How to Segment Providers by Practice Size

Signal 1: NPI Provider Count at a Single Address

The simplest indicator of practice size is how many individual NPIs (Type 1) share the same practice address. If three physicians list the same street address in the NPI registry, that practice has at least three providers.

How to Calculate It

Download the NPPES file, filter to your target specialty, and group by practice address (after standardizing address formats). Count the distinct NPIs at each address. Then map each NPI to the count at their address.

This gives you a rough practice size indicator:

• 1 provider: Likely solo practice
• 2-5 providers: Small group practice
• 6-20 providers: Mid-size group practice
• 21-50 providers: Large group practice
• 50+: Health system, hospital-based, or large multi-specialty group

Limitations

NPI addresses are self-reported and not always current. Some providers list billing addresses instead of practice locations, which inflates the count at billing company addresses. Others list a corporate headquarters for a multi-location practice, making a 3-location practice look like a single large group. Use this signal as a starting point, not a definitive answer.

Signal 3: Multi-Location Indicators

Practices with multiple locations present a special challenge. A dermatology group with 4 locations and 12 total providers might look like four solo practices if you only count providers per address. Or it might look like a 12-provider group if all providers list the same headquarters address.

To identify multi-location practices:

• Shared organization name across addresses: If multiple addresses have the same or similar practice name, they are likely locations of the same organization.
• Shared phone number: Practices with multiple locations often route calls through the same main number.
• Web domain matching: All locations typically share the same website domain.
• Provider overlap: Physicians who practice at multiple locations will list different addresses on different days, creating a natural link between locations.

Multi-location identification is harder to automate than single-location counting, but it dramatically improves your practice size estimates. A 4-location practice with 3 providers per location is a 12-provider group, and it buys like one.

Signal 5: Practice Website Analysis

A practice's website is often the most accurate indicator of its current size and structure. The "Our Team" or "Our Providers" page lists the physicians, mid-levels, and key staff. Automated web scraping can extract provider counts from these pages with reasonable accuracy.

Website analysis also reveals practice characteristics that affect your sales approach:

• Service offerings: A practice listing 15 different services is likely larger and more diverse than one listing 3.
• Multiple office locations: Listed on the Contact page.
• Advanced services or equipment: Practices investing in expensive equipment (CT scanners, laser systems, surgical suites) tend to be larger and more established.
• Online scheduling: Practices using sophisticated scheduling and patient portal systems are typically larger groups with dedicated IT resources.

How Practice Size Should Change Your Sales Approach

Once you have practice size segments, use them to align your sales motion:

• Solo practices (1 provider): Short sales cycle. Decision-maker is the physician. Lead with ROI and simplicity. They do not have time for long demos or multi-stakeholder meetings.
• Small groups (2-10 providers): Decision may require partner consensus. Lead with operational efficiency and peer evidence. Ask who else needs to weigh in.
• Mid-size groups (11-50 providers): Formal buying process. Likely has an operations manager or administrator. Lead with scalability and integration. Expect a 2-4 month sales cycle.
• Large groups and health systems (50+ providers): Enterprise sale. Multiple stakeholders, procurement involvement, possibly RFP process. Lead with compliance, enterprise features, and executive ROI. Sales cycle of 6-12 months or more.

If your product is priced and built for small groups, filter out health systems before your reps waste time on accounts that will never close. If your product requires enterprise infrastructure, filter out solo practices. The segmentation saves time on both ends.

For teams that need practice size already calculated, Provyx includes practice size indicators in every data delivery. We combine NPI provider counts, organizational affiliations, and business data to classify practices into actionable size tiers.