Market entry sequencing: where to launch first.

When an organization is entering a new state or expanding into a new region, the question is usually framed as a market question: which market should we enter? The underlying decision is actually more specific than that. Markets are made up of counties, and the county-level adequacy requirements, provider landscapes, and competitive dynamics vary enough that the right first county in a market can be significantly different from the obvious one.

The wrong first county costs you more than the obvious time and budget. It sets a template for how you build — the staffing model, the outreach relationships, the contracting approach — that may not transfer well when you expand into the next county. The right first county is a place where you can build a model that scales.

The adequacy gap framework

The first dimension to evaluate in county sequencing is adequacy feasibility — can you actually build an adequate network in this county? For some counties, especially rural frontier counties, the answer is: technically, with exceptions, after a significant amount of work. For others, the provider supply is sufficient and the main challenge is contracting, not recruitment.

We build a county-level adequacy gap analysis before making sequencing recommendations. For each county in the target footprint:

• Map the required providers by specialty against the available provider supply within the time-distance standard.
• Identify which counties have adequate supply to meet the standard, which require exceptions, and which have adequacy challenges that can only be resolved with telehealth provisions.
• Flag counties where the available provider supply is controlled by a single health system — because a single health system contracting negotiation determines your adequacy for that county.

Counties with straightforward adequacy paths and diverse provider supply are lower-risk first entries. Counties where adequacy depends on a single health system negotiation should not be your first county unless you have an existing relationship with that system.

Existing relationships matter more than size

Organizations often want to start in the largest county — the most members, the highest visibility, the most premium volume. But the largest county is also usually the most competitive, the most complex to credential at volume, and the most expensive to build. It may not be the right first county.

A mid-size county where the organization already has relationships with major provider groups — through a hospital relationship, through a prior contracting history, through a physician champion who can make introductions — is almost always a better first county than the largest county with no existing relationships. You can build faster, at lower cost, and the model you develop can be scaled to the larger markets.

The competitive landscape question

Provider contracting leverage is partly a function of who else is already in the market. In a county with five competing MA plans, the providers have multiple options and your contracting leverage is limited. In a county with one or two existing plans — or where existing plans have had service quality issues — your value proposition is more compelling.

This is not about avoiding competition. It is about understanding where your network value proposition is strongest. A plan entering a county where members have limited options and where existing plan service quality is poor can recruit providers based on member volume and on being a better partner. That is a real competitive advantage.

Your first county sets the template. Build where you can build well, and the expansion counties get easier.

Regulatory sequencing

For Medicare Advantage expansion, CMS service area expansion requests are filed as part of the annual application cycle. You can add counties to an approved service area in any given year, but you have to file the expansion request and submit a network for the new counties on the same timeline as the main application.

This means you cannot decide in September that you want to add a county to your service area for January 1. The decision to add counties needs to be made early in the preceding year — in Q1 at the latest — to give yourself the build time to develop an adequate network before the application deadline.

Service area sequencing is therefore not just a strategic question but a calendar question. The counties you decide to enter in a given year need to be decided before the network build starts, not while it is running.