Luna lists more Medicare physical therapists than Athletico or ATI

We set out to rank the big outpatient clinic chains, ATI, Athletico and the rest, by how many physical therapists they have in the CMS Doctors and Clinicians file. The largest group turned out to have no clinics. Luna, which sends physical therapists to patients' homes, has 2,329 therapists in the file across 25 state companies. Athletico has 1,999 and ATI 1,035.

The file lists 96,434 physical therapists enrolled in Medicare, and 86,479 of them bill through a group practice. Luna holds 2.7% of those.

The 15 largest groups

Source: ProfessionLens, November 2026, from the CMS Doctors and Clinicians National Downloadable File fetched 15 September 2026.

The second home visit company sits right behind Luna. FOX Rehabilitation, which treats older adults at home, has 1,935 therapists in 36 states. Agilitas, Legacy Healthcare Services and HealthPRO Heritage reach 9 to 24 states with a few hundred therapists each.

Many Luna therapists have another job

The last column is the part we did not expect. Of Luna's 2,329 therapists, 1,036 also bill Medicare through a different group, 44.5%. At Athletico it is 8.4% and at FOX, the other home visit company, 12.1%. Luna therapists show up most often at hospital systems and clinics: 69 also bill through King County Public Hospital District No. 2 in Washington, 44 through Swedish Health Services, 44 through Baylor College of Medicine, 41 through Emory Physical Therapy and 36 through Duke University Health System.

So many of the people in Luna's count also work at a hospital or a clinic. Counted by people, Luna is the largest group. The file has no hours, so we cannot say how many full time therapists that adds up to.

BenchMark Physical Therapy has a similar share, 45.8%. Its overlap runs mostly to Agilitas (181 therapists), Independent Physical Therapy of Georgia (87) and the Drayer Physical Therapy companies, so these groups share staff. The file does not say which company owns which, so we kept them apart.

By state

California is Luna's biggest state with 769 therapists, followed by Texas (271), Colorado (210), Georgia (166), Washington (161), Illinois (129) and Maryland (123). The full list is in the dataset.

How we counted

The CMS Doctors and Clinicians National Downloadable File has one row per clinician, practice address and group for clinicians enrolled in Medicare. We used the copy fetched on 15 September 2026 and kept clinicians whose primary specialty is physical therapist in private practice. A therapist counts once per group, by NPI. Groups are matched to a brand by the start of their legal name (for example every " Luna Care Physical Therapy" company is Luna, and "ATI Holdings" and "Athletic and Therapeutic Institute of ..." are ATI); groups we did not match stay under their own legal name. Brands we looked for and did not find under their own name, such as Upstream Rehabilitation, may bill through companies named after the clinics they own, so their counts are missing or split. Therapists who do not bill Medicare are not in the file, so these are not payroll counts. The table of the top 25 groups, Luna's count by state and the script output are in the dataset linked below.