Testosterone therapy and men's health for Tustin. Nine miles up the 5 — an hour with the doctor, not fifteen minutes.
Castellano Health Institute serves Tustin men a 9-mile drive up the 5 — same doctor every visit, full in-house labs, and a first consult that runs a full hour because that's what a real workup takes.
Garden Grove · Mon–Fri 9 AM – 5 PM
The Tustin pattern Dr. Castellano sees most.
The Tustin patient picture is the mid-career professional — office and tech-park jobs around Tustin Legacy and The District, or the daily commute down the 5 into the Irvine employment corridor. Salaried, scheduled, forty to fifty-five. He keeps his annual physical, and every year it comes back “fine.” He doesn’t feel fine. Slower recovery, a softer middle, focus that takes more coffee to hold, and a drive that’s quietly gone missing.
The gap between “your labs are normal” and “you feel right” is usually a depth-of-workup gap. A standard screening panel checks a handful of boxes against a wide reference range. Dr. Castellano runs the full picture — testosterone with its related markers, thyroid, metabolic panel — and evaluates the numbers against your symptoms and your own baseline, not just the population range. That’s the read a fifteen-minute slot can’t do, and it’s the reason the first consult here runs a full hour.
What a wide panel sees that an annual physical doesn’t.
The reason the yearly physical keeps coming back “fine” is that a standard screen is narrow by design — a total testosterone, a basic metabolic panel, checked against a population-wide reference range. A man can sit squarely “in range” and still have a low free fraction, an early thyroid shift, or a fasting insulin that’s been climbing for years. The number passes; the picture doesn’t.
The wider workup reads what the screen skips — free testosterone and SHBG alongside the total, a full thyroid, morning cortisol, and fasting insulin with a HOMA-IR — and it reads them against your symptoms and your own baseline, not just the range. That’s interpretation, not extra boxes checked: knowing whether an “in-range” testosterone is low for you, whether a borderline thyroid is dragging the rest, and which number is actually driving how you feel.
Same doctor, every visit. From Tustin to your follow-up.
The drive from Tustinbuys continuity: one doctor — Dr. Castellano, board-certified in Family Medicine, three decades in — who reads the wider panel himself and tracks it every visit. And TRT isn’t the only conversation worth having; for the Tustinpatient whose hormone panel reads borderline while the symptoms don’t, hormone support runs the wider workup that often finds the thyroid or cortisol pattern underneath.
Coming soon.
Dr. Castellano sees Tustin men every week. Their before-and-after stories will land here as patients give consent to share. In the meantime, ask about results in person — bring your most recent labs and we’ll show you how the trend lines look in practice for Tustin patients.
The questions Tustin patients ask most before the first visit.
- How far is the clinic from Tustin?
- Nine miles — up the 5 to the 22, exit S Euclid. Most Tustin patients are in and out of the office inside 90 minutes including the lab draw. Free on-site parking at the suite.
- What does the first visit look like?
- A one-hour sit-down with Dr. Castellano — history, symptom picture, options. A full hormone panel and metabolic bloodwork get ordered from the visit if they're not already on file. No protocol gets written before the labs come back and you've talked them through together.
- What's the typical protocol cost?
- TRT is a flat $250 a month — that includes the medication, the lab work, and the monthly follow-up. No package add-ons, no contract. If TRT isn't the right call after the labs come back, no one is locked in.
Nine miles up the 5. Free parking on-site.
Tustin patients start with the same core program every man here does: testosterone replacement therapy with Dr. Castellano — $250 a month, labs and monthly follow-ups included. (The initial consultation and bloodwork before starting are a separate service and cost.)
One conversation tells you whether this is the right fit.
Call the office to set up a 1-hour consult with Dr. Castellano. Bring whatever bloodwork you have on file — or fresh labs get ordered up front. Either way, you’ll leave with a real read on what’s going on.
Calling after hours? Leave a message — we’ll get back to you the next business day.