Dr. Daniel William O'Neill, MD

Dr. O'Neill practices at Day Kimball Hospital in Putnam, Connecticut, part of Day Kimball Health.

Dr. O'Neill's NPI, 1972578508, was assigned on February 17, 2006. Dr. O'Neill graduated from State University of New York at Stony Brook, School of Medicine in 1992. Dr. O'Neill holds Connecticut license 036878.

Dr. O'Neill's primary practice is Day Kimball Hospital, at 320 Pomfret Street, Putnam, CT 06260 in Windham County. The practice phone is (860) 928-6541.

Dr. O'Neill's primary practice is Day Kimball Hospital in Putnam, Connecticut, part of Day Kimball Health. Dr. O'Neill is also affiliated with UMass Memorial Health - Harrington Hospital. The medical group on file is Day Kimball Medical Group. Dmand AI also links Dr. O'Neill to 1 more hospital, 2 group practices and clinics, 2 home health agencies, 2 medical groups, 1 hospice 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. O'Neill practices, 9 sites in all. Vendor and product names are available with a free account.

Internal medicine is Dr. O'Neill's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. O'Neill is licensed in Connecticut.

CMS data shows 881 Medicare services from Dr. O'Neill across 13 procedure codes in 2024, for 307 Medicare patients. Medicare paid $86,831 for them.

CMS counts 307 Medicare patients who saw Dr. O'Neill in 2024. The largest group is 65 to 74, with 113 patients. 70% of them have high blood pressure, and 67% have high cholesterol. 31% are also on Medicaid. Their average risk score is 1.32, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. O'Neill's median patient age at 70, with 47% women.

In 2024, Dr. O'Neill wrote 12,619 Medicare Part D claims for 781 patients. 86% of them were for generic drugs. CMS names the drug for 11,678 of them, across 166 drugs with 11 or more claims each, at $1,588,393 in total drug cost. In 2023, CMS named 10,920 claims across 173 drugs.

Dr. O'Neill accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. O'Neill as offering telehealth.

Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)

Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)

Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)

CMS Open Payments shows 591 general payments to Dr. O'Neill from 45 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. Boehringer Ingelheim Pharmaceuticals, Inc. paid the most, $1,280.

Dr. O'Neill graduated from State University of New York at Stony Brook, School of Medicine in 1992.