There's lots of confusion in this thread. Some of it generated by me. And some might be because the gov't has changed the rules somewhat. But probably I was just confused. Now I might be smarter. Or not. Here's what I think is correct:
IRP = Initial Residency Period = max time you get full funding. I'm trying to get away from the idea of a "clock" which is confusing.
For categorical programs: Very straightforward, your IRP = length of training to become board certified.
If you match into categorical IM, the IRP is 3 years.
If you match into categorical GS, the IRP is 5 years.
For Prelim/Advanced programs: Your IRP is the total time required for board eligibility. This would include the 1 yr prelim + advanced.
If you match into a prelim IM and Radiology, IRP is 4 years. 1 year IM prelim + 3 years of rads. Total = 4 years.
If you match into a prelim GS and Dermatology, IRP is 4 years. 1 year prelim GS + 3 years Derm = 4 years.
I have seen two different explanations for this, which might be part of the confusion:
- The IRP = total years of training. So in both examples above, IRP = 4 years.
- The IRP = Advanced years of training. But IRP does not start until advanced training (i.e. prelim year "does not count")
Both of these explanations yield the same result in the end. I believe #2 is actually correct, this only matters in the TY only option below.
Matching only to a Prelim: Depends on which
If you match only into prelim IM, IRP is 3 years. You use 1 year for your prelim IM. You have 2 years left, no matter what you do next. Getting a rads or derm spot doesn't change the IRP. You can complete IM with full funding. Almost everything else will leave you short.
If you match only into prelim GS, IRP is 5 years. Prelim GS counts as 1, you have 4 left.
Matching only to TY: IRP not set
If you match into a TY, your IRP is not set. When you end up in something else the next year, your IRP gets set by that.
This is where those two options above yield different results. If you continue into an Advanced program, it doesn't matter at all. But if you start what would have been a Categorical program, it does. Let's say you do a TY, then decide you want IM and need to start again as a PGY-1. If Option #1 is true, then your IRP is set at 3 years and the TY counts as one of those three -- two left. If Option #2 is true, then your IRP is set at 3 years but the TY doesn't count, so you still have 3 years. Not sure which is correct.
After the IRP:
After full funding, everyone then gets partial funding. Which is 50% of DME, and 100% of IME. Since in many places the IME>DME, this ends up being about 80% of what you'd get with full funding. So less, but nowhere near zero. Most fellowships are paid this way.
The exceptions:
There are a few carve outs for full funding: Geriatric fellowships, Preventive medicine fellowships. Child Neuro is 5 years (Peds + 2).
Combined programs are complicated. in general, the IRP is the shorter program + 1 year. But there are exceptions, and depends upon whether both programs count as Primary Care.
Non-accredited programs do not claim Medicare funds, so don't count for anything. Accredited = is ACGME accredited OR leads to possible ABMS certification.
Each institution has a maximum cap of residents they can claim, it was set in 1997. Above that, they can't claim any more. If a program is above their cap, then they will get zero funding for some residents and they can pick and choose which ones -- hence having less funding may not be an issue at all. But even if your institution doesn't count you on the Medicare report, it still "counts" towards your IRP.
Time residents spend on leave (that extends training), on research years, etc, do not count. You still have your full funding. Leave that doesn't extend training "counts".
If you want to read the Fed Register where this is all described:
42 CFR § 413.79 - Direct GME payments: Determination of the weighted number of FTE residents. | CFR | US Law | LII / Legal Information Institute (cornell.edu)
A very comprehensive slide show:
Microsoft PowerPoint - ADME Basic GME financing [Compatibility Mode] (aacom.org)