Actually, the DSM-V covers spreadsheet addiction on page 272 in section 7.8.9.2-5.4-22.00, subsection 3, sub-sub-section 5.5.7. There is also a detailed description of the symptoms in Excell, but only in the 2003 version. Later versions were stripped of the description because Bill and Melinda needed the money they were losing on class-action lawsuits to go vaccinate Africa.

I do believe compulsory story telling that borders on telling lies has a DSM-V listing too.