A Testing Partner for San Francisco Longevity Practices

Custom Fit works with physicians, longevity clinics, and other providers seeking in-person testing and performance support in San Francisco. Partnership options include referral-based testing, coordinated client or patient support, and programs tailored to a practice's needs.
The starting point is the question your practice wants to answer and the information you want back. Custom Fit can provide testing and written reports while your practice maintains clinical leadership.
Choose the assessment that fits the referral
The testing services available to discuss with Custom Fit include:
- DEXA body composition: total and regional fat and lean tissue measurements, with results reviewed by a Registered Dietitian or Exercise Physiologist.
- VO₂ max testing: aerobic-fitness assessment and a report that includes training-zone information.
- Advanced bloodwork: blood draws and laboratory panels, with the specific panel confirmed for the referral.
- Nutrition-focused genetic testing: Nutrigenomix insights related to nutrition and fitness tendencies.
- 3D gait analysis: assessment of walking or running mechanics.
These services answer different questions. A body-composition scan is not a direct strength test, and a fitness assessment is not a substitute for a medical evaluation. Custom Fit's DEXA service is not medical osteoporosis screening.
Agree on scheduling and reporting before the first patient
Custom Fit accepts direct physician referrals. Patients may book directly, or a practice can coordinate scheduling through the team. The partnership discussion is an opportunity to agree on the referral information, appointment preparation, report recipients, and follow-up arrangements.
Written reports are available for referring clinicians. Confirm the patient's consent and the method for transferring results before assuming that information will be sent automatically. A clear process helps the patient understand who will explain the findings and whom to contact with questions.
For practices considering aerobic-fitness testing, the VO₂ max page includes a sample report and preparation information. The DEXA page also provides a sample body-composition report. Reviewing those examples can help your practice decide whether the output matches its needs.
Keep service locations specific
DEXA testing takes place at 323 Octavia Street in Hayes Valley, San Francisco. Custom Fit also lists VO₂ max appointments at that address. Confirm the location and appointment arrangements for every service included in a referral; services are not interchangeable across studios.
Timing depends on the tests selected and availability. A testing appointment and a complete set of results are different milestones, especially when bloodwork or genetic testing is included. The team can explain the expected sequence for the services your practice requests.
Where training and nutrition can fit
Custom Fit offers personal training and Registered Dietitian nutrition coaching in addition to testing. When a patient wants support with the next phase of their fitness or nutrition plan, those services can be discussed within the boundaries set by the referring provider.
A useful handoff identifies the patient's goals, any relevant clinical guidance, and the role each professional will play. Testing, coaching, and medical care are related but distinct services; the partnership can be designed around the support your practice and patients actually need.
Questions for a potential partnership
Must our practice refer patients for a complete package?
No. Custom Fit offers referral-based testing and custom partnership models. Discuss the individual services and reporting you need with the team.
Can we review sample reports before referring?
Yes. DEXA and VO₂ max sample reports are available on the respective service pages, and the team can discuss how reports fit into your practice's workflow.
Contact Custom Fit about a medical or longevity partnership to discuss testing, reports, and a referral process for your clients.