Effective January 1, 2016, CVS/caremark will begin to administer the prescription benefits for ONE Gas. Please update or create plan member profiles to reflect the changes regarding the following new plan adjudicating through CVS/caremark. RXBIN: 004336 RXPCN: ADV RXGRP: RX0141 Member ID Format: 9 digits Person Code : 2 digits

Effective January 1, 2016, CVS/caremark will administer the prescription benefits for Precision Components International (PCI) as PCI employees transition to United Technologies Corporation benefits. IMPORTANT: These members will need to present a new CVS/caremark card. Please update or create plan member profiles to reflect the changes regarding the following new plan adjudicating through CVS/caremark. RXBIN: 004336 RXPCN: ADV RXGRP: RX6483, RX6484, RX6485, RX6486, RX6487 Member ID Format: 9 digits Person Code : 2 digits

The "Michigan Addendum to Caremark Provider Agreement" (beginning on page 160) has been deleted in its entirety and replaced with the following: The Caremark Provider Agreement is hereby amended as set forth in the Provider Agreement to incorporate the following language. In the event any provision in this Addendum conflicts with the terms of the Provider Agreement (including the Provider Manual and Caremark Documents), the terms of this Addendum shall govern. To the extent that Provider shall provide Pharmacy Services to Eligible Persons enrolled with a Health Maintenance Organization ("HMO"), Insurer, or Carrier licensed under Michigan law (collectively and/or individually, "Plan Sponsor"), Provider agrees to comply with any requirements for participation as a Provider in Michigan as follows:

Effective January 1, 2016, CVS/caremark will begin to administer the prescription benefits for Chesapeake Energy Corporation. Please update or create plan member profiles to reflect the changes regarding the following new plan adjudicating through CVS/caremark. RXBIN: 004336 RXPCN: ADV RXGRP: RX1170 Member ID Format: KPK+9 digits Person Code : Not required

Effective January 1, 2016, CVS/caremark will begin to administer the prescription benefits for Elder Plan Medicare-Medicaid plan members. Please update or create plan member profiles to reflect the changes regarding the following new plan adjudicating through CVS/caremark. RXBIN: 004336 RXPCN: MEDDADV RXGRP: RX8587 Member ID Format: 11 digits Person Code : Not required