Depending upon the circumstances of each transaction, payments may be made by the center to the provider, by the provider to the center or by a third party payor to the provider or the center. The amount of fees that the centers paid for these services were $8.4 million in 2019.
Mr. Reis, along with Robert Hartman, Arnold Whitman, Steve Fishman and Isaac Neuberger, indirectly beneficially held ownership interests in Trident USA totaling less than 10% in the aggregate until September 20, 2019, on which date Trident USA reorganized under Chapter 11. Messrs. Reis, Hartman, Whitman, Fishman and Neuberger no longer hold any ownership in Trident USA after such restructuring.
Consulate Healthcare - Therapy Agreements; Promissory Notes
Robert Hartman, Steve Fishman, David Reis, Isaac Neuberger and Arnold Whitman, indirectly hold, in the aggregate, material ownership interests in Consulate Health Care (Consulate). Messrs. Hartman and Neuberger serve on the Board of Consulate.
Between 2015 and 2018, Genesis Rehabilitation Services (GRS), a subsidiary of the Company, entered into agreements, in the ordinary course of business and on arms-length terms, with healthcare centers operated under Consulate, which is an affiliate of Lavie Care Centers, LLC, pursuant to which GRS provides therapy and respiratory services to such centers. The estimated aggregate dollar amount of billings by GRS to Consulate centers for therapy during 2019 and 2020 was approximately $111.4 million and $99.6 million, respectively. GRS currently serves approximately 130 Consulate centers.
On October 10, 2018, effective as of July 1, 2018, Consulate and various Consulate affiliates executed a Promissory Note (the Consulate GRS Note) in favor of GRS in the face amount of $58.8 million which, among other things, converted certain amounts owed by Consulate into the principal amount of the Consulate GRS Note. As of December 31, 2020, the outstanding balance on the Consulate GRS Note was $56.3 million. The Company has reserved $55.0 million on the note receivable balance.
Between 2015 and 2018, Respiratory Health Services (RHS), a subsidiary of the Company, entered into agreements, in the ordinary course of business and on arms-length terms, with healthcare centers operated by Consulate pursuant to which RHS provides respiratory services to such centers. The estimated aggregate dollar amount of billings by RHS to Consulate centers for respiratory services during 2019 and 2020 was approximately $2.9 million and $2.4 million, respectively. RHS currently serves approximately 130 Consulate centers.
On October 24, 2018, effective as of July 1, 2018, Consulate and various Consulate affiliates executed a Promissory Note (the Consulate RHS Note) in favor of RHS in the face amount of $0.3 million which, among other things, converted certain amounts owed by Consulate into the principal amount of the Consulate RHS Note. As of December 31, 2020, the Consulate RHS Note has been fully retired.
Welltower Inc. - Master Lease
As of March 12, 2021, Welltower Inc. (Welltower) held approximately 8.8% of the shares of the Company's Class A Common Stock, representing approximately 5.7% of the voting power of the Company's voting securities.
On January 31, 2017, the Company entered into the Twentieth Amended and Restated Master Lease Agreement (the Master Lease), in the ordinary course of business and on arms-length terms, with FC-GEN Real Estate, LLC (FC-GEN Real Estate), which is a subsidiary of Welltower, for the lease of healthcare facilities from FC-GEN Real Estate.
During 2019 and 2020, the Company and FC-GEN Real Estate amended the Master Lease to amend and restate financial covenants, to remove certain facilities from the Master Lease that FC-GEN Real Estate had sold and to revise the rent schedule accordingly. The initial term of the Master Lease, as amended, expires on January 31, 2037 and the Company has an option to renew through December 31, 2048. As of December 31, 2020, the Company leased 44 facilities from FC-GEN Real Estate. For the years ended December 31, 2019 and 2020, the Company paid rent of approximately $73.7 million and $70.6 million, respectively, to FC-GEN Real Estate.
The Company's board of directors reviewed and approved each agreement with FC-GEN Real Estate and Welltower that was material to the Company or which was not entered into in the ordinary course of business. The board of directors and the Audit