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Available in California & Alaska.

"I’ve seen a bunch of psychiatrists over the years, and so many of them would gaslight me or just completely dismiss what I was going through. I finally feel seen and supported. Working with Isaac has been such a breath of fresh air — he actually listens, cares, and treats me like a person, not just a checklist of symptoms.
We came up with my treatment plan together, and he was totally open to discussing meds I did research on or were curious about. On top of that, he integrates CBT into our visits, which has really helped me manage my panic attacks and get a better handle on everyday stuff like getting out of bed and making it to appointments.
I finally feel like I have someone on my side who gets it."

— Rachel N.

"Isaac is a one of a kind PCP whose empathy, acumen, and tenacity put him a cut above. His care for his patients is impossible to hide and to have someone like him in your corner while navigating American healthcare in 2025 is absolutely invaluable."

— LeeAnn B. 

"Menopause was ruining my life. I couldn’t sleep, I was sweating constantly (like, during Zoom calls — mortifying), I couldn’t think straight at work, and things were getting really hard with my wife. I felt like I was falling apart and no one was taking it seriously. I tried antidepressants — they did nothing. My insurance didn’t cover anyone who actually offered hormones, and all the clinics I found were charging $500 a month, which was just out of the question. I found Isaac online and booked an appointment out of pure desperation. He actually sat down and explained everything — the risks, the benefits, what’s real and what’s outdated fear-mongering. I had no idea that HRT was this safe, especially if you use the right medications. It’s been a few months and I feel like a different person. I can sleep. I can think. The hot flashes are manageable. Sex isn’t painful anymore. I just feel normal again."

— Kim A.

"I can’t recommend Isaac enough. He’s incredibly kind, patient, and thorough—he actually takes the time to explain everything in a way that makes sense and really makes you feel taken care of. I’ve been dealing with cubital tunnel syndrome for a few years, and it’s honestly been a nightmare. When I came in to see him, he immediately understood how painful and debilitating it can be. That kind of validation alone was a relief. We tried a few different treatments, got some imaging done, and he didn’t waste any time referring me to a specialist when needed. I also really appreciated that he found me a super affordable $20 brace on Amazon that ended up helping a lot. It’s rare to find a provider who cares this much and goes out of their way to help. Isaac is a fantastic NP and you'll be lucky to have him take care of you."

— Bill W.

"Mental health care is so frustrating to find, especially as a queer person. I really wanted to find someone specialized in LGBTQ care who could relate to me and how I experience the world around me. I’ve done the standard route through insurance and it hasn’t always felt like the right fit, appointments always seem to be scarce and the cost of even the copays just really adds up. I ended up finding Isaac and honestly… it’s been such a relief. He actually listens, doesn’t talk down to me, and explains things in a way that makes sense. He’s super patient, and I’ve never felt rushed. We talk through different options and what to watch for, and I feel way more in control of my care. I glad I decided to go with the $100/month option, and it’s been more than worth it. Way more affordable than what I was doing before, and I actually feel like I’m getting good care that fits me. Highly recommend."

— Deric C.

"I cannot speak highly enough of my experience with Isaac. From the very beginning, he made me feel genuinely seen, heard, and cared for. His calm presence, deep empathy, and clinical expertise have made a world of difference in my life. Isaac takes the time to understand the full picture. He listens without judgment, asks thoughtful questions, and never rushes our sessions. I always leave feeling more grounded, more understood, and more hopeful. When discussing medications or treatment options, he explains everything clearly and patiently, always making sure I feel informed and empowered. He truly goes above and beyond to find the best treatment plan and has been incredibly thorough and thoughtful in managing my care. I’ve worked with several providers in the past, but none have matched his level of compassion, insight, and genuine dedication. I’m incredibly grateful to have him in my corner and wholeheartedly recommend him to anyone seeking outstanding, personalized health care."

— Healthgrades

"Great experience with Dr. Berlin! He is extremely thorough, takes the time to listen and answer any questions, and extremely communicative. I’m grateful to have found him and would recommend him to any of my own contacts."

— Ari S.

"I've been seeing Isaac as my pcp for a few years and couldn't be happier with my care. He's very knowledgeable about any issue I bring to him, and he never makes me feel rushed or like I'm wasting his time (an experience I've had at other practices). He's great at explaining things in a way that makes it easy for me to understand."

— Alyssa K.

"I had the privilege of receiving care from Isaac, and I cannot speak highly enough of the exceptional care he provided for my issues with low testosterone. Isaac’s approach was the perfect blend of evidence-based medicine and patient-centered care.
He demonstrated a deep understanding of the latest research surrounding testosterone therapy and customized my treatment plan to fit my specific needs, ensuring that every decision was grounded in solid, up-to-date evidence."

— Harrison K.

"I find Isaac to lead his care with attentive, informed and reliable service. His tailored care to my personal concerns with depression aid me utilizing guided tools, constructive discussion and, most importantly, follow up. I feel heard and understood. I appreciate his holistic view of my needs and feel involved in decisions made about my health."

— Andy S.

"Isaac is one of the most detail-oriented healthcare providers I’ve ever had. He really thinks through every aspect of my health when putting together a care plan. His fastidiousness and attention to detail give me confidence that I’m in good hands. He is a PCP who truly cares about his patients and takes their health seriously. I’m lucky to have him as my PCP"

— Ethan W.