10 Mount Sinai Health System revenue cycle leaders
Lisa Mackey, System Vice President, Front End Revenue Cycle, is one of these Mount Sinai Health System revenue cycle leaders, whose current titles also cover patient access, faculty practice revenue cycle, patient financial services and revenue integrity. A reader can learn how revenue cycle leaders work at Mount Sinai Health System from people who have held the role.
Professionals to explore
Adrin Mammen
LinkedInExperience: Vice President & Chief Of Ambulatory Patient Access · Mount Sinai Health System
Adrin Mammen has been Vice President & Chief Of Ambulatory Patient Access at Mount Sinai Health System since August 2022, based in the New York City Metropolitan Area, and the profile headline names driving access, capacity and digital transformation, reducing no-shows, scaling self-service and improving throughput.
Colin Grant
LinkedInExperience: Senior Director Patient Financial Services · Mount Sinai Health System
Colin Grant has been Senior Director Patient Financial Services at Mount Sinai Health System since April 2026, based in Greater Philadelphia. Colin Grant was Systems Director of Revenue Cycle at Bristol Hospital and Health Care Group, Inc. from 2024 to 2026 and Director of Revenue Cycle Integration at Tower Health from 2019 to 2021.
Erwin Ramirez
LinkedInExperience: Assistant Vice President Patient Financial Servcies · Mount Sinai Health System
Erwin Ramirez has been Assistant Vice President Patient Financial Servcies at Mount Sinai Health System since July 2022, based in New York, and the profile also lists a Senior Director Patient Financial Services role at The Mount Sinai Hospital from 2004 with no end date. Erwin Ramirez was Director of Financial Counseling at Mount Sinai Health System from 1990 to 2004.
Evelyn Placencia
LinkedInExperience: Director of Patient Financial Services · Mount Sinai Health System
Evelyn Placencia has been Director of Patient Financial Services at Mount Sinai Health System since October 2014, based in New York. At Mount Sinai Health System, Evelyn Placencia was Assistant Director of Patient Financial Services from 2008 to 2014 and Manager of Patient Financial Services from 2006 to 2008.
Lisa Mackey, DHSc, MHA, CRCR
LinkedInExperience: System Vice President, Front End Revenue Cycle · Mount Sinai Health System
Lisa Mackey has been System Vice President, Front End Revenue Cycle at Mount Sinai Health System since December 2025. Lisa Mackey was Vice President, Patient Access at Lehigh Valley Health Network from 2017 to 2025, Administrator, Patient Access there from 2015 to 2017 and Director, Patient Access Services there from 2014 to 2015.
Maraj Dunkley, MPA
LinkedInExperience: Revenue Cycle Director · Mount Sinai Health System
Maraj Dunkley has been Revenue Cycle Director at Mount Sinai Health System since 2015, based in New York. Maraj Dunkley was Director of Operations & Credentialing at West Side Billing Services from 1994 to 2014 and Billing Supervisor at Lenox Hill Radiologist PC from 1987 to 1993.
Michele Dykstra
LinkedInExperience: Assistant Vice President, Finance-Revenue Integrity · Mount Sinai Health System
Michele Dykstra has been Assistant Vice President, Finance-Revenue Integrity at Mount Sinai Health System since September 2025, based in the New York City Metropolitan Area. Michele Dykstra was Assistant Vice President Revenue Management and Integrity at Catholic Health from 2017 to 2025.
Peter Blunck
LinkedInExperience: V.P. of Revenue Cycle · The Mount Sinai Hospital
Peter Blunck has been V.P. of Revenue Cycle at The Mount Sinai Hospital since January 2018, based in Larchmont, New York, and was Sr Director of Revenue Cycle at The Mount Sinai Hospital from 2004 to 2018. Peter Blunck worked in Patient Financial Services at NYU Medical Center from 1990 to 2004.
Raul Aguilar
LinkedInExperience: Director of Revenue Cycle & Patient Access · Mount Sinai Health System
Raul Aguilar has been Director of Revenue Cycle & Patient Access at Mount Sinai Health System since March 2016, based in New York, and was also Director, Billing at Mount Sinai Health System from 2001 to 2022. The profile headline gives the current role as Director of Revenue Cycle & Patient Access.
Richard Nagengast
LinkedInExperience: Vice President Revenue Cycle, Mount Sinai Doctors Faculty Practice · Mount Sinai Health System
Richard Nagengast has been Vice President Revenue Cycle, Mount Sinai Doctors Faculty Practice at Mount Sinai Health System since July 2017, based in New York. Richard Nagengast was Director of Patient Accounting at Northwestern Memorial HealthCare from 2010 to 2017 and Senior Director, Revenue Cycle Management Western Region at GE HealthCare from 2007 to 2009.
Choose the right perspective
Match the part of the revenue cycle in a person's title, such as front end and patient access, patient financial services or revenue integrity, to the question you need answered. Weigh whether a system-wide, hospital or faculty practice role sits closest to the decision you face.
Questions to take into the conversation
- 01What did you focus on first when you took on your revenue cycle role at Mount Sinai Health System?
- 02What would you do differently if you started your revenue cycle role at Mount Sinai Health System again?
- 03What has your own work at Mount Sinai Health System taught you about measuring revenue cycle performance?
Reaching Mount Sinai Health System revenue cycle leaders
How can I contact one of these Mount Sinai Health System revenue cycle leaders?
Pick one of the 10 people on this page and choose "Book a paid call", or describe your project to find others. You offer a fee for a 15-minute call or a written answer, Instant Expert finds the person's work email and sends the invitation, and they decide whether to accept. The list covers 2 companies: Mount Sinai Health System and The Mount Sinai Hospital, based on profile data retrieved on October 25, 2026. Being listed here doesn't mean someone has agreed to take calls.
How much does it cost to reach Mount Sinai Health System revenue cycle leaders?
You choose the offer, starting at $5 per person. The offer is what the person receives, and Instant Expert's fee is added on top, so a $100 offer costs you $125. The fee is 20% of what you pay. You're charged only when the person books the call or sends the answer.
What if they don't reply?
You pay nothing. Instant Expert sends follow-up reminders, and if the person hasn't booked or answered within 7 days, the request expires and any hold on your card is released. You can invite several of the 10 people on this list at once and cap your total spend, so you pay only for the ones who accept.
Can an AI agent ask one of these Mount Sinai Health System revenue cycle leaders a question?
Yes. An agent with a USDC wallet on Base can ask one question without an Instant Expert account. It names the person, for example by the LinkedIn URL on this page, and pays per ask over x402 (HTTP 402). The person answers in writing or by voice note, and if nobody answers within 7 days, the payment goes back to the wallet automatically. Claude and ChatGPT can do the same through the Instant Expert connector: setup is at /docs/mcp for Claude and /docs/chatgpt for ChatGPT. x402 docs
About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot; roles marked former had ended by then. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.