> ## Documentation Index
> Fetch the complete documentation index at: https://mso.getlemma.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Welcome to the MSO-PC Wiki

> An open, cited reference for building and running MSO-PC healthcare businesses in the United States, from incorporation to your ten-thousandth remittance.

The MSO-PC Wiki is a free reference for anyone building or operating a **management services organization (MSO)** paired with a **professional corporation (PC)** in US healthcare and law. It covers the whole span of the problem: why the structure exists, how to form it, how to get paid, and what every code, contract, and state rule actually means.

<Note>
  The MSO-PC wiki only covers healthcare MSOs. Healthcare lawyers, we see you, and yes, you're welcome to forward this to your clients. Unfortunately for our lawyer friends, we do not document the MSO structure for businesses buying law firms.
</Note>

## What this site covers

Healthcare is the only major US industry where the person who owns the business often legally cannot be the person who owns the *practice*. That single constraint, the corporate practice of medicine doctrine, produces the MSO-PC structure, and the MSO-PC structure produces a long tail of consequences: two sets of books, one professional entity per state, payer enrollments that don't travel, management fees that have to be simultaneously fair-market-value and investable, and a banking setup that no generalist bank understands.

This wiki documents all of it, at four levels of depth:

<CardGroup cols={2}>
  <Card title="Start Here" icon="graduation-cap" href="/start/what-is-an-mso-pc">
    **Learn.** Guided, sequential tutorials with a guaranteed outcome. Start with a fictional practice and go from idea to first paid claim.
  </Card>

  <Card title="Guides" icon="list-check" href="/guides/formation/form-a-pc">
    **Do.** Task recipes for a competent reader with a specific goal: form a PLLC, enroll in Medicare, fight a chargeback, set a management fee.
  </Card>

  <Card title="Concepts" icon="lightbulb" href="/concepts/model/cpom">
    **Understand.** The mental models and the *why*: CPOM, fee-splitting, the claim lifecycle, where MSO profit actually lives.
  </Card>

  <Card title="Reference" icon="table-list" href="/reference/appendix/glossary">
    **Look up.** Cited: state CPOM pages, payer profiles, CARC codes, X12 anatomy, escheatment tables.
  </Card>
</CardGroup>

## Who this is for

| If you are…                                     | Start at                                                                                             |
| ----------------------------------------------- | ---------------------------------------------------------------------------------------------------- |
| A founder with no healthcare background         | [What is an MSO-PC?](/start/what-is-an-mso-pc)                                                       |
| A clinician being asked to own a "friendly PC"  | [The friendly PC, explained](/concepts/model/the-friendly-pc)                                        |
| An operator or biller doing the work day to day | [Guides](/guides/billing/work-the-denial-queue) and [Reference](/reference/edi/denial-code-playbook) |

## How we source

Every legal claim on this site carries a citation to a primary source: a statute, a regulation, a court opinion, an agency manual, or a payer's own documentation. Case law gets full citations. Legislation gets bill numbers and effective dates. Where a rule is genuinely unsettled (and much of CPOM is), we say so rather than manufacturing false precision.

## Who maintains the MSO-PC Wiki

The MSO-PC Wiki is a neutral resource maintained by [Lemma](/reference/appendix/about-lemma) who builds healthcare-focused banking for MSO-PC groups. Lemma's healthcare banking product is documented in [docs.getlemma.com](http://docs.getlemma.com).

See [How we keep this current](/reference/appendix/how-we-keep-this-current) for our sourcing standards and how to report an error.

## Next

<Card title="What is an MSO-PC?" icon="arrow-right" href="/start/what-is-an-mso-pc">
  The five-minute orientation: two entities, one business, and the doctrine that splits them.
</Card>


## Related topics

- [How to use this wiki](/start/how-to-use-this-wiki.md)
- [About Lemma (who maintains this)](/reference/appendix/about-lemma.md)
- [The friendly PC, explained](/concepts/model/the-friendly-pc.md)
- [Alternatives to MSO-PC](/concepts/model/alternatives-to-mso-pc.md)
- [Why the MSO-PC structure exists](/concepts/model/why-mso-pc-exists.md)