Physician Profile
Gwendolen Chang, M.D.
Unclaimed ProfileAbout Dr. Chang
Gwendolen Chang, M.D. practices nephrology in San Leandro, CA. Gwendolen is a 2007 graduate of Stanford University School of Medicine. Gwendolen is also listed as specializing in internal medicine. According to Medicare claims data, Gwendolen cared for 1,059 Medicare patients across 2,392 services. The services billed most often include visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient', established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes. The provider's National Provider Identifier (NPI) is 1386807402.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (510) 351-9373
- Email not available
Practice Locations
13851 E 14TH ST STE 206
San Leandro, CA 94578
Conditions Commonly Evaluated or Treated
Within Nephrology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Chronic kidney disease
- High blood pressure
- Kidney failure
- Kidney stones
Acid-base disorders
- Acid in blood
Anatomical conditions
- Shrinking kidneys
- Single kidney health
Autoimmune conditions
- IgA kidney disease
- Lupus kidney disease
Blood disorders
- Anemia from kidney disease
Blood pressure
Cysts and growths
- Kidney Cyst
Diabetes complications
Dialysis complications
- Dialysis Low Blood Pressure
Electrolyte disorders
- High calcium
- High Magnesium
- High phosphorus
- Low Magnesium
- Low sodium or electrolyte imbalance
Fluid retention
- Excess fluid buildup
- Poor Circulation and Swollen Legs
Genetic disorders
- Inherited kidney disease
- Polycystic kidney disease
Hormone disorders
- Overactive parathyroid from kidney disease
Infections
- Kidney infection
Inflammatory conditions
- FSGS
- Membranous kidney disease
- Minimal change disease
Kidney damage
- Kidney damage from medications
- Kidney Scarring
Kidney failure
- Acute kidney injury
Kidney filter diseases
- C3 Glomerulopathy
Lab abnormalities
- High BUN levels
- High creatinine levels
- Low filtration rate
Metabolic disorders
Multi-organ conditions
- Heart And Kidney Failure
Structural kidney issues
- Hydronephrosis
- Vesicoureteral reflux
Symptoms
- Flank pain
Urine abnormalities
- Blood in the urine
- Kidney Disease
Urine symptoms
- Foamy Urine
- Waking Up to Pee
Vascular conditions
Vascular kidney issues
- Kidney Blood Clot
Procedures & services
Most searched procedures
- Dialysis
- Kidney transplant follow-up
Consultations
- Kidney Medication Safety Review
- Kidney specialist second opinion
Diagnostic tests
Diagnostics
- Genetic testing for kidney disease
- Kidney biopsy
Dialysis
- Continuous Dialysis in the ICU
- Overnight Dialysis
- Peritoneal Dialysis
Dialysis access
- Dialysis Access Physical Exam
- Dialysis Catheter Removal
- Dialysis Fistula Repair
- Temporary Dialysis Line Placement
Diet and nutrition
- Kidney Disease Diet Planning
Imaging
- Blood flow test for kidneys
- Fistula ultrasound
- Kidney CT Scan
- Kidney MRI
- Kidney ultrasound
Infusions
- Immune therapy for kidney inflammation
- Iron Infusion
Interventional procedures
- Kidney cyst drainage
- Renal artery stenting
Lab tests
- 24-hour urine test
- Comprehensive Metabolic Panel
- Kidney Function Blood Test
- Parathyroid hormone monitoring
- Urine protein check
- Urine sediment test
Medication management
- Active Vitamin D Therapy
- Resistant Blood Pressure Medication Adjustment
- Steroid Therapy For Kidney Inflammation
Medication therapy
- Acid reducer treatment for kidneys
- Phosphate binder therapy
- Potassium lowering treatment
- Red blood cell booster injections
- Water pill adjustment
Patient education
- Home dialysis training
Prevention
- Kidney Stone Prevention Evaluation
Procedures
- High Blood Pressure Nerve Treatment
Specialized therapies
- Extracorporeal fluid removal
- Plasmapheresis
Supportive care
- Supportive Kidney Care Without Dialysis
Surgical procedures
- Dialysis access surgery
Transplant care
- Anti-Rejection Medication Monitoring
- Kidney transplant evaluation
- Living kidney donor evaluation
Vascular access
- Belly catheter placement
- Dialysis catheter placement
- Dialysis fistula declotting
Procedures Most Often Billed to Medicare
2,392 services · 1,059 patients · 16 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Dialysis services, 4 or more physician visits per month (20 years or older) | Treatment | 90960 |
258 | More often than most peers in Nephrology |
| Hemodialysis procedure with physician evaluation | Treatment | 90935 |
98 | More often than most peers in Nephrology |
| Dialysis services, 2-3 physician visits per month (20 years or older) | Treatment | 90961 |
44 | As often as other peers in Nephrology |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
387 | More often than most peers in Nephrology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
379 | More often than most peers in Nephrology |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
358 | More often than most peers in Nephrology |
| Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | Office visit | 99490 |
203 | As often as other peers in Nephrology |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
177 | As often as other peers in Nephrology |
| Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month | Office visit | 99439 |
127 | As often as other peers in Nephrology |
| Critical care, first 30-74 minutes | Office visit | 99291 |
103 | More often than most peers in Nephrology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other kidney specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other kidney specialists in San Leandro 3
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Stanford University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2007 at Stanford University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Dialysis services, 4 or more physician visits per month (20 years or older) 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Gwendolen Chang's specialty?
Gwendolen Chang is a kidney specialist in San Leandro, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Nephrology”.
NPI registry
Where can I find Gwendolen Chang?
Gwendolen Chang is listed at 13851 E 14Th St Ste 206, San Leandro, CA 94578. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Gwendolen Chang?
The number on file is (510) 351-9373. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Gwendolen Chang's NPI number?
Gwendolen Chang's National Provider Identifier is 1386807402. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Gwendolen Chang's education?
Gwendolen Chang attended Stanford University School of Medicine, graduating in 2007. This comes from the CMS National Downloadable File.
CMS public data
How long has Gwendolen Chang been practicing?
Gwendolen Chang has 19 years experience. Calculated from a graduation year of 2007, reported in the CMS National Downloadable File.
CMS public data
What is Gwendolen Chang known for?
According to Medicare billing data, Gwendolen Chang provides treatments such as dialysis services, 4 or more physician visits per month and hemodialysis procedure with physician evaluation, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Gwendolen Chang confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Gwendolen Chang. If this is you, claiming it is free.
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