Dr. Konstantinos D. Vlachonassios, MD

Dr. Vlachonassios practices at Konstantinos Vlachonassios MD Inc in Downey, California.

Dr. Vlachonassios' NPI, 1851473003, was assigned on October 19, 2006. Dr. Vlachonassios graduated from Aristotle University of Thessaloniki School of Medicine in 1988. Dr. Vlachonassios' California license number on file is A52738.

Dr. Vlachonassios' primary practice is Konstantinos Vlachonassios MD Inc, at 11101 La Reina Ave, Downey, CA 90241 in Los Angeles County. The practice phone is (562) 622-9500.

Dr. Vlachonassios' primary practice is Konstantinos Vlachonassios MD Inc in Downey, California. Dr. Vlachonassios is also affiliated with PIH Health Downey Hospital. Dmand AI also links Dr. Vlachonassios to 3 more hospitals and 1 physician office, each named with a free account.

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

Cardiovascular disease is Dr. Vlachonassios' primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Vlachonassios is board certified in cardiovascular disease by the American Board of Internal Medicine. Dmand AI has Dr. Vlachonassios' licenses on file in 2 states: California and Arizona.

Dmand AI lists aneurysm, angioplasty, atrial fibrillation and flutter, cardiac catheterization, cardiomyopathy, chronic hypertension, chronic skin ulcer and coronary artery disease among the conditions Dr. Vlachonassios treats.

CMS data shows 1,492 Medicare services from Dr. Vlachonassios across 13 procedure codes in 2024, for 399 Medicare patients. Medicare paid $116,697 for them.

CMS counts 399 Medicare patients who saw Dr. Vlachonassios in 2024. The largest group is 65 to 74, with 135 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 54% are also on Medicaid. Their average risk score is 2.77, 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. Vlachonassios' median patient age at 71, with 53% women.

In 2024, Dr. Vlachonassios wrote 7,757 Medicare Part D claims for 547 patients. 74% of them were for generic drugs. CMS names the drug for 7,320 of them, across 88 drugs with 11 or more claims each, at $2,564,708 in total drug cost. In 2023, CMS named 7,560 claims across 86 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Vlachonassios for performance year 2024, reported individually. Dr. Vlachonassios accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 15 procedures of coronary angioplasty and stenting by Dr. Vlachonassios, more than 40% of the clinicians it reports for that procedure.

Leg revascularization (restoring blood flow): 1 to 10 procedures (CMS shows small counts as a range)

Pacemaker insertion or repair: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 4 papers to Dr. Vlachonassios. The most frequent topics are Blood Flow Velocity, Coronary Circulation and Coronary Vessels. Dr. Vlachonassios has published most often in Am J Cardiol. Dr. Vlachonassios' most frequent co-authors are Ghasan M. Tabel, MD, Niveen K. Abdelmessih, MD and Sajen J. Mathews, MD.

CMS Open Payments shows 1,811 general payments to Dr. Vlachonassios from 61 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 39% of the total. Amgen Inc. paid the most, $48,490.

Dmand AI lists 1 award for Dr. Vlachonassios, most recently CMS Stage 1 EHR in 2013.

Dr. Vlachonassios graduated from Aristotle University of Thessaloniki School of Medicine in 1988.

Dr. Vlachonassios is in network with 16 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.