The VA website doesn't help. Does anyone know how to get reassessed for their VA disability rating from overseas?

Sir, I actually work for VBA, so I can honestly say yes.

At the bare minimum you need to complete the VA Form 526EZ and send it in to you local VA regional office. Once that is done they will communicate with you and send out letters communicating anything else they need.

When filling out the the portion telling them what disabilities you want looked at you can simply indicate the condition and say "increase" (if already service connected), "new", "secondary" (if caused by an existing or new service connected condition), "Gulf War" (if connected to any presumptive disorders under 38 CFR 3.317), or "Agent Orange" (if it falls under the herbicide presumptive in 38 CFR 3.307 & 3.309).

I hope this helps a little, Sir.

Get an advocate. DAV, MOPH, VFW. They know the ins and outs of the system. I used the Military Order of the Purple Heart. You don't need to be a member. Good Luck.

Being in New Zealand, I can imagine it is very difficult to find anyone to assist you with this. First, take a good hard look at title 38 US Code of Federal Regulations. You can find it on the internet. This is the law by which the VA determines your disability percentage. Once you find the particular disability you want re-assessed for increase, read very carefully. If you think you can justify an increase according to the regulation(s), by all means file a VA form 21-526 for an increase in your disability percentage. The VA has a wide variety of disability benefits questionnaire forms. These are tailored to particular types of disabilities, and can be filled out by any doctor, anywhere. For example, VA form 21-0960M-6 is for foot conditions. These can be downloaded from the VA website here: http://www.va.gov/vaforms/Default.asp?CurrentPage=4&orderby=. You can scroll through the list of 21-960x forms starting on page 4 until you find the one that best fits your disability. When you write your claim, you must justify any claimed increase, and your doctor(s) must agree. But if title 38 says your particular disability is limited to a certain percentage, and you are already at that percentage, don't waste your time with it. Title 38 is the law, and if it says that 30% is the maximum, there is no recourse. That is it. That is all. I recommend you study title 38 very hard before you go any further with this.

It's an incredibly simple process.

Not to give the veterans administration any credit, but they really did make it easy.

It can all be done while overseas, no need to return back to the United States.

Send me a private message, I can walk you through the entire process.

Spend all sorts of money to come back from overseas to take a physical, have that appointment canceled at the last minute because of union training involving coffee and socializing, spend more money to come back for a second appointment, get seen, have the paperwork lost, spend more money to come back for a third appointment, get seen, get the paperwork in, then sit and wait for about 2.5 years for them to review your file, then file an appeal cuz they lowballed you.
*reference VA Pamphlet My Opinion

Having done this myself overseas, I can confirm the process is fairly straitforward.
Nowadays the process is made a lot easier by being completely online. You can send your notification of intent to file (this sets the effective date of your claim), and everything else by uploading the forms on ebenefits.va.gov.
If you are just looking for a re-assessment on a disability you already have service connection for, it's a lot easier because you don't have to establish "nexus." Doing the grunt-work before hand will speed things up (DBQ's, Buddy Statements, etc).
If your claim includes new disabilities or disabilties that were previously denied service connection, you need to get as much of the paperwork done beforehand that you can. Buddy Statements, medical records, and service records showing that you incurred the injury while in service are incredibly important. If you cannot prove that your disability is at least as likely as not due to your service, it will be denied.
For new claims, the most beneficial item (and also the hardest to get) is a letter from your doctor stating that in his or her opinion the the problem you are complaining about is at least as likely as not due to your active service, and giving the reasons why. If you can get one of those it's your golden ticket. Without it, you may have a battle on your hands.
Good luck, Major.
One last thing - consider getting the help of a Veteran Service Organization like DAV or the VFW. They have guys who will help you get it all pulled together and their services are free. Also note that it is illegal for someone to charge you for helping to file a new claim. Beware of huxters promising you the moon,

There are Veterans in Australia, I'm working on finding out what they do, once known I'll pass to you. Please email me in case I loose this thread. [login to see]

In the name of GOD....it's crazy when your in the states. You my friend have a very tall hill to climb

file formal complaint ...
notify your congress critter of the problem and refile for reclassification...
I tool mine from 30% to 70% by moving from Pittsburgh Pa to Clarksburg WVa Va Hospitals...

Your in New Zeland correct? Talk with the Embassy explain your situation and ask where they seek medical care. More than likely the doctor that sees the Ambassador along with other senior Americans has been trained in the States or has equivalent training that the VA will except.. Also you do have to fly all the way to the states, there is a regional office in the Philippines