Yes. Your county is one of a short list of things a small-group rate is allowed to turn on, and Indiana is divided into rating areas along county lines. The county that counts is the one your principal business address sits in, not the counties your employees drive in from each morning. That single address does the work for the whole payroll.
Indiana splits into rating areas the same way it splits into counties
The Centers for Medicare and Medicaid Services publishes the geographic rating areas each state uses, and the Indiana table is built on one column: county. It lists 17 areas and assigns all 92 Indiana counties across them, so there is no county in the state without an area and no area without counties.
The detail that makes this simple to use is a blank one. Some states subdivide a county by three-digit zip code, and the table has a column for it. On the Indiana rows that column is empty from top to bottom. No Indiana county is split between two areas, which means the answer to “which area are we in” never depends on which side of a county your building is on. Name the county and you have the area.
The rule points at your principal business address
The rating area is federal, not state-drawn, and the rule naming it says exactly which address to read. Under 45 CFR 147.102, an issuer sets the rating area “in the small group market, using the group policyholder’s principal business address.”
The group policyholder is your business. In the small group market, employees get coverage through a plan the employer maintains, and the employer is the party the policy is issued to — the distinction is written into the federal definitions at 45 CFR 144.103. So the rating area attaches to the company, once, rather than being worked out person by person.
The same subparagraph carries fallbacks for the cases that are not tidy. It names the registered address, then the in-state location where the greatest number of employees work, and then, for a network plan whose service area does not reach that address, the in-service-area location where the most employees work, and failing that, where the most employees live. An employer with two Indiana sites does not get two rating areas. It gets one, chosen by that order.
Johnson County sits in one area and Marion County in another
This is the part that surprises people who assume a metro area is one market. Marion County, which holds Indianapolis, is in area 10. Hamilton County, which holds Noblesville, is in area 10 as well. Johnson County, immediately south of Marion, is in area 13, grouped with Brown, Lawrence, Monroe and Owen counties.
Three neighboring counties, one commuting pattern, two rating areas. A business on the south side of the line and a business on the north side of it are reading different rows of the same federal table, even though their employees may shop at the same places and use the same hospitals. Nothing about that is unusual or irregular — it is simply how the map was drawn, and it is why two Indiana employers with similar payrolls and the same plan design can be quoted off different geography.
Real-World Scenario: A print shop opened a second crew at a site north of the county line and assumed the group would now be quoted on the Indianapolis market, because that is where most of the new hires live. The issuer never asked where the crew lives. It asked for the address the business is run from, matched that county to the federal table, and used the same rating area it had used the year before. The owner had prepared at length for a conversation the rule had already settled.
Allen County is an area with nobody else in it
Allen County, which holds Fort Wayne, is area 4 — and it is the only Indiana area with a single county in it. Fort Wayne is rated alone. Everywhere else in the state, a county shares its area with neighbors; there, the area and the county are the same shape.
At the other end of the state, Vanderburgh County, which holds Evansville, is area 17. The point of naming these is not that one is better placed than another. It is that the areas are not uniform in size or in how many counties they contain, so you cannot reason your way to your own area from a map of Indiana’s regions, its metro areas or its highway corridors. You read the county off the table.
The rating area is one item on a closed federal list
Geography matters because the federal rule lets it matter, and the same rule is what keeps most other things out. 45 CFR 147.102 permits an issuer in the small group market to vary a rate by whether the coverage is for an individual or a family, by rating area, by age, and by tobacco use. Then it closes the door: “the rate must not vary with respect to the particular plan or coverage involved by any other factor not described in paragraph (a)(1) of this section.”
Read that list for what is missing. Your employees’ health history is not on it. Last year’s claims are not on it. Your industry is not on it. Age is on the list, and the rule caps how far a rate may move on it — we name the factor and leave the cap to the rule itself. Rating area is on the list, and it is the only place your address enters the arithmetic at all. If you want the wider picture of how a group plan is built and priced, our group health page walks through the rest of it, and the Indiana page carries what this state adds on top.
Two employers, one state, and different inputs going into the quote
Put two Indiana employers side by side with the same plan design and the same number of people, and the quotes can still differ. Rating area is one reason: different counties, different rows. Age mix is another, because age is a permitted factor and two payrolls are rarely the same age. Whether people are enrolling single or with family is a third.
What the rating area is not is a price. The CMS table draws boundaries — counties on the left, an area number on the right, nothing else. It tells an issuer which of its own rows to read for your group. It does not tell you what is written on that row, and neither do we: this agency publishes no premium of its own, for any county, in any year. The number comes out of a quote built on your actual census, which is the same discipline we apply whether you are setting up a first plan or shopping a renewal.
What the table does not settle about which plan years it covers
Being straight about the limits of a source is part of using it. The CMS rating-area page carries one date stamp and does not state which plan years its county assignments govern. We therefore cite it as the rating-area table CMS publishes for Indiana, and not as a statement about any particular year, and we check the assignment again rather than assuming last year’s reading still holds.
One more habit worth borrowing: when we read a county list off a federal page, we check the names against Indiana’s own spelling instead of transcribing them. A transcription error in a county name travels quietly, and the reader who finds it has no way of knowing whether the error is in the copy or in the underlying assignment.
It is also worth keeping the two authorities straight in your head, because employers often collapse them into one. The rating-area rule and the closed list of permitted factors are federal. The company quoting you is licensed and supervised in this state by the Indiana Department of Insurance. Both things are true at the same time, and neither one makes the other go away.
Bring the address you actually operate from
The practical version of everything above fits in a sentence: the address you put on the application is the address that sets your rating area, so it should be the address the business is genuinely run from.
Three things are worth saying out loud before anyone quotes you. If your registered address is a lawyer’s office or an accountant’s, say so, because the rule has an order and someone should apply it deliberately rather than by accident. If you have more than one Indiana location, say which one carries the most employees. And if you are about to move, say when, because the county on the new lease is the one the next application reads.
If you want us to run it, send the address and the census and we will tell you which area you are in before we talk about anything else. You can start a quote, get in touch directly, or read who we are first. The same approach applies to the rest of the package — dental, vision, life and disability each have their own page — and if Indiana is not the only state you employ people in, the states we are licensed in are listed together.
The bottom line
Indiana’s rating areas are county-shaped, and the county that applies to your group is the one your principal business address sits in — not the counties your employees commute from.
Frequently asked questions
Do the counties our employees live in feed into the rating area?
No. The federal rule sets the rating area in the small group market from the group policyholder’s principal business address, which is your business address, not each employee’s home address. Where your people live can matter for whether a network works for them day to day, but it is not what places your group on the rating map. One address does that job for the whole census.
Can one Indiana county be split between two rating areas?
Not on the table CMS publishes for Indiana. Every county on it is assigned to exactly one area, and the three-digit zip code column that some states use to subdivide a county is blank on every Indiana row. That is why a county name is enough to answer the question here, and why nobody needs to work out which side of a county a building sits on.
Are Indianapolis and Greenwood employers on the same area of the map?
It depends on the county each business address sits in. Marion County, where Indianapolis sits, is in area 10, and so is Hamilton County to its north. Johnson County, directly south of Marion, is in area 13 with Brown, Lawrence, Monroe and Owen counties. Two employers a short drive apart can therefore sit on two different rows of the same federal table.
Does the CMS table tell us what a plan in our area costs?
It does not. The rating area table is a list of counties and the area each one belongs to, and it carries no prices at all. It tells you which row of an issuer’s rate structure your group lands on; it does not tell you what is written on that row. Only a quote built on your own census answers that.
Which address is used if our registered address is not where we actually work?
The federal rule has an order. It starts with the group policyholder’s principal business address, then names the registered address, then the in-state location where the greatest number of employees work. For a network plan whose service area does not reach that address, it falls back to the in-service-area location where the most employees work, and then to where the most employees live.
About the author
Nate Jones, CPCU, is the founder of Wexford Insurance and Wexford Health Insurance, an independent agency placing small-business group benefits in 9 states. Nate reads the federal rating-factor rule and the CMS county assignments before quoting an Indiana group, because the address on the application is what fixes the rating area and employers rarely know that. Start with the Wexford Health Insurance quote form.