| Cover | Oct. 18, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 18, 2021 |
| Entity File Number | 001-33989 |
| Entity Registrant Name | LHC GROUP, INC. |
| Entity Central Index Key | 0001303313 |
| Entity Tax Identification Number | 71-0918189 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 901 Hugh Wallis Road South |
| Entity Address, City or Town | Lafayette |
| Entity Address, State or Province | LA |
| Entity Address, Postal Zip Code | 70508 |
| City Area Code | 337 |
| Local Phone Number | 233-1307 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | LHCG |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
