Dr. Karen C. Halasan, MD

Dr. Halasan practices at Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut.

Dr. Halasan's NPI, 1508029836, was assigned on July 7, 2008. Dr. Halasan holds Connecticut license 052581.

Dr. Halasan's primary practice is Nuvance Health Medical Practice CT, Inc., at 100 Reserve Rd, Danbury, CT 06810 in Western Ct County. The practice phone is (203) 739-7742.

Dr. Halasan's primary practice is Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut. Dr. Halasan is also affiliated with Northwell Danbury Hospital. The medical group on file is Danbury Medical Group. Dmand AI also links Dr. Halasan to 1 more hospital, 3 group practices and clinics and 2 medical groups, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Halasan practices, 5 sites in all. Vendor and product names are available with a free account.

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

CMS data shows 858 Medicare services from Dr. Halasan across 9 procedure codes in 2024, for 288 Medicare patients. Medicare paid $64,423 for them.

CMS counts 288 Medicare patients who saw Dr. Halasan in 2024. The largest group is 75 to 84, with 109 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 22% are also on Medicaid. Their average risk score is 1.82, 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. Halasan's median patient age at 71, with 55% women.

In 2024, Dr. Halasan wrote 5,106 Medicare Part D claims for 616 patients. CMS names the drug for 4,934 of them, across 45 drugs with 11 or more claims each, at $2,632,015 in total drug cost. In 2023, CMS named 4,365 claims across 41 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Halasan for performance year 2024, reported individually. Dr. Halasan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Halasan as offering telehealth.

CMS Open Payments shows 314 general payments to Dr. Halasan from 39 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 91% of the total. GlaxoSmithKline, LLC. paid the most, $1,485.