hypertension.
- HypothyroidismDr. Zelechoski isDistinguished. Learn about Hypothyroidism.
- Obesity in ChildrenDr. Zelechoski isDistinguished. Learn about Obesity in Children.
- Advanced
- AnemiaDr. Zelechoski isAdvanced. Learn about Anemia.
- Benign Paroxysmal Positional VertigoDr. Zelechoski isAdvanced. Learn about Benign Paroxysmal Positional Vertigo.
- Coronary Heart DiseaseDr. Zelechoski isAdvanced. Learn about Coronary Heart Disease.
- FaintingDr. Zelechoski isAdvanced. Learn about Fainting.
- Familial Neurocardiogenic SyncopeDr. Zelechoski isAdvanced. Learn about Familial Neurocardiogenic Syncope.
- High CholesterolDr. Zelechoski isAdvanced. Learn about High Cholesterol.
- Maturity Onset Diabetes of the YoungDr. Zelechoski isAdvanced. Learn about Maturity Onset Diabetes of the Young.
- Memory LossDr. Zelechoski isAdvanced. Learn about Memory Loss.
- Neuroendocrine TumorDr. Zelechoski isAdvanced. Learn about Neuroendocrine Tumor.
- Periodic Limb Movement DisorderDr. Zelechoski isAdvanced. Learn about Periodic Limb Movement Disorder.
- Peripheral NeuropathyDr. Zelechoski isAdvanced. Learn about Peripheral Neuropathy.
- Postmenopausal OsteoporosisDr. Zelechoski isAdvanced. Learn about Postmenopausal Osteoporosis.
- SitosterolemiaDr. Zelechoski isAdvanced. Learn about Sitosterolemia.
- Type 2 Diabetes (T2D)Dr. Zelechoski isAdvanced. Learn about Type 2 Diabetes (T2D).
- VertigoDr. Zelechoski isAdvanced. Learn about Vertigo.
- Experienced
- Acute Interstitial PneumoniaDr. Zelechoski isExperienced. Learn about Acute Interstitial Pneumonia.
- Acute Kidney FailureDr. Zelechoski isExperienced. Learn about Acute Kidney Failure.
- Acute Mountain SicknessDr. Zelechoski isExperienced. Learn about Acute Mountain Sickness.
- Adrenal Insufficiency PediatricDr. Zelechoski isExperienced. Learn about Adrenal Insufficiency Pediatric.
- Allergic RhinitisDr. Zelechoski isExperienced. Learn about Allergic Rhinitis.
- ApoplexyDr. Zelechoski isExperienced. Learn about Apoplexy.
- AsthmaDr. Zelechoski isExperienced. Learn about Asthma.
- Asthma in ChildrenDr. Zelechoski isExperienced. Learn about Asthma in Children.
- AtherosclerosisDr. Zelechoski isExperienced. Learn about Atherosclerosis.
- Athlete's FootDr. Zelechoski isExperienced. Learn about Athlete's Foot.
- Atrial TachycardiaDr. Zelechoski isExperienced. Learn about Atrial Tachycardia.
- Atrioventricular Nodal Reentrant Tachycardia (AVNRT)
- Bacterial ProstatitisDr. Zelechoski isExperienced. Learn about Bacterial Prostatitis.
- Breast InfectionDr. Zelechoski isExperienced. Learn about Breast Infection.
- BronchitisDr. Zelechoski isExperienced. Learn about Bronchitis.
- BullaeDr. Zelechoski isExperienced. Learn about Bullae.
- CellulitisDr. Zelechoski isExperienced. Learn about Cellulitis.
- Cheilitis GlandularisDr. Zelechoski isExperienced. Learn about Cheilitis Glandularis.
- Childhood Iron Deficiency AnemiaDr. Zelechoski isExperienced. Learn about Childhood Iron Deficiency Anemia.
- Chronic CoughDr. Zelechoski isExperienced. Learn about Chronic Cough.
- Chronic Kidney DiseaseDr. Zelechoski isExperienced. Learn about Chronic Kidney Disease.
- Chronic Obstructive Pulmonary Disease (COPD)Dr. Zelechoski isExperienced. Learn about Chronic Obstructive Pulmonary Disease (COPD).
- Chronic PainDr. Zelechoski isExperienced. Learn about Chronic Pain.
- CirrhosisDr. Zelechoski isExperienced. Learn about Cirrhosis.
- Congenital AfibrinogenemiaDr. Zelechoski isExperienced. Learn about Congenital Afibrinogenemia.
- CostochondritisDr. Zelechoski isExperienced. Learn about Costochondritis.
- COVID-19Dr. Zelechoski isExperienced. Learn about COVID-19.
- Deep Vein ThrombosisDr. Zelechoski isExperienced. Learn about Deep Vein Thrombosis.
- Defective Apolipoprotein B-100Dr. Zelechoski isExperienced. Learn about Defective Apolipoprotein B-100.
- DeliriumDr. Zelechoski isExperienced. Learn about Delirium.
- Diabetic NeuropathyDr. Zelechoski isExperienced. Learn about Diabetic Neuropathy.
- DiarrheaDr. Zelechoski isExperienced. Learn about Diarrhea.
- Diffuse Large B-Cell Lymphoma (DLBCL)Dr. Zelechoski isExperienced. Learn about Diffuse Large B-Cell Lymphoma (DLBCL).
- DysfibrinogenemiaDr. Zelechoski isExperienced. Learn about Dysfibrinogenemia.
- EmphysemaDr. Zelechoski isExperienced. Learn about Emphysema.
- EmpyemaDr. Zelechoski isExperienced. Learn about Empyema.
- Enlarged LiverDr. Zelechoski isExperienced. Learn about Enlarged Liver.
- Enlarged Prostate (BPH)Dr. Zelechoski isExperienced. Learn about Enlarged Prostate (BPH).
- EpilepsyDr. Zelechoski isExperienced. Learn about Epilepsy.
- Factor 10 DeficiencyDr. Zelechoski isExperienced. Learn about Factor 10 Deficiency.
- Factor 12 DeficiencyDr. Zelechoski isExperienced. Learn about Factor 12 Deficiency.
- Factor 13 DeficiencyDr. Zelechoski isExperienced. Learn about Factor 13 Deficiency.
- Factor 5 DeficiencyDr. Zelechoski isExperienced. Learn about Factor 5 Deficiency.
- Factor 7 DeficiencyDr. Zelechoski isExperienced. Learn about Factor 7 Deficiency.
- Factor V Leiden ThrombophiliaDr. Zelechoski isExperienced. Learn about Factor V Leiden Thrombophilia.
- Familial Chronic Mucocutaneous CandidiasisDr. Zelechoski isExperienced. Learn about Familial Chronic Mucocutaneous Candidiasis.
- Familial Combined HyperlipidemiaDr. Zelechoski isExperienced. Learn about Familial Combined Hyperlipidemia.
- Familial Glucocorticoid DeficiencyDr. Zelechoski isExperienced. Learn about Familial Glucocorticoid Deficiency.
- Familial HypercholesterolemiaDr. Zelechoski isExperienced. Learn about Familial Hypercholesterolemia.
- Familial HypertriglyceridemiaDr. Zelechoski isExperienced. Learn about Familial Hypertriglyceridemia.
- Familial Hypocalciuric Hypercalcemia Type 1Dr. Zelechoski isExperienced. Learn about Familial Hypocalciuric Hypercalcemia Type 1.
- Familial HypofibrinogenemiaDr. Zelechoski isExperienced. Learn about Familial Hypofibrinogenemia.
- Fibrocystic Breast DiseaseDr. Zelechoski isExperienced. Learn about Fibrocystic Breast Disease.
- FibromyalgiaDr. Zelechoski isExperienced. Learn about Fibromyalgia.
- Follicular LymphomaDr. Zelechoski isExperienced. Learn about Follicular Lymphoma.
- Frozen ShoulderDr. Zelechoski isExperienced. Learn about Frozen Shoulder.
- Gastroesophageal Reflux Disease (GERD)Dr. Zelechoski isExperienced. Learn about Gastroesophageal Reflux Disease (GERD).
- Generalized Anxiety Disorder (GAD)Dr. Zelechoski isExperienced. Learn about Generalized Anxiety Disorder (GAD).
- Gitelman SyndromeDr. Zelechoski isExperienced. Learn about Gitelman Syndrome.
- Glucocorticoid ResistanceDr. Zelechoski isExperienced. Learn about Glucocorticoid Resistance.
- GoutDr. Zelechoski isExperienced. Learn about Gout.
- Grass AllergyDr. Zelechoski isExperienced. Learn about Grass Allergy.
- Graves DiseaseDr. Zelechoski isExperienced. Learn about Graves Disease.
- Hairy Cell Leukemia (HCL)Dr. Zelechoski isExperienced. Learn about Hairy Cell Leukemia (HCL).
- Hashimoto ThyroiditisDr. Zelechoski isExperienced. Learn about Hashimoto Thyroiditis.
- HeadacheDr. Zelechoski isExperienced. Learn about Headache.
- Heart AttackDr. Zelechoski isExperienced. Learn about Heart Attack.
- Heart FailureDr. Zelechoski isExperienced. Learn about Heart Failure.
- Heart Failure with Preserved Ejection Fraction (HFpEF)
- Heterozygous Familial Hypercholesterolemia (HeFH)
- HiccupsDr. Zelechoski isExperienced. Learn about Hiccups.
- High Molecular Weight Kininogen DeficiencyDr. Zelechoski isExperienced. Learn about High Molecular Weight Kininogen Deficiency.
- Homocystinuria due to MTHFR DeficiencyDr. Zelechoski isExperienced. Learn about Homocystinuria due to MTHFR Deficiency.
- Homozygous Familial Hypercholesterolemia (HoFH)Dr. Zelechoski isExperienced. Learn about Homozygous Familial Hypercholesterolemia (HoFH).
- HypercalcemiaDr. Zelechoski isExperienced. Learn about Hypercalcemia.
- HyperhidrosisDr. Zelechoski isExperienced. Learn about Hyperhidrosis.
- Hyperlipoproteinemia Type 4Dr. Zelechoski isExperienced. Learn about Hyperlipoproteinemia Type 4.
- HyperthyroidismDr. Zelechoski isExperienced. Learn about Hyperthyroidism.
- HypoaldosteronismDr. Zelechoski isExperienced. Learn about Hypoaldosteronism.
- Idiopathic EdemaDr. Zelechoski isExperienced. Learn about Idiopathic Edema.
- Idiopathic HypercalciuriaDr. Zelechoski isExperienced. Learn about Idiopathic Hypercalciuria.
- Inappropriate Sinus Tachycardia (IST)Dr. Zelechoski isExperienced. Learn about Inappropriate Sinus Tachycardia (IST).
- Infant HyperglycemiaDr. Zelechoski isExperienced. Learn about Infant Hyperglycemia.
- InsomniaDr. Zelechoski isExperienced. Learn about Insomnia.
- Interstitial Lung DiseaseDr. Zelechoski isExperienced. Learn about Interstitial Lung Disease.
- IntertrigoDr. Zelechoski isExperienced. Learn about Intertrigo.
- Iron Deficiency AnemiaDr. Zelechoski isExperienced. Learn about Iron Deficiency Anemia.
- Large-Cell Immunoblastic LymphomaDr. Zelechoski isExperienced. Learn about Large-Cell Immunoblastic Lymphoma.
- Low Blood PressureDr. Zelechoski isExperienced. Learn about Low Blood Pressure.
- Low Blood SugarDr. Zelechoski isExperienced. Learn about Low Blood Sugar.
- Low Potassium LevelDr. Zelechoski isExperienced. Learn about Low Potassium Level.
- Low Sodium LevelDr. Zelechoski isExperienced. Learn about Low Sodium Level.
- Lung MetastasesDr. Zelechoski isExperienced. Learn about Lung Metastases.
- Lyme DiseaseDr. Zelechoski isExperienced. Learn about Lyme Disease.
- MalnutritionDr. Zelechoski isExperienced. Learn about Malnutrition.
- MigraineDr. Zelechoski isExperienced. Learn about Migraine.
- Migraine with Brainstem AuraDr. Zelechoski isExperienced. Learn about Migraine with Brainstem Aura.
- Milk-Alkali SyndromeDr. Zelechoski isExperienced. Learn about Milk-Alkali Syndrome.
- Morning SicknessDr. Zelechoski isExperienced. Learn about Morning Sickness.
- Movement DisordersDr. Zelechoski isExperienced. Learn about Movement Disorders.
- Multisystem Inflammatory Syndrome in Children (MIS-C)
- Muscle SpasmsDr. Zelechoski isExperienced. Learn about Muscle Spasms.
- Myelodysplastic Syndrome (MDS)Dr. Zelechoski isExperienced. Learn about Myelodysplastic Syndrome (MDS).
- Myeloproliferative Neoplasms (MPN)Dr. Zelechoski isExperienced. Learn about Myeloproliferative Neoplasms (MPN).
- Nasal FlaringDr. Zelechoski isExperienced. Learn about Nasal Flaring.
- NecrosisDr. Zelechoski isExperienced. Learn about Necrosis.
- Nonbacterial ProstatitisDr. Zelechoski isExperienced. Learn about Nonbacterial Prostatitis.
- ObesityDr. Zelechoski isExperienced. Learn about Obesity.
- Ogilvie SyndromeDr. Zelechoski isExperienced. Learn about Ogilvie Syndrome.
- OpisthotonosDr. Zelechoski isExperienced. Learn about Opisthotonos.
- Orthostatic HypotensionDr. Zelechoski isExperienced. Learn about Orthostatic Hypotension.
- OsteoarthritisDr. Zelechoski isExperienced. Learn about Osteoarthritis.
- OsteoporosisDr. Zelechoski isExperienced. Learn about Osteoporosis.
- OtitisDr. Zelechoski isExperienced. Learn about Otitis.
- Painful SwallowingDr. Zelechoski isExperienced. Learn about Painful Swallowing.
- ParainfluenzaDr. Zelechoski isExperienced. Learn about Parainfluenza.
- Parainfluenza Virus Type 3Dr. Zelechoski isExperienced. Learn about Parainfluenza Virus Type 3.
- Parkinson's DiseaseDr. Zelechoski isExperienced. Learn about Parkinson's Disease.
- Paroxysmal Supraventricular Tachycardia (PSVT)Dr. Zelechoski isExperienced. Learn about Paroxysmal Supraventricular Tachycardia (PSVT).
- Pediatric MyocarditisDr. Zelechoski isExperienced. Learn about Pediatric Myocarditis.
- Peptic UlcerDr. Zelechoski isExperienced. Learn about Peptic Ulcer.
- PericarditisDr. Zelechoski isExperienced. Learn about Pericarditis.
- Peripheral Artery DiseaseDr. Zelechoski isExperienced. Learn about Peripheral Artery Disease.
- PneumoniaDr. Zelechoski isExperienced. Learn about Pneumonia.
- Polymyalgia RheumaticaDr. Zelechoski isExperienced. Learn about Polymyalgia Rheumatica.
- Prothrombin DeficiencyDr. Zelechoski isExperienced. Learn about Prothrombin Deficiency.
- PsoriasisDr. Zelechoski isExperienced. Learn about Psoriasis.
- Pulmonary EdemaDr. Zelechoski isExperienced. Learn about Pulmonary Edema.
- Pulmonary EmbolismDr. Zelechoski isExperienced. Learn about Pulmonary Embolism.
- Restless Legs SyndromeDr. Zelechoski isExperienced. Learn about Restless Legs Syndrome.
- ReticuloendotheliosisDr. Zelechoski isExperienced. Learn about Reticuloendotheliosis.
- Rhizomelic PseudopolyarthritisDr. Zelechoski isExperienced. Learn about Rhizomelic Pseudopolyarthritis.
- RingwormDr. Zelechoski isExperienced. Learn about Ringworm.
- Sacroiliac Joint DiseaseDr. Zelechoski isExperienced. Learn about Sacroiliac Joint Disease.
- Saddle Pulmonary EmbolismDr. Zelechoski isExperienced. Learn about Saddle Pulmonary Embolism.
- SciaticaDr. Zelechoski isExperienced. Learn about Sciatica.
- ScoliosisDr. Zelechoski isExperienced. Learn about Scoliosis.
- Seasonal Affective Disorder (SAD)Dr. Zelechoski isExperienced. Learn about Seasonal Affective Disorder (SAD).
- SepsisDr. Zelechoski isExperienced. Learn about Sepsis.
- Short Bowel SyndromeDr. Zelechoski isExperienced. Learn about Short Bowel Syndrome.
- SinusitisDr. Zelechoski isExperienced. Learn about Sinusitis.
- Small Bowel Bacterial OvergrowthDr. Zelechoski isExperienced. Learn about Small Bowel Bacterial Overgrowth.
- StrokeDr. Zelechoski isExperienced. Learn about Stroke.
- Subacute Combined DegenerationDr. Zelechoski isExperienced. Learn about Subacute Combined Degeneration.
- Swallowing DifficultyDr. Zelechoski isExperienced. Learn about Swallowing Difficulty.
- TenosynovitisDr. Zelechoski isExperienced. Learn about Tenosynovitis.
- Tension HeadacheDr. Zelechoski isExperienced. Learn about Tension Headache.
- ThrushDr. Zelechoski isExperienced. Learn about Thrush.
- Thyroid StormDr. Zelechoski isExperienced. Learn about Thyroid Storm.
- Tietz SyndromeDr. Zelechoski isExperienced. Learn about Tietz Syndrome.
- TMJ DisordersDr. Zelechoski isExperienced. Learn about TMJ Disorders.
- TracheitisDr. Zelechoski isExperienced. Learn about Tracheitis.
- Transient Ischemic Attack (TIA)Dr. Zelechoski isExperienced. Learn about Transient Ischemic Attack (TIA).
- Trichohepatoenteric SyndromeDr. Zelechoski isExperienced. Learn about Trichohepatoenteric Syndrome.
- Triple A SyndromeDr. Zelechoski isExperienced. Learn about Triple A Syndrome.
- Type 1 Diabetes (T1D)Dr. Zelechoski isExperienced. Learn about Type 1 Diabetes (T1D).
- Ulcerative ColitisDr. Zelechoski isExperienced. Learn about Ulcerative Colitis.
- Urinary Tract Infection (UTI)Dr. Zelechoski isExperienced. Learn about Urinary Tract Infection (UTI).
- Urinary Tract Infection in ChildrenDr. Zelechoski isExperienced. Learn about Urinary Tract Infection in Children.
- Varicose VeinsDr. Zelechoski isExperienced. Learn about Varicose Veins.
- Ventricular TachycardiaDr. Zelechoski isExperienced. Learn about Ventricular Tachycardia.
- Vitamin D DeficiencyDr. Zelechoski isExperienced. Learn about Vitamin D Deficiency.
- XanthomaDr. Zelechoski isExperienced. Learn about Xanthoma.