| Cover | Nov. 03, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 03, 2023 |
| Entity Registrant Name | NorthStar Healthcare Income, Inc. |
| Entity Incorporation, State or Country Code | MD |
| Entity File Number | 000-55190 |
| Entity Tax Identification Number | 27-3663988 |
| Entity Address, Address Line One | 16 East 34th Street, 18th Floor |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10016 |
| Entity Address, City or Town | New York |
| City Area Code | 929 |
| Local Phone Number | 777-3135 |
| 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 |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001503707 |
| Amendment Flag | false |
