ELI5 Guide to SSP Pricing
This page explains how SSP pricing works in plain language. No code, no SQL -- just the concepts.
What is an SSP?
SSP stands for Standard Service Package. Think of it like a meal at a restaurant: when you order "steak dinner," you expect the steak, a side, maybe a salad, and the use of the table and kitchen. You don't order each of those separately.
An SSP works the same way for medical procedures. When a patient gets a colonoscopy, the bill doesn't just include the colonoscopy itself -- it includes the anesthesia, the pathology lab work on any tissue samples, the facility room, the supplies, and so on. An SSP groups all of those related services together under one umbrella so we can talk about the total expected price of "a colonoscopy" rather than dozens of individual billing codes.
Each SSP has an anchor code -- the main procedure that defines it (e.g., CPT code 45385 for a colonoscopy with polyp removal). Everything else in the package is a supporting service that typically shows up on the same claim.
How are prices calculated?
Every SSP has two major price components, just like a hospital bill has two parts: one from the hospital and one from the doctors.
Institutional (facility) price
This is what the hospital charges for providing the room, equipment, nursing staff, supplies, and overhead. Think of it as the "venue fee." Whether it is an operating room for surgery or a GI suite for a colonoscopy, the facility charges a bundled rate for everything it provides.
For outpatient procedures, the facility price is based on the APC (Ambulatory Payment Classification) rate. For inpatient stays, it is based on the MS-DRG (Diagnosis Related Group) rate.
Professional prices
These are the fees charged by each individual doctor or provider involved in the procedure. Different specialists contribute different pieces:
| Provider | What they do | How the fee is set |
|---|---|---|
| Primary surgeon | The main doctor performing the procedure | Full professional fee based on the CPT code |
| Anesthesiologist | Manages sedation and monitors the patient | 50% of the full anesthesia fee (splits with CRNA) |
| CRNA (nurse anesthetist) | Assists with or delivers anesthesia under supervision | 50% of the full anesthesia fee |
| Pathologist | Analyzes tissue samples in the lab | Separate lab/path fee |
| Radiologist | Reads any imaging (X-rays, CT scans, etc.) | Separate radiology fee |
| Assistant surgeon | Helps the primary surgeon during the procedure | 16% of the primary surgeon's fee |
The anesthesiologist and CRNA split is worth noting: when a CRNA is supervised by an anesthesiologist, CMS rules say each gets 50% of the total anesthesia fee. So if the full anesthesia fee is 500 and the CRNA gets $500. The total professional cost includes both.
The assistant surgeon factor (16%) and assistant non-surgeon factor (13.6%) come from CMS payment policy -- these are standard percentages of the primary surgeon's fee.
What are carve-outs?
Some items are so expensive and variable that it doesn't make sense to lump them into the base facility price. These are carve-outs -- they get priced separately and added on top.
The two main categories are:
-
Implants and devices -- things like pacemakers, artificial joints, spinal hardware, or cochlear implants. A hip replacement implant alone can cost thousands of dollars, and the specific implant chosen varies widely.
-
High-cost drugs -- specialty medications administered during the procedure (e.g., certain biologics or chemotherapy agents). These are identified by drug revenue codes and high average charges.
Think of carve-outs like adding lobster to that restaurant meal -- it is priced separately because its cost varies too much to include in the fixed dinner price.
What are sub-categories?
Not every colonoscopy is the same. A routine screening colonoscopy is simpler (and cheaper) than one where the doctor finds and removes multiple polyps, or one where there are complications.
Sub-categories capture these severity levels within a single SSP. They are labeled with numbers starting at 0:
- Sub-category 0 = the base or least complex version
- Sub-category 1 = moderate complexity
- Sub-category 2 = higher complexity
- And so on
For inpatient SSPs, sub-categories are determined by the RII (Relative Intensity Index) system, which uses claims data to score how resource-intensive each case was. The system groups cases into tiers and assigns a multiplier to each tier. A multiplier of 1.0 means "average intensity." A multiplier greater than 1.0 means "more expensive than average," and less than 1.0 means "less expensive."
For outpatient SSPs, sub-categories usually map directly to different CPT codes (e.g., colonoscopy with biopsy vs. colonoscopy with polyp removal).
What are relative weights?
Raw dollar prices are hard to compare across different procedures. Is a 50,000 heart surgery?
Relative weights solve this by converting prices into a dimensionless number. We divide every price by a fixed base rate of $500 to get the weight.
| Example | Price | Weight |
|---|---|---|
| Simple colonoscopy | $2,500 | 5.0 |
| Complex colonoscopy | $4,000 | 8.0 |
| Knee replacement | $15,000 | 30.0 |
Now you can instantly see that the knee replacement is 6x more resource-intensive than the simple colonoscopy, without worrying about dollar amounts that shift with inflation or contract negotiations.
Relative weights are the currency that contracts and benchmarks use -- the
actual dollar payment is weight x negotiated base rate.
What is the NCCI group?
When building the list of professional services included in an SSP, some procedure codes are alternatives to each other -- you would only ever bill one of them on a given encounter, not both. For example, two different anesthesia codes might both apply to a colonoscopy, but the anesthesiologist only uses one.
The NCCI (National Correct Coding Initiative) edits from CMS tell us which codes are mutually exclusive. We use these edits to cluster codes into NCCI groups:
- Codes in the same group are alternatives (pick one). Their prices are averaged (volume-weighted), not summed.
- Codes in different groups can be billed together. Their prices are summed.
This prevents double-counting. Without NCCI grouping, we might accidentally add the price of two mutually exclusive anesthesia codes, overstating the true cost.
What is an association rate?
Not every service in an SSP happens every single time the procedure is performed. For example, a pathologist is only needed when tissue is actually removed -- which might be 80% of colonoscopies but not 100%.
The association rate measures how often a particular service appears relative to the anchor procedure:
- 1.0 = this service appears at the same frequency as the anchor (i.e., every time)
- 0.8 = this service appears on 80% of encounters
- 0.3 = this service appears on 30% of encounters (our minimum threshold)
Association rates come from actual claims data. We look at real hospital encounters for each anchor code and count how often each related service shows up. Services that appear less than 30% of the time are excluded as too rare to be considered part of the standard package.
For revenue code families on the institutional side, the association rate is normalized so the anchor code's own revenue code family = 1.0, and other families are measured relative to that.
How are combo SSPs priced?
Sometimes two procedures are commonly done together in a single visit -- like a colonoscopy and an EGD (upper endoscopy). Rather than pricing them as two separate SSPs, we create a combo SSP that accounts for the overlap.
The pricing follows the multiple procedure reduction rule, which mirrors how insurers actually pay when two procedures happen in the same session:
- 100% of the more expensive procedure (the "primary")
- 50% of the less expensive procedure (the "secondary")
Which one is primary vs. secondary is determined per provider by comparing facility prices. If Provider A's colonoscopy costs more than their EGD, the colonoscopy is primary for that provider.
This 50% discount on the secondary procedure reflects the reality that the facility, anesthesia, and setup costs overlap significantly when two procedures are done in one visit. You don't need two operating rooms or two rounds of anesthesia.
Combo SSPs have a single sub-category (0) and are identified by the segment 2
in their name (e.g., GA.2.colonoscopy_and_egd).