The 28-year-old, who has been capped 15 times by Italy at senior international level, will stay at Upton Park until the end of the season.
He is expected to make his Hammers debut in Wednesday's Premier League game with Chelsea at Stamford Bridge.
Nocerino has scored 12 goals in 72 Serie A appearances for Milan since signing from Palermo in 2011.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Liverpool | 20 | 14 | 5 | 1 | 48 | 20 | 28 | 47 |
| 2 | Arsenal | 21 | 12 | 7 | 2 | 41 | 19 | 22 | 43 |
| 3 | Nottingham ForestNott'm Forest | 21 | 12 | 5 | 4 | 30 | 20 | 10 | 41 |
| 4 | Newcastle UnitedNewcastle | 21 | 11 | 5 | 5 | 37 | 22 | 15 | 38 |
| 5 | Chelsea | 21 | 10 | 7 | 4 | 41 | 26 | 15 | 37 |
| 6 | Manchester CityMan City | 21 | 10 | 5 | 6 | 38 | 29 | 9 | 35 |
| 7 | Aston Villa | 21 | 10 | 5 | 6 | 31 | 32 | -1 | 35 |
| 8 | Bournemouth | 21 | 9 | 7 | 5 | 32 | 25 | 7 | 34 |
| 9 | Fulham | 21 | 7 | 9 | 5 | 32 | 30 | 2 | 30 |
| 10 | Brentford | 21 | 8 | 4 | 9 | 40 | 37 | 3 | 28 |
| 11 | Brighton & Hove AlbionBrighton | 20 | 6 | 10 | 4 | 30 | 29 | 1 | 28 |
| 12 | West Ham UnitedWest Ham | 21 | 7 | 5 | 9 | 27 | 41 | -14 | 26 |
| 13 | Tottenham HotspurSpurs | 21 | 7 | 3 | 11 | 43 | 32 | 11 | 24 |
| 14 | Crystal Palace | 21 | 5 | 9 | 7 | 23 | 28 | -5 | 24 |
| 15 | Manchester UnitedMan Utd | 20 | 6 | 5 | 9 | 23 | 28 | -5 | 23 |
| 16 | Everton | 20 | 3 | 8 | 9 | 15 | 26 | -11 | 17 |
| 17 | Ipswich TownIpswich | 20 | 3 | 7 | 10 | 20 | 35 | -15 | 16 |
| 18 | Wolverhampton WanderersWolves | 21 | 4 | 4 | 13 | 31 | 48 | -17 | 16 |
| 19 | Leicester CityLeicester | 21 | 3 | 5 | 13 | 23 | 46 | -23 | 14 |
| 20 | Southampton | 20 | 1 | 3 | 16 | 12 | 44 | -32 | 6 |
| > Premier League Full Table | |||||||||
