CMS ICD-10 Statement and Effective Date
https://www.cms.gov/ICD10/

ICD-10 Search
http://apps.who.int/classifications/apps/icd/icd10online/

AMA ICD-10 Statement and Resources
http://www.ama-assn.org/ama/pub/physician-resources/solutions-managing-your-practice/coding-billing-insurance/hipaahealth-insurance-portability-accountability-act/transaction-code-set-standards/icd10-code-set.page

Code Translator ICD-9 to ICD-10 and ICD-10 to ICD-9
http://www.aapc.com/ICD-10/codes/index.aspx

Wikipedia
http://en.wikipedia.org/wiki/ICD-10

ICD10Codes.com
http://www.icd10codes.com/

The Official Web Site for the Medicare and Medicaid Electronic Health Records (EHR) Incentive Programs
http://www.cms.gov/ehrincentiveprograms/