Every listing starts with public information: the company’s own website, its public listings, and publicly available business records. Our research team confirms each company is a real, operating firm with a working website before it enters the directory. The current inventory of 142 companies was verified on September 22, 2026.

For each company we record: the firm’s name, its website, its location where publicly stated, a short description of its services in the firm’s own terms, and the specialties it publicly serves. Descriptions on this site summarize what each company says about itself — we don’t interview firms, audit their operations, or test their performance.

At launch, every company listing is unclaimed. That means no firm has reviewed or edited its own profile yet. Claimed profiles are marked as claimed, and what a claimed firm can and cannot change is governed by this same methodology.

A company is listed when four things are true:

1. It is a real, operating firm with a working public website.
2. It sells medical billing or RCM services — to practices, or to other billing organizations where that’s the firm’s actual business model.
3. At least one public fact about the firm is attributable — to the firm’s own site or to a public business listing.
4. It is not a duplicate of a company already listed.

A company is removed if we can no longer verify it exists, its website stops resolving, or we confirm that information on its listing is wrong and the firm doesn’t correct it.

Specialty tags (like Behavioral Health or Dental) are assigned from the company’s own public materials. A specialty tag must be supported by the company’s website or public listings — we don’t tag a firm for a specialty based on a single passing mention. Where a firm’s service is software with attached billing services rather than a standalone billing service, we label that engagement model on the listing so buyers can tell the difference.

The default order is alphabetical. Companies appear A to Z by name. There is no editorial ranking behind it — alphabetical is the only order that requires us to claim nothing about quality.

Search and filters change what you see, not where anyone “ranks”: filtering by specialty, searching by name, or narrowing by location shows a subset of the same list, still alphabetical.

Sponsored placements are labeled separately and never affect editorial inclusion or default order. When a company buys a sponsored placement (labeled “Featured” on this site), it appears in a clearly labeled sponsored section with its own disclosure — never silently promoted inside the alphabetical list.

Every fact on a listing comes from a source, and the listing shows which kind of source it is:

• Verified — we confirmed the fact against a public source (for example, the firm’s own website) on the date shown.
• Self-described — the firm’s own statement about itself, summarized or quoted with the date we recorded it. We present it as their claim, not ours.
• Not reported — we don’t have confirmed information, so the field says “Not reported” instead of showing a blank, a zero, or a guess.

A field that says “Not reported” is exactly that. It is not a negative judgment about the firm, and we never fill gaps by inference.

Some of the information buyers care most about can’t be verified from public sources — and guessing would be worse than silence. We don’t publish it unless we can confirm it. Here is what’s missing today, why, and the question to put to each vendor directly:

If a firm publishes verifiable facts in any of these areas and wants them shown, the path is the claim process below — the information still has to be checkable, and it will be labeled as the firm’s own statement.

BillingFirms is free for buyers. The planned revenue model is sponsored placements sold to companies. The rules:

1. Sponsorship is sold as a labeled placement, separate from the directory list itself.
2. Sponsored placements are labeled separately and never affect editorial inclusion or default order. A company that never pays is listed on exactly the same terms as one that does.
3. Sponsored sections carry their own disclosure, on the page, at the placement.
4. We don’t sell removal of negative information (we don’t publish negative information in the first place), and we don’t sell “editor’s choice,” “top rated,” or any badge that implies an editorial judgment we didn’t make.
5. Any future sponsored product that works differently from the four rules above gets described on this page, in a dated change-log entry, before it goes on sale.

At publish, there are no sponsored placements on the site. When the first one goes live, this section will carry a dated note saying so.

If you work for a listed company: you can claim your listing through the “For firms” flow. Claiming lets you confirm or update your own public facts (website, location, service description, specialties) — it does not let a firm add unverifiable performance claims, ratings, or pricing terms, and claimed profiles stay subject to the same source rules as every other listing.

If something on a listing is wrong: tell us. Email jon@pillaraiagency.com with the listing name and what’s incorrect. We check the claim against public sources, fix what’s confirmed, and correct or remove what isn’t.

If you believe your company should not be listed: we’ll review removal requests from firms with a verifiable connection to the company.

We re-verify the full inventory on a quarterly cycle, and we fix confirmed errors as they’re reported, between cycles.

Material changes to this methodology are recorded here, newest first, before or with the change going live.