Who is responsible for your data
Dr. David Alejandro Rojas Hernández, Internal Medicine specialist, with offices in Culiacán, La Cruz de Elota and Mazatlán, Sinaloa, Mexico, is responsible for the personal data you provide through this site.
What data is collected
This site does not automatically collect information beyond browsing data. What you share is what you choose to send:
- When requesting an appointment: your name, the reason for your visit as you write it, the location and your preferred time. This is sent via WhatsApp from your own phone; the site does not store it.
- Browsing data: pages visited, device type and traffic source, in aggregate and without identifying you personally.
How it is used
- To schedule, confirm and follow up on your appointment.
- To answer questions you send by WhatsApp or phone.
- To understand which content is useful and improve the site.
- To measure the results of social media advertising.
Your data is never sold or shared with third parties for commercial purposes.
Cookies and measurement technologies
This site is hosted on Vercel and uses its audience measurement tools (page views and visitor origin, without identifying you) and, when campaigns are running, the Meta pixel (Facebook and Instagram) to know whether an ad worked. These tools record browsing behavior in aggregate.
You can disable them from your browser privacy settings or, for Meta, from the ad preferences in your Facebook account.
The website assistant
The site includes an automated assistant that answers logistical questions: fees, hours, locations, what tests to bring and how to book. It is not a physician and does not replace a consultation, and it is barred from making diagnoses, interpreting symptoms or results, and recommending treatment or medication.
When you type into the assistant, your message is sent to Anthropic, the language-model provider that generates the reply, solely for that purpose. No identifying information is requested, and conversations are not linked to your name or added to any medical record. Please do not enter personal data, symptoms or test results there — that is what a consultation is for. If you prefer, you can write directly on WhatsApp without using the assistant.
Your medical record is separate
Medical information generated during a consultation —clinical history, studies, diagnosis and treatment— is part of your medical record and is handled under Mexican standard NOM-004-SSA3-2012 and medical professional secrecy. That record is confidential and is not managed through this website.
Your rights
You may request access to, correction or deletion of your data, or object to its use, at any time, and withdraw your consent. To do so, send a WhatsApp message or call the contact number; you will be told what information is held and what applies in your case.
Changes to this notice
If this notice changes, the updated version will be published on this same page. We suggest reviewing it if you send information through the site again.
Last updated: August 2026.