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 | 29 | 21 | 7 | 1 | 69 | 27 | 42 | 70 |
| 2 | Arsenal | 28 | 15 | 10 | 3 | 52 | 24 | 28 | 55 |
| 3 | Nottingham ForestNott'm Forest | 28 | 15 | 6 | 7 | 45 | 33 | 12 | 51 |
| 4 | Chelsea | 28 | 14 | 7 | 7 | 53 | 36 | 17 | 49 |
| 5 | Manchester CityMan City | 28 | 14 | 5 | 9 | 53 | 38 | 15 | 47 |
| 6 | Newcastle UnitedNewcastle | 28 | 14 | 5 | 9 | 47 | 38 | 9 | 47 |
| 7 | Brighton & Hove AlbionBrighton | 28 | 12 | 10 | 6 | 46 | 40 | 6 | 46 |
| 8 | Aston Villa | 29 | 12 | 9 | 8 | 41 | 45 | -4 | 45 |
| 9 | Bournemouth | 28 | 12 | 8 | 8 | 47 | 34 | 13 | 44 |
| 10 | Fulham | 28 | 11 | 9 | 8 | 41 | 38 | 3 | 42 |
| 11 | Crystal Palace | 28 | 10 | 9 | 9 | 36 | 33 | 3 | 39 |
| 12 | Brentford | 28 | 11 | 5 | 12 | 48 | 44 | 4 | 38 |
| 13 | Tottenham HotspurSpurs | 28 | 10 | 4 | 14 | 55 | 41 | 14 | 34 |
| 14 | Manchester UnitedMan Utd | 28 | 9 | 7 | 12 | 34 | 40 | -6 | 34 |
| 15 | Everton | 28 | 7 | 12 | 9 | 31 | 35 | -4 | 33 |
| 16 | West Ham UnitedWest Ham | 28 | 9 | 6 | 13 | 32 | 48 | -16 | 33 |
| 17 | Wolverhampton WanderersWolves | 28 | 6 | 5 | 17 | 38 | 57 | -19 | 23 |
| 18 | Ipswich TownIpswich | 28 | 3 | 8 | 17 | 26 | 58 | -32 | 17 |
| 19 | Leicester CityLeicester | 28 | 4 | 5 | 19 | 25 | 62 | -37 | 17 |
| 20 | Southampton | 28 | 2 | 3 | 23 | 20 | 68 | -48 | 9 |
| > Premier League Full Table | |||||||||
