Dr. Sergey Lyass, MD

Dr. Lyass practices at Valley Presbyterian Hospital in Vannuys, California, part of Valley Presbyterian Hospital.

Dr. Lyass' NPI, 1316996911, was assigned on May 9, 2006. Dr. Lyass graduated from Russian State Medical University in 1985. Dr. Lyass holds California license A80181.

Dr. Lyass' primary practice is Valley Presbyterian Hospital, at 15107 Vanowen St, Vannuys, CA 91405 in Los Angeles County. The practice phone is (818) 782-6600.

Dr. Lyass' primary practice is Valley Presbyterian Hospital in Vannuys, California, part of Valley Presbyterian Hospital. Dr. Lyass is also affiliated with Cedars-Sinai Medical Center. Dmand AI also links Dr. Lyass to 4 more hospitals and 3 physician offices, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lyass practices, 9 sites in all. Vendor and product names are available with a free account.

Surgery is Dr. Lyass' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Lyass is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Lyass' licenses on file in 4 states: California, Nevada, Florida and Iowa.

Dmand AI lists abdominal adhesion surgery, abdominal hernia repair surgery, acute gallbladder or bile duct inflammation, appendectomy, bariatric surgery, colon removal, esophagus, stomach, or upper small intestine surgery and gallbladder removal among the conditions Dr. Lyass treats.

CMS data shows 161 Medicare services from Dr. Lyass across 6 procedure codes in 2024, for 161 Medicare patients. Medicare paid $14,099 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 161 Medicare patients who saw Dr. Lyass in 2024. The largest group is 65 to 74, with 63 patients. 75% of them have arthritis, and 75% have high blood pressure. 67% are also on Medicaid. Their average risk score is 2.03, 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. Lyass' median patient age at 50, with 55% women.

In 2024, Dr. Lyass wrote 73 Medicare Part D claims for 27 patients. 70% of them were for generic drugs. CMS names the drug for 30 of them, across 2 drugs with 11 or more claims each, at $14,555 in total drug cost. In 2023, CMS named 12 claims across 1 drug.

Dr. Lyass accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Lyass as offering telehealth. CMS counts 14 procedures of hernia repair - groin (open) by Dr. Lyass, more than 93% of the clinicians it reports for that procedure.

Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)

Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)

Prostate resection: 1 to 10 procedures (CMS shows small counts as a range)

Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 11 papers to Dr. Lyass in 2001. The most frequent topics are Postoperative Complications, Appendectomy and Appendicitis. Dr. Lyass has published most often in Surg Endosc.

CMS Open Payments shows 318 general payments to Dr. Lyass from 45 drug and device companies from 2016 to 2025. Education make up the largest share, 75% of the total. Intuitive Surgical, Inc. paid the most, $121,741.

Dmand AI lists 1 award for Dr. Lyass.

Dr. Lyass graduated from Russian State Medical University in 1985. Dr. Lyass is a member of ACS.

Dr. Lyass is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.