Dr. Cesar Amescua, MD
UNAM · pain medicine and anesthesia background; nearly two decades in MSC and regenerative work. The spine specialist who designs every protocol, runs the consult, and leads the procedures.
Dr. Rocio Ambrosio Nuño, MD
UABC · anesthesiology, UAS. Runs twilight sedation and in-suite monitoring for joint injections and infusions.
Dr. Alejandro Castillo, MD
Interventional radiologist. Reviews your imaging with you, then guides the ultrasound in the suite. Also keeps the team current on the evidence.
Prefer to watch?
A real doctor, not a rented title.
This page is an 8-minute read. The video asks what's worth asking about any treatment abroad: is a real, named physician running your care, or a coordinator on a script? Keep scrolling for the full version.
Names, not job titles.
Most regenerative clinics list more "physicians" than they actually employ. Titles get rented; standing orders get signed by doctors who have never met the patient; the person you actually see is a sales coordinator or a nurse on a script. We chose a different shape.
At Celva, our physicians cover the core roles: clinical leadership, procedural delivery, and evidence review. The team is deliberately small, and the same names appear on every chart.
This page describes who they are, what each one is responsible for, and at which point in your care you'll meet them.
Named physicians
Not a marketing roster, the working clinical team.
Three distinct
Medical direction, procedure, evidence review. No overlap.
Every case
Every physician reaches every protocol. None of it is templated.
Dr. Cesar Amescua. the protocol.
Nearly two decades of mesenchymal stem cell work, going back to before "MSC" was a marketing term. UNAM medical degree, a background in pain medicine and anesthesia, and Hospital Angeles affiliation. He is the spine specialist and the main treating physician: he runs the clinical program, decides what protocols we offer, what dose, what cell source, leads the interventional procedures, and, most importantly, which cases we don't take.
Your first call is with a Celva patient coordinator who gathers your case; Celva’s medical team (Dr. Castillo or Dr. Ambrosio, whom he trained) then reviews independently. If a clinical question requires physician input, or you would like to speak with them directly, the physician team is available to join the call.
His position on this field is direct: less marketing, more mechanism. He is skeptical of any clinic that claims to treat everything, and he is willing to tell a paying patient that they are not a good candidate. The vetting process exists because he insists on it.
Dr. Rocio Ambrosio Nuño. the sedation.
Anesthesiology residency at Universidad Autónoma de Sinaloa, then trained directly under Dr. Amescua in interventional and regenerative procedures. An anesthesiology background means she thinks about monitoring, dosing, and patient safety automatically, it is not a checklist she runs through; it is how she watches a room.
When you are in the procedure suite at Hospital Angeles for a direct injection into a shoulder, knee, or hip, she runs your twilight sedation and watches your vitals throughout. The same person who examined you beforehand and walked you through what would happen, now keeping you comfortable and safe while it happens. There is no handoff to a stranger.
Patients consistently report that meeting her first changes the experience. We hear this often enough that it is no longer a coincidence.
Dr. Alejandro Castillo. the imaging.
Dr. Castillo is an interventional radiologist. Most patients meet him as part of the protocol: he reviews your MRI and imaging with you before the procedure, walks through the treatment, and then runs the ultrasound or fluoroscopy that guides each targeted injection in the suite. He is also training under Dr. Amescua in interventional spine and direct injection procedures.
The same eye that reads imaging reads the literature. Cochrane reviews, ClinicalTrials.gov registry scans, monthly reads of Cytotherapy, Stem Cell Reports, and the Journal of Translational Medicine. The job is to tell the clinical team when a case is outrunning the evidence, and his work shows up in the language we use with patients: the ranges instead of promises, the contraindications that exclude certain conditions, the protocol revisions when new trials change the picture.
A clinic without this role tends to recommend treatment for everything. With this role, the answer "this isn't a good fit for what the cells actually do" is on the table from day one.
The three roles, side by side.
The shortest version of the team:
Dr. Cesar Amescua
Founding physician · spine & pain medicine · nearly two decades MSC work
- EducationUNAM medical degree; pain medicine and anesthesia; tissue engineering & regenerative medicine postgraduate work
- OwnsProtocol design, candidate selection, the consult, and leading the interventional procedures
- You meetIn the lobby on day one, and on the consult call whenever you ask for him.
Dr. Rocio Ambrosio Nuño
Anesthesiology · sedation & monitoring
- EducationUABC medical degree; anesthesiology residency, UAS; procedural training under Dr. Amescua
- OwnsTwilight sedation, in-suite monitoring, and the patient-safety protocol
- You meetIn pre-op, and always at the bedside during the procedure.
Dr. Alejandro Castillo
Interventional radiology · imaging guidance
- EducationMD; interventional radiology
- OwnsImaging review with patients, in-suite ultrasound and fluoroscopy guidance, and evidence audits
- You meetWhen he reviews your imaging with you, and again in the suite during the procedure.
Where our physicians meet your care.
A common question on the consult call: "Will I actually see the doctor whose name I read on the website?" Here is the answer in matrix form: every patient-facing stage of care, who's there, and what they're doing.
The trade-off, stated plainly.
A small physician team is operationally harder to scale than a coordinator-led one. We see fewer patients per week than a high-volume clinic. That's not an apology; it's the trade. The patients we take get the actual physicians, and the ones we decline get told why instead of being routed to a different upsell.
The same names, on every chart.
Amescua designs the protocol, runs the consult, and leads the procedures. Ambrosio Nuño runs sedation and watches the room. Castillo reviews your imaging, guides it in the suite, and pushes back when the case outruns the data.
When you book, you are booking with one of your physicians. When you arrive, the same person greets you. When you leave, you have their direct route. That is the choice this team is built around.