About the data
Every listing on this site starts from one public federal file, checked where we can against the state's own list of who is currently licensed. This page says which sources, what we keep, and what none of them can tell you.
The source
The National Plan and Provider Enumeration System (NPPES) is the federal system that issues National Provider Identifiers, the ID numbers health care providers use when they bill. The Centers for Medicare & Medicaid Services publishes the whole file every month, and anyone can download it. This site uses the file with data through September 13, 2026.
Town populations and locations come from the Census Bureau: its city and town population estimates for July 1, 2025, and its Gazetteer file of place coordinates.
How we check who still holds a license
The federal record never gets taken down when a chiropractor stops practicing, so its age alone cannot say who is still open. Where a state publishes its own license roster, we check each chiropractor against it directly and show everyone that roster lists as currently licensed, however old their federal record is. For Iowa, that roster is the Bureau of Professional Licensure's public list, which the state updates daily and anyone can read at dial.iowa.gov. We do not print a license number on any page, only whether the license is current.
Most federal records already carry their own Iowa license number, which we match directly. A smaller number we match by name instead. A few records match neither; those, and every business record, since a business is not itself licensed, fall back to the older rule: the record was updated or re-certified recently enough on its own.
What we keep
- Records whose main classification in the file is chiropractor.
- Records that are active. A deactivated identifier is left out.
- For a chiropractor, a current license where the state publishes one to check; otherwise, and for every business record, the record was updated or re-certified in the last 3 years. The file never removes a provider who retires without telling anyone, so an old, unlicensed-or-unmatched record may describe an office that closed. We would rather miss an office than send you to an empty building.
- Offices in incorporated towns of fewer than 10,000 people.
Those rules cut a lot. An office that has sat at the same address for fifteen years may never have touched its federal record, and without a license match it will be missing here. Each town page says how many addresses were left out for that reason.
Iowa, in numbers
- 3,412 chiropractor records in the file give an address in Iowa.
- Checked against Iowa's public license roster, current as of October 6, 2026: 2,104 of 2,121 individual chiropractor records matched a roster entry, and 1,589 of those hold a current license today. 17 records could not be matched and fall back to the record-age rule below.
- 1,787 records in all (chiropractors with a current license, plus businesses and unmatched chiropractors updated or re-certified on or after September 13, 2023) are current.
- 248 towns of fewer than 10,000 people have at least one current record. Each has a page.
- Those pages list 509 offices and name 598 chiropractors.
- 22 addresses where a chiropractor's own address shared a practice's phone number in the same town: we show that chiropractor under the practice's listing instead of printing the second address.
- 40 more small towns appear in the file only on older records. They have no page.
How offices are put together
The file has separate records for a business and for each chiropractor. We put records with the same street address in one listing, under the business name when there is one. Names, addresses, and phone numbers are shown as the record gives them. The only change is tidying the capital letters, because the file is mostly typed in upper case.
When a chiropractor lists a town as an additional location, the listing says so and names the town of the main address. When a chiropractor's own address is a different one from their practice's, but shares the practice's phone number in the same town, we show them under the practice's listing instead of printing that second address, since it is usually a home rather than a second office.
What the record does not hold
Opening hours, prices, which insurance an office takes, and whether it is taking new patients. Call the office to ask. For a state we do not yet check a license roster for, use that state's own lookup, linked from the first visit guide.
Distances
Distances between towns are straight lines between the Census Bureau's center points for each town, rounded to the mile. The drive is longer.
How often it changes
The federal file comes out monthly, a license roster we check is pulled fresh at the same time, and the pages are rebuilt from both. A change a provider makes to their own record, or to their license, shows up here after the next rebuild.