Every shift in Animal Hospital gets easier or harder depending on the class you equip. Each of the ten classes changes how you survive, move, treat patients, and deal with anomalies, and they cost either Animal Coins or Robux. Below is a straight ranking of all classes, what each one does at every upgrade level, and the smartest picks for both free-to-play and premium players.
Quick answer: The best all-round class is the Surgeon (2,500 Animal Coins) for free-to-play players, since it restores sanity and grants a movement speed boost after every heal. If you can spend Robux, the Secret Agent starts you with a gun and trivializes anomalies. The Head Nurse is the top Robux support pick for extra inventory space.
How classes work in Animal Hospital
Classes provide three kinds of benefits. Sanity perks keep your meter from draining out, utility perks change things like inventory size or movement, and starter items give you gear at the beginning of each round. Every class has three upgrade levels, and the bonuses grow stronger as you level them up.
To buy or switch a class, walk into the yellow ‘Classes’ indicator in the lobby, located in front of the ambulance on the left side of the spawn. After purchasing, open the ‘Classes’ button on the left menu to equip the one you want. Once equipped, the class name shows above your avatar icon in the lobby. There is no code system in the game, so every class must be earned with Animal Coins or bought with Robux.
All Animal Hospital classes ranked
Here is the tier placement for every class based on how much its perk actually helps during a run and how its cost compares to the value it provides.
| Tier | Classes | Why |
|---|---|---|
| S | Surgeon, Head Nurse | The most impactful perks; strong in solo and team play. |
| A | Secret Agent | Makes anomalies trivial and speeds up runs. |
| B | Nurse, Security | Solid beginner-friendly options. |
| C | Doctor, Psychologist, Secretary | Sanity-only perks with limited upside. |
| D | Paramedic, Intern | Weak perks that add little value. |
Best classes: Surgeon and Head Nurse (S Tier)
The Surgeon is the most well-rounded class in the game. Every time you heal a patient, you recover sanity and get a short movement speed boost, which is a major quality-of-life gain when playing solo. It is the most expensive Animal Coin class, but for free players it is the clear end goal.
The Head Nurse is the strongest support class, though it is only available for Robux. Extra inventory space cuts down the trips you make between the office, patient rooms, and supply machines, and it stays useful in both solo and team runs.
| Class | Level | Perk | Cost |
|---|---|---|---|
| Surgeon | 1 | Sanity and a short speed boost after healing a patient | 2,500 Animal Coins |
| 2 | Sanity and a longer (8s) speed boost after healing | ||
| 3 | 2x sanity and a longer (8s) speed boost after healing, +10 bonus sanity | ||
| Head Nurse | 1 | +3 max inventory capacity | Robux only |
| 2 | +3 max inventory capacity, +10 bonus sanity | ||
| 3 | +3 max inventory capacity, start each round with a Special Technique upgrade |
Secret Agent (A Tier)
The Secret Agent is a premium class that hands you a gun at the start of each round. It completely breaks the difficulty of anomalies, since you can simply eliminate any monster you cannot otherwise handle. This makes it excellent for both solo runs and team speedruns. The only catch is that it is obtainable with Robux only.
| Level | Perk |
|---|---|
| 1 | Start with a gun (dangerous, 20 uses) |
| 2 | Start with a gun (30 uses), +10 bonus sanity |
| 3 | Start with a gun (30 uses) that regenerates 1 use each round, +20 bonus sanity |
Nurse and Security (B Tier)
The Nurse is a low-cost, free-to-play version of the Head Nurse. It raises your inventory capacity, which helps whenever patients start stacking up in rooms, and it becomes even more valuable when two or more players run it in a team.
Security starts you with an X-Taser, making it strong for handling threats in team play. It shines in the hands of an experienced player who manages the limited uses carefully, though its cost is a little high for what it delivers and it is less ideal for solo runs.
| Class | Level | Perk | Cost |
|---|---|---|---|
| Nurse | 1 | +1 max inventory capacity | 20 Animal Coins |
| 2 | +2 max inventory capacity | ||
| 3 | +3 max inventory capacity | ||
| Security | 1 | Start with X-Taser (5 uses) | 1,250 Animal Coins |
| 2 | Start with X-Taser (6 uses) | ||
| 3 | Start with X-Taser (6 uses), regenerate 1 use each round |
Doctor, Psychologist, and Secretary (C Tier)
These three classes all revolve around sanity, which is not the strongest focus right now. They can make a run less stressful, but their buffs are modest and start to feel redundant once you learn to manage sanity on your own.
The Doctor restores sanity every time you successfully heal a patient and adds bonus sanity at higher levels. The Psychologist doubles all sanity effects, which is powerful if you know what you are doing but risky since negative effects are doubled too. The Secretary offers a similar recovery perk to the Doctor at a much lower cost, making it a fine early pick for learning sanity management.
| Class | Level | Perk | Cost |
|---|---|---|---|
| Doctor | 1 | Recover 1 sanity when healing patients | 900 Animal Coins |
| 2 | Recover sanity when healing, +15 bonus sanity | ||
| 3 | Recover sanity when healing, +20 bonus sanity | ||
| Psychologist | 1 | All sanity effects doubled (positive and negative) | 500 Animal Coins |
| 2 | Sanity effects doubled, 7.5% chance to ignore sanity loss | ||
| 3 | Sanity effects doubled, 15% chance to ignore sanity loss | ||
| Secretary | 1 | Recover 1 sanity when checking in patients | 120 Animal Coins |
| 2 | Recover 2 sanity when checking in patients, +5 bonus sanity | ||
| 3 | Recover sanity when checking in patients, +10 bonus sanity |
Paramedic and Intern (D Tier)
The Paramedic starts you with a Large Speed Cola for a movement boost, but the effect is short, and you can buy the same cola from the Supplies Shop anyway. The Intern is the free starter class and simply gives you bonus sanity at the beginning, which drains quickly and offers nothing else. Both have low unlock costs, but their perks bring little to a run.
| Class | Level | Perk | Cost |
|---|---|---|---|
| Paramedic | 1 | Start with Large Speed Cola (6 uses) | 250 Animal Coins |
| 2 | Start with Large Speed Cola (9 uses) | ||
| 3 | Start with Large Speed Cola (9 uses), regenerate 1 use each round | ||
| Intern | 1 | Start with 10 bonus sanity | Free |
| 2 | Start with 15 bonus sanity | ||
| 3 | Start with 20 bonus sanity |
Which class to pick for your budget
If you are free-to-play, save toward the Surgeon as your long-term goal. Along the way, the Secretary is an affordable early buy at 120 Animal Coins that helps you learn sanity management, and the Psychologist works as a middle step if you want more survivability. The full free-to-play path looks like Secretary, then Psychologist, then Surgeon.
If you are willing to spend Robux, the Secret Agent is the strongest single purchase and lets you skip the coin grind entirely. The sooner you start leveling it up, the more effective it becomes. The Head Nurse is the better choice if you would rather play a support role focused on inventory and preparation.
Note: The most recent update did not add any new classes. It only introduced cosmetic skins for the Intern, Nurse, Psychologist, Security, Head Nurse, and Secret Agent. Skins are purely visual and provide no gameplay bonuses, so they do not change any of the tier placements above.
Whichever route you take, the core rule stays the same. Spend your Animal Coins on classes with utility or movement perks first, and treat sanity-only classes as stepping stones rather than final picks.
