Dr. Eric W. Chak, MD

Dr. Chak practices at UC Davis Medical Center in Sacramento, California, part of University of California Health.

Dr. Chak's NPI, 1225271331, was assigned on April 20, 2009. Dr. Chak graduated from UCSF School of Medicine in 2009. Dr. Chak holds California license A114205.

Dr. Chak's primary practice is UC Davis Medical Center, at 2315 Stockton Boulevard, Sacramento, CA 95817 in Sacramento County. The practice phone is (916) 734-2011.

Dr. Chak's primary practice is UC Davis Medical Center in Sacramento, California, part of University of California Health. Dr. Chak is also affiliated with Sutter Medical Center, Sacramento. The medical group on file is SGMF Radiology. Dmand AI also links Dr. Chak to 1 more hospital and 1 group practice or clinic, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chak practices, 4 sites in all. Vendor and product names are available with a free account.

Gastroenterology is Dr. Chak's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Chak is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Chak is licensed in California.

Dmand AI lists acid reflux, cirrhosis of the liver, colonoscopy, fatty liver, gastroenteritis, hemorrhoids, hepatitis c and upper GI endoscopy among the conditions Dr. Chak treats.

CMS data shows 487 Medicare services from Dr. Chak across 11 procedure codes in 2024, for 233 Medicare patients. Medicare paid $22,283 for them.

CMS counts 233 Medicare patients who saw Dr. Chak in 2024. The largest group is 65 to 74, with 120 patients. 67% of them have high cholesterol, and 65% have high blood pressure. 31% are also on Medicaid. Their average risk score is 1.84, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Chak's median patient age at 57, with 56% women.

In 2024, Dr. Chak wrote 569 Medicare Part D claims for 196 patients. 68% of them were for generic drugs. CMS names the drug for 420 of them, across 15 drugs with 11 or more claims each, at $281,636 in total drug cost. In 2023, CMS named 532 claims across 17 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 90 out of 100 for Dr. Chak for performance year 2024, reported as part of a group. Dr. Chak accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chak as offering telehealth. CMS counts 59 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Chak, more than 66% of the clinicians it reports for that procedure.

Dmand AI links 29 papers to Dr. Chak, published from 2010 to 2024. 2018 was the busiest year, with 4. The most frequent topics are Hepatitis B, Chronic, Asian and Healthcare Disparities. Dr. Chak has published most often in Case Rep Gastroenterol. Dr. Chak's most frequent co-authors are Christopher L. Bowlus, MD, Gyorgy Baffy, MD and Tarun Rustagi, MD.

Dmand AI links Dr. Chak to 3 clinical trials. Conditions studied include Hepatitis B, Chronic, Hepadnaviridae Infections and Pneumonia, Bacterial. University of California, Davis sponsors the most, 2.

CMS Open Payments shows 22 general payments to Dr. Chak from 8 drug and device companies from 2017 to 2025. Consulting fees make up the largest share, 76% of the total. Gilead Sciences, Inc. paid the most, $9,430.

Dr. Chak graduated from UCSF School of Medicine in 2009.

Dr. Chak is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.