General and administrative expenses, excluding depreciation and amortization, increased $14.2 million, or 8.5%, to $181.6 million in 2000 from $167.4 million in 1999. The increase in these expenses is partially attributable to HealthLink's geographic and member expansion efforts, which resulted in increased HealthLink expenses of $4.9 million in 2000 as compared to 1999. The increase in general and administrative expenses is also attributable to an increase of 7.3% in underwritten membership in 2000 as compared to 1999. Also, we incurred $2.0 million and $3.8 million of general and administrative expenses in 2000 and 1999, respectively, related to our reorganization which was completed on November 30, 2000. See description of the reorganization in Note 1, "Organization" of the Notes to Consolidated Financial Statements of Part II, Item 8, which is incorporated by reference.
Fees and other income from ASO, self-funded network services and life insurance commission revenues increased $16.4 million, or 19.1%, to $102.6 million in 1999 from $86.2 million in 1998. These increases are primarily due to increased 1999 revenues of $14.2 million from HealthLink, our network rental and managed care service subsidiary. HealthLink's increase in revenues was partially due to expansion into new territories as well as membership growth in HealthLink's managed health care and workers' compensation programs and increases in client access fees. Additionally, HealthLink's membership increases during this period included a transfer of approximately 10,000 members to HealthLink from our other self-funded plans. In addition, our BlueCard(R) PPO and National Account ASO revenues increased by $5.6 million in 1999 due to a 27.3% increase in member months. Administrative service revenue was reduced by the cancellation in June 1999 of an administrative fee contract for electronic data processing services resulting in a decrease to 1999 revenue of $1.0 million as compared to 1998.
Operating expenses for our underwritten segment increased $24.0 million, or 3.0%, to $822.9 million in 1999 from $798.9 million in 1998, due to an increase in health care service costs of $23.8 million in 1999 as compared to 1998. Operating expenses for our self-funded segment increased $6.0 million, or 9.1%, to $72.0 million in 1999 from $66.0 million in 1998. This increase was primarily due to an increase in HealthLink's general and administrative expenses of $6.6 million, as previously described. Operating expenses for our other segment decreased $0.1 million, or 1.1%, to $4.7 million in 1999 from $4.8 million in 1998.
Other than the commitments noted above and normal operating needs, we currently have no definitive material commitments for future use of our current or expected levels of available cash resources. We continually evaluate opportunities to expand our operations. Our expansion options may include additional acquisitions and internal development of new products and programs. Our available cash resources will remain primarily in interest-bearing investments until they are utilized for such purposes. We believe that we will have sufficient cash flow and cash available without regulatory approval to fund our expected capital expenditures described above in 2001.