Dr. Hai-Wen Ma, MD

Dr. Ma practices at Mount Sinai South Nassau in Oceanside, New York, part of Mount Sinai Health System.

Dr. Ma's NPI, 1952344038, was assigned on June 14, 2006. Dr. Ma holds New York license 218259.

Dr. Ma's primary practice is Mount Sinai South Nassau, at One Healthy Way, Oceanside, NY 11572 in Nassau County. The practice phone is (516) 632-3000. Dr. Ma also practices at South Nassau Communities Hospital, 1 Healthy Way, Oceanside, NY 11572.

Dr. Ma's primary practice is Mount Sinai South Nassau in Oceanside, New York, part of Mount Sinai Health System. The medical group on file is Mount Sinai South Nassau.

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

Internal medicine is Dr. Ma's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ma is licensed in New York.

CMS data shows 184 Medicare services from Dr. Ma across 3 procedure codes in 2023. Medicare paid $18,576 for them. Every service was in a facility, such as a hospital, rather than an office.

Across all payers, Dmand AI patient panel data puts Dr. Ma's median patient age at 69, with 56% women.

In 2022, Dr. Ma wrote 37 Medicare Part D claims. Every claim was for a generic drug. They cover 3 drugs, with $181 in total drug cost. In 2021, CMS named 44 claims across 3 drugs.

Dr. Ma accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

CMS Open Payments shows 23 general payments to Dr. Ma from 8 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $213.