Dr. Daniel Colin Massiah, MD

Dr. Massiah practices at Mather Hospital in Port Jefferson, New York, part of Northwell Health.

Dr. Massiah's NPI, 1063485969, was assigned on February 10, 2006. Dr. Massiah graduated from Wayne State University School of Medicine in 1998. Dr. Massiah holds New York license 235602.

Dr. Massiah's primary practice is Mather Hospital, at 75 North Country Road, Port Jefferson, NY 11777 in Suffolk County. The practice phone is (631) 473-1320.

Dr. Massiah's primary practice is Mather Hospital in Port Jefferson, New York, part of Northwell Health. Dr. Massiah is also affiliated with Stony Brook University Hospital. The medical group on file is Peconic Bay Medical Group at Mattituck. Dmand AI also links Dr. Massiah to 2 more hospitals, 1 group practice or clinic and 1 skilled nursing facility, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Massiah practices, 6 sites in all. Vendor and product names are available with a free account.

Pulmonary disease is Dr. Massiah's primary specialty in the NPI Registry, under taxonomy code 207RP1001X. Dr. Massiah is licensed in New York.

CMS data shows 1,058 Medicare services from Dr. Massiah across 14 procedure codes in 2024, for 376 Medicare patients. Medicare paid $86,879 for them. Every service was in an office.

CMS counts 376 Medicare patients who saw Dr. Massiah in 2024. The largest group is 75 to 84, with 156 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% 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. Massiah's median patient age at 65, with 47% women.

In 2024, Dr. Massiah wrote 758 Medicare Part D claims for 197 patients. 28% of them were for generic drugs. CMS names the drug for 651 of them, across 14 drugs with 11 or more claims each, at $518,264 in total drug cost. In 2023, CMS named 628 claims across 12 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Dr. Massiah for performance year 2024, reported through an alternative payment model (APM). Dr. Massiah accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Massiah as offering telehealth.

CMS Open Payments shows 381 general payments to Dr. Massiah from 24 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 56% of the total. Boehringer Ingelheim Pharmaceuticals, Inc. paid the most, $21,785.

Dr. Massiah graduated from Wayne State University School of Medicine in 1998.