Eric Chak, M.D.
Gastroenterology Internal Medicine
Eric Chak is a Gastroenterology Internal Medicine specialist based in Davis, CA with over 17 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Also practices: INTERNAL MEDICINE
Eric Chak, M.D. has been part of the Davis medical community since 2009 in group practice. He graduated from University of California, San Francisco School of Medicine in 2009 and has 17+ years of clinical experience. Among his Medicare patients, common conditions include high cholesterol, hypertension, and arthritis (per CMS data).
At a glance
- Prescribes opioids less than 24% of reporting doctors in California
- Virtual visits available — no app or travel required
Older · 444dNPPES updated 2025-03-05 · verify NPI on CMS · Verify license at Medical Board of California
How Does This Doctor Compare?
Based on Medicare data, this doctor prescribes opioid pain medications conservatively.
Opioid Rx
↓ Lower = better4.05%
California avg: 5.2 · US avg: 5.1
✓ Higher than most doctors nationally(-1 pts)
4.05% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Generic Rx
↑ Higher = better70.9%
California avg: 83.3 · US avg: 82.8
⚠ Lower than most doctors nationally(-11.9 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
313
Unique beneficiaries
Standard volumePrescription Recipients
205
Patients prescribed
Prescriptions Written
667
Total claims
Total Medicare drug cost: $681k
Percentile rankings compared against 9,360 reporting peers in California.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages High Cholesterol, Hypertension, and Arthritis.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↓ Fewer patients than average (-1%) — less common here
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-2%) — less common here
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-6%) — less common here
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↑ More patients than average (+6%) — a focus area for this doctor
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↓ Fewer patients than average (-2%) — less common here
Conditions affecting emotional state, including depression and bipolar disorder
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-8%) — less common here
A mood disorder causing persistent sadness and loss of interest in activities
US avg: 31.8%↓ Fewer patients than average (-8%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$20 received from industry
1 transaction reported in 2024 ·Low tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Eric Chak's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 2009
University of California, San Francisco School of Medicine
Board certified · Mar 4, 2025
Self-reported via NPPES
17 years in practice
Experienced
Gastroenterologists diagnose and treat digestive system disorders including GERD, irritable bowel syndrome (IBS), inflammatory bowel disease (Crohn's, ulcerative colitis), liver disease, pancreatitis, and colon polyps. They perform endoscopies and colonoscopies.
Taxonomy: 207RG0100X
Education & Training
University of California, San Francisco School of Medicine (Class of 2009)
Mailing address
Po Box 255228, Sacramento, CA 95865-5228
Differs from practice location
Primary hospital affiliation: Acute Care Hospitals
CMS Certification Number: 190145
View hospital on Medicare Care CompareVirtual Internal Medicine Care With Eric Chak
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Eric Chak for cholesterol management, blood pressure monitoring, arthritis follow-ups — no travel to Davis required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Eric Chak
Dr. Chak is listed as active in the NPI registry with telehealth listed in Davis, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (530) 747-0389.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Eric Chak
Practice Location
2068 John Jones Rd, Davis, CA 95616-9711
Mailing Address
Po Box 255228, Sacramento, CA 95865-5228
This is a provider directory. Contact the office directly to schedule appointments.
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