Alexander R. Chang
Expertise in
6
conditions

Dr. Alexander R. Chang

Nephrology
Geisinger Health System
Geisinger Medical Center - Nephrology
100 North Academy Avenue, 
Danville, PA 
Accepting New Patients
Offers Telehealth

Expertise in
6
conditions
Geisinger Health System
Geisinger Medical Center - Nephrology
100 North Academy Avenue, 
Danville, PA 
OverviewInsuranceLocationsClinical ResearchSimilar Doctors

Overview

Dr. Chang is a board-certified and fellowship-trained nephrologist. He obtained his medical degree from The Ohio State University. He completed his residency and a fellowship in nephrology at Loyola University Health System. Dr. Chang is certified by the American Board of Internal Medicine in nephrology.

Dr. Chang is highly rated in 6 conditions, according to our data. His top areas of expertise are Alport Syndrome, Chronic Kidney Disease, Polycystic Kidney Disease, Autosomal Dominant Polycystic Kidney Disease, and Kidney Transplant.

His clinical research consists of co-authoring 78 peer reviewed articles. MediFind looks at clinical research from the past 15 years.

Graduate Institution
Ohio State University College Of Medicine, 2007 - Doctor Of Medicine
Specialties
Nephrology
Licenses
Internal Medicine in IL
Board Certifications
The American Board Of Internal Medicine In Nephrology
Fellowships
Johns Hopkins Hospital, 2013
Hospital Affiliations
Geisinger Medical Center
Geisinger-Bloomsburg Hospital
Languages Spoken
English
Gender
Male

Insurance

Accepted insurance can change. Please verify directly with the provider.

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Accepted insurance plans:

Aetna
  • EPO
  • HMO
  • POS
  • PPO
Capital Blue Cross
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • OTHER MEDICARE PART D
  • PPO
Change Healthcare
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
Cigna
  • EPO
  • HMO
  • PPO
Geisinger
  • HMO
  • POS
  • PPO
Health Partners Plans
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE SNP
Highmark
  • EPO
  • HMO
  • PPO
Humana
  • HMO
  • INDEMNITY
  • POS
  • PPO
Independent Health
  • EPO
  • POS
  • PPO
Managed Medicaid
  • OTHER MANAGED MEDICAID
Medicaid
  • OTHER MEDICAID
  • STATE MEDICAID
Moda Health
  • EPO
  • PPO
PA Health and Wellness
  • HMO
  • MANAGED MEDICAID PLAN
UnitedHealthcare
  • EPO
  • HMO
  • POS
  • PPO
UPMC
  • EPO
  • PPO
Wellcare
  • EPO
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
View 11 Less Insurance Carriers -

Locations

Geisinger Medical Center - Nephrology
100 North Academy Avenue, Danville, PA 17822
Call: 800-275-6401
Other Locations
Geisinger Medical Center - Transplant
100 North Academy Avenue, Danville, PA 17822
Call: 800-275-6401

Clinical Research

Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.


78 Total Publications

Leveraging genomic biobanks to enhance genetic testing outcomes for kidney disease.
Leveraging genomic biobanks to enhance genetic testing outcomes for kidney disease.
Journal: medRxiv : the preprint server for health sciences
Published: November 26, 2025
View All 78 Publications
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Samuel F. Stea
Expertise in
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Dr. Samuel F. Stea
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Expertise in
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Dr. Samuel F. Stea
Nephrology

UPMC Nephrology

2330 Saint Mary Street West, 
Lewisburg, PA 
 (17.7 miles away)
570-326-8080
Languages Spoken:
English
See accepted insurances
Accepting New Patients
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Samuel Stea, MD, specializes in nephrology and is certified in internal medicine by the American Board of Internal Medicine. He practices in Lewisburg and at UPMC Williamsport and UPMC Lock Haven. He received his medical degree from New York Medical College, completed a  fellowship at the University of Virginia School of Medicine, and his residency at Danbury Hospital. Dr. Stea is highly rated in 18 conditions, according to our data. His top areas of expertise are Renovascular Hypertension, Nephrosclerosis, Acute Kidney Failure, and Chronic Kidney Disease.

Ion D. Bucaloiu
Expertise in
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Dr. Ion D. Bucaloiu
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Expertise in
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Dr. Ion D. Bucaloiu
Nephrology

GMC Nephrology

100 North Academy Avenue, 
Danville, PA 
 (0.1 miles away)
570-271-6393
Languages Spoken:
English, French, Romanian
See accepted insurances
Accepting New Patients
Offers Telehealth

Dr. Bucaloiu is a board-certified and fellowship-trained nephrologist specializing in hypertension. His clinical interests include hypertension, fluid and electrolytes, nephrology palliative care and acute kidney injury. His research interests include hypertension, fluid and electrolytes and acute kidney injury. Dr. Bucaloiu earned his medical degree from the Universitatea de Medicina si Farmacie Carol Davila in Romania. He then moved to the United States to complete his residency at Geisinger Medical Center. He completed a fellowship in nephrology at the same institution. Dr. Bucaloiu is certified by the American Board of Internal Medicine in nephrology. He speaks English, French and Romanian. Dr. Bucaloiu is highly rated in 6 conditions, according to our data. His top areas of expertise are Chronic Kidney Disease, End-Stage Renal Disease (ESRD), Acute Kidney Failure, and Renovascular Hypertension.

Maria C. Bermudez
Expertise in
5
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Dr. Maria C. Bermudez
Nephrology
Expertise in
5
conditions
Dr. Maria C. Bermudez
Nephrology

Geisinger Medical Center - Nephrology

100 North Academy Avenue, 
Danville, PA 
 (0.1 miles away)
800-275-6401
Languages Spoken:
English, Spanish
See accepted insurances

Dr. Bermudez is a board-certified and fellowship-trained nephrologist. Dr. Bermudez attended the Universidad CES Escuela de Medicina, where she received her medical degree, and completed her residency at Geisinger Medical Center. She completed a fellowship in nephrology and hypertension at the Albert Einstein College of Medicine of Yeshiva University, Montefiore Medical Center. Dr. Bermudez is certified by the American Board of Internal Medicine in internal medicine and nephrology. She speaks English and Spanish. Dr. Bermudez is highly rated in 5 conditions, according to our data. Her top areas of expertise are End-Stage Renal Disease (ESRD), Renovascular Hypertension, Acute Kidney Failure, Chronic Kidney Disease, and Kidney Transplant.

VIEW MORE Nephrologists

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

Find Dr. Chang's expertise for a condition
ConditionClose
    • Distinguished
    • Alport Syndrome
      Dr. Chang is
      Distinguished
      . Learn about Alport Syndrome.
      See more Alport Syndrome experts
    • Chronic Kidney Disease
      Dr. Chang is
      Distinguished
      . Learn about Chronic Kidney Disease.
      See more Chronic Kidney Disease experts
    • Advanced
    • Autosomal Dominant Polycystic Kidney Disease
      Dr. Chang is
      Advanced
      . Learn about Autosomal Dominant Polycystic Kidney Disease.
      See more Autosomal Dominant Polycystic Kidney Disease experts
    • End-Stage Renal Disease (ESRD)
      Dr. Chang is
      Advanced
      . Learn about End-Stage Renal Disease (ESRD).
      See more End-Stage Renal Disease (ESRD) experts
    • Magnesium Deficiency
      Dr. Chang is
      Advanced
      . Learn about Magnesium Deficiency.
      See more Magnesium Deficiency experts
    • Polycystic Kidney Disease
      Dr. Chang is
      Advanced
      . Learn about Polycystic Kidney Disease.
      See more Polycystic Kidney Disease experts
    • Experienced
    • Acute Kidney Failure
      Dr. Chang is
      Experienced
      . Learn about Acute Kidney Failure.
      See more Acute Kidney Failure experts
    • Acute Tubular Necrosis
      Dr. Chang is
      Experienced
      . Learn about Acute Tubular Necrosis.
      See more Acute Tubular Necrosis experts
    • Autosomal Dominant Tubulointerstitial Kidney Disease
      Dr. Chang is
      Experienced
      . Learn about Autosomal Dominant Tubulointerstitial Kidney Disease.
      See more Autosomal Dominant Tubulointerstitial Kidney Disease experts
    • Focal Segmental Glomerulosclerosis
      Dr. Chang is
      Experienced
      . Learn about Focal Segmental Glomerulosclerosis.
      See more Focal Segmental Glomerulosclerosis experts
    • Glomerulonephritis
      Dr. Chang is
      Experienced
      . Learn about Glomerulonephritis.
      See more Glomerulonephritis experts
    • High Potassium Level
      Dr. Chang is
      Experienced
      . Learn about High Potassium Level.
      See more High Potassium Level experts
    View All 17 Experienced Conditions
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