models depicted (not actual patients) in compliance with Texas law

A More Personal Kind of Endocrine Care

A new approach to endocrinology...

It's called Direct Endocrine Care. We know you'll love it.

Here's the gist: we work with your primary care team by managing and coordinating your pediatric endocrinology care. Your primary care team consults our sub-specialized expertise, but you keep your primary care team. We don't accept any insurance, and as a result you save money. Become a member of our endocrinology practice, and get convenient office visits, personal communication via phone, e-mail, text, and a whole lot more for a reasonable monthly fee.

How Are We Different?

We're a Direct Endocrine Care practice. So, how do we differ from a conventional practice?


Fewer patients

Did you know that most pediatric endocrinologists manage between 800-1,200 patients? We limit our practice to under 300 patients total. That means that your doctor spends more time with you when you need him. Plus, when he is not actively seeing a patient, he is able to help coordinate your care and research your treatments.


No insurance

Endo4Life PLLC does not bill any insurance plans. Decisions about your healthcare will be made by you and your doctor without the impersonal management that comes from third-party payers. Instead, patients pay a monthly membership fee which can save money and covers excellent treatment. Give it a try, and you’ll quickly see for yourself the value of this approach!

Benefits of Membership

Personalized care

Schedule same-day or next day appointments when you need them.

24/7 communication

Contact us whenever you want, however you want — email, text, in-person, even video chat.

Save big on some labs and imaging

We've negotiated wholesale rates on many lab tests and imaging services, and we pass those savings straight to you.

See more benefits

Meet the Doctor

Robert Ferry, MD, MSS, FAAP

Pediatric Endocrinologist

Dr. Ferry is a pediatric endocrinologist and native Texan. When he's not diligently reviewing your data, he's probably serving the community. He never Photoshops his photographs, so he really does wear thick glasses. He takes his job seriously, but not himself.

Dr. Ferry grew up in South Texas. After graduating from Yale University, he returned to San Antonio for medical school and residency training in pediatrics at UT Health San Antonio, then completed his fellowship training in pediatric endocrinology at The Children's Hospital of Philadelphia in 2000. He served over 16 years on the full-time faculty of major U.S. medical schools, attaining the rank of tenured full professor and division chief, while serving as medical director for pediatric endocrine services of major children's hospitals. He has co-authored 140 peer-reviewed articles and book chapters (partial bibliography at He edited Management of Pediatric Obesity and Diabetes, which has yielded 24,927 chapter downloads since 2011. He is a member of the Endocrine Society and a fellow of the American Academy of Pediatrics among other professional organizations. He holds board certifications in pediatrics, pediatric endocrinology, and disaster medicine.

He has faithfully served in the Texas Army National Guard for many years, deploying to Iraq as an Army physician during 2005-2006 and 2009. After obtaining his master's degree in strategic studies as a distinguished graduate from the United States Army War College in 2018, Dr. Ferry returned home to Texas.

Membership fees

Our fees are simple and transparent, as they should be. No hidden fees or complex invoicing. You'll know exactly what you're paying and exactly what you're getting.


Endocrine condition (non-diabetes)


Diabetes mellitus, diabetes insipidus, or weight management


Enrollment fee
See full pricing


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Sign up

Are you ready to become a member? Great! We’re excited to have you on board. Just press the "Get Started" link or fill out the form to get the ball rolling, and we’ll be in touch.

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Learn more

Still want to learn more about direct endocrine care or our practice? Check out our FAQ page for answers to many common questions.

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Get in touch

Get in touch! We’re happy to chat and answer questions, at no obligation to you.

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