Dr. Larry K. Siu, MD

Dr. Siu practices at Morristown Medical Center in Morristown, New Jersey, part of Atlantic Health System.

Dr. Siu's NPI, 1972765675, was assigned on June 25, 2008. Dr. Siu holds New Jersey license 25MA09639900.

Dr. Siu's primary practice is Morristown Medical Center, at 100 Madison Ave, Morristown, NJ 07962 in Morris County. The practice phone is (973) 971-5450.

Dr. Siu's primary practice is Morristown Medical Center in Morristown, New Jersey, part of Atlantic Health System. Dr. Siu is also affiliated with Overlook Medical Center. The medical group on file is RWJBarnabas Health Medical Group. Dmand AI also links Dr. Siu to 3 more hospitals, 2 group practices and clinics, 2 medical groups and 1 ambulatory surgery center, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Siu practices, 8 sites in all. Vendor and product names are available with a free account.

Gastroenterology is Dr. Siu's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Siu's licenses on file in 2 states: New Jersey and Rhode Island.

CMS data shows 1,813 Medicare services from Dr. Siu across 23 procedure codes in 2024, for 925 Medicare patients. Medicare paid $196,026 for them.

CMS counts 925 Medicare patients who saw Dr. Siu in 2024. The largest group is 65 to 74, with 418 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 9% are also on Medicaid. Their average risk score is 1.56, 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. Siu's median patient age at 61, with 54% women.

In 2024, Dr. Siu wrote 1,212 Medicare Part D claims for 368 patients. 59% of them were for generic drugs. CMS names the drug for 957 of them, across 33 drugs with 11 or more claims each, at $1,293,437 in total drug cost. In 2023, CMS named 710 claims across 24 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 99 out of 100 for Dr. Siu for performance year 2024, reported through an alternative payment model (APM). Dr. Siu accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Siu as offering telehealth. CMS counts 257 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Siu, more than 94% of the clinicians it reports for that procedure.

Dmand AI links 1 paper to Dr. Siu. Dr. Siu's most frequent co-authors are Evan B. Grossman, MD, Rajesh Ramachandran, MD and Francesco M. Serafini, MD.

CMS Open Payments shows 960 general payments to Dr. Siu from 53 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Abbvie Inc. paid the most, $3,494.