Methodology: How MedSupplyDex Collects, Cleans, and Presents Supplier Data
Read how MedSupplyDex processes the public Medicare medical equipment supplier dataset, which fields it shows, and what its counts and percentages mean.
Where does the data come from?
All supplier listings come from a public Medicare medical equipment supplier file. Each record includes a business name, practice name, address, telephone number, supplier types, equipment categories, an assignment flag, an enrollment start date, and map coordinates. The current snapshot includes enrollment dates through November 5, 2026.
How are counts calculated?
A supplier is counted once in every place and category where it appears. The state total is the number of listings with a practice address in that state. A city total counts listings in that city after spelling and punctuation are normalized, so "St. Louis" and "ST LOUIS" are combined. Category counts show how many suppliers list a category, not how many items were sold.
What do the percentages mean?
The assignment rate is the share of listings flagged as accepting Medicare assignment. Concentration figures compare a place with the national average. For example, a category that appears in 12 percent of a state's listings but 8 percent of national listings is more concentrated there. Rankings use the same counts shown in the tables.
Which pages exist and why?
A city receives its own page only when it has at least 15 supplier listings, because smaller places would not support a useful page. Suppliers in smaller places appear on the state page and in the ZIP code lookup. Equipment categories need at least 100 listings to receive a page. Territories with very few listings are combined on one page.
How often is the site updated?
The site is rebuilt when a new version of the dataset is released. Updates can change counts, rankings, and recent enrollment lists. Supplier details can change between releases, so call before you visit.
What are the limits?
The dataset does not show prices, stock, hours, or service quality. A listing shows that a business is enrolled for a category, not that it has a specific item available today. Use the guide on verifying suppliers before sharing personal information.
How are the city comparisons and ranked lists calculated?
For each city page we divide the city count by its total listings to get shares: assignment rate, pharmacy share, dedicated medical supply company share, and the share enrolled since January 1, 2025. We compute the same shares for the state and for the whole U.S. and show the three side by side. Ranks compare a city only with other cities in the same state that have a page. Ranked city lists include only cities with at least 50 listings. Where a city has fewer than 30 listings, the page notes that one supplier moves a percentage by several points.
How can you confirm a listing with an official source?
Use Medicare's official tool for finding medical equipment suppliers or call 1-800-MEDICARE. The CMS DMEPOS information center explains supplier enrollment and billing rules. Our data is a snapshot and can differ from the live Medicare record.
What has changed on the site?
November 11, 2026: added city comparison sections, three ranked city lists, the supplier shortlist and checklist tools, new guides, source lists on guides, and the editorial policy.