The clearest signal in this week’s CMS NPI registry file is the concentration of records originally enumerated in 2026: 5,945 records bear that year, out of 10,245 records in the file. The snapshot also includes 5,273 new this week. These figures point to a rapidly changing provider landscape, but they are not a cumulative count of the field: the annual breakdown records original enumeration dates, and older providers can reappear when their records are updated.

California Leads, Florida Follows

California tops the state ranking with 1,803 records, or 18% of the file. Texas follows with 784, while Florida ranks third with 700. Michigan is close behind at 652, followed by Ohio with 419 and New York with 397. North Carolina, Colorado, Illinois and Washington also appear among the leading states, with counts ranging from 282 to 384.

The concentration reflects the scale of large state markets, but registry counts do not measure unmet need or service availability. Florida’s third-place position fits its substantial Medicaid ABA reimbursement program, high autism diagnosis rates and large population of school-age children receiving behavioral services. Its 348 new-this-year records put it fourth in that state ranking, behind California, Michigan and Texas. The top-state list is a view of leading markets, not a complete picture of provider access across the country.

RBTs Anchor Direct Service

RBT is the largest primary taxonomy, with 3,003 RBTs, or 29% of primary-taxonomy records. The primary BCBA count is 626 BCBAs, or 6%. These are taxonomy counts, not mutually exclusive shares of the workforce: providers can hold multiple taxonomies, and the file includes 2,025 providers with a second taxonomy and 833 with a third. The 105 dual BCBA-RBT providers fit a common career path, in which practitioners begin as RBTs and later earn board certification while retaining the earlier designation. RBTs are also underrepresented in federal registries compared with the actual workforce.

The gender breakdown is predominantly female: 6,808 female individuals, or 79%, compared with 1,355 male and 508 nonbinary individuals. That pattern is consistent with behavioral health’s overlap with caregiving and education-adjacent professions. The listed percentages are rounded, so they need not sum exactly to the total.

New Records, Older Histories

The enrollmentByYear field shows when providers were originally enumerated, not when they joined this week’s file. After 2026, the largest year counts are 2025, with 479, and 2024, with 468; the count for 2023 is 466. Older records, including those from 2005, appear because previously enrolled providers can have records updated this week. The recent-year concentration is consistent with sustained workforce entry and expansion amid rising demand since around 2019, though this snapshot alone cannot distinguish new practitioners from updated records.

Repeated Names Reveal Scale

EVERSIDE HEALTH, LLC appears 53 times, while MARATHON HEALTH, LLC appears 21 times. Kaiser Foundation Health Plan of Colorado appears 17 times, and OurHealth Physicians Group appears in entries with counts of 14 and 5; those differently styled names may refer to the same organization, but the registry does not establish that. Multiple entries can reflect separate sites or billing identities, rather than separate companies. Repetition signals organizational reach and administrative complexity; it is not, by itself, proof of ABA-market consolidation or a PE-backed chain’s footprint.

Taken together, the file shows a field adding practitioners and organizational records across major markets, with RBTs central to direct service and BCBAs providing clinical oversight. That expansion sits alongside a varied mix of counseling, social work and speech-language provider taxonomies. For clinics, the picture is one of rising supply and demand, but also the practical challenge of credentialing and billing across overlapping specialties and state-specific payer rules.