At Ninth Street Internal Medicine, we’re always striving to offer the best care to our patients. With that, NSIM is thrilled to announce that two exceptional healthcare providers will be joining our team in the coming months. Please join us in welcoming Dr. Abraham Dubb and Sarah Alles, MSN, RN, AGPCNP-BC, both of whom bring a wealth of experience, compassion, and expertise to our practice.
Meet Our Two New Providers
Abraham Dubb, MD – Medical Doctor
We’re proud to have Dr. Abraham Dubb as part of our care team at NSIM.
Dr. Dubb joined the practice in February 2025, bringing with him over 30 years of medical experience and a deep commitment to patient-centered care. He offers expertise in a range of areas, including diabetes management, congestive heart failure, depression, pain management, and palliative care.
He is known for always putting patients first, developing individualized treatment plans that reflect each person’s unique needs, goals, and values. His compassionate, hands-on approach ensures patients feel heard, supported, and empowered throughout their care.
A lifelong Philadelphia resident, Dr. Dubb is honored to continue serving his community through his work at NSIM.
Want to learn more about Dr. Dubb? Read his full bio here.
Sarah Alles, MSN, RN, AGPCNP-BC – Nurse Practitioner
We’re proud to have Sarah Alles, NP on our care team at NSIM.
Sarah joined the practice in January 2025, bringing 8 years of experience in internal medicine and primary care. Before coming to NSIM, she worked in New York, where she developed a strong foundation in providing comprehensive, patient-centered care.
A Philadelphia native, Sarah is thrilled to be back in her hometown and to care for patients in the Center City community. She is committed to helping each patient achieve their best possible health and values building strong, long-term relationships with those she serves.
With her clinical expertise and compassionate approach, Sarah is a trusted and valued member of our team.
Want to learn more about Sarah? Read her full bio here.
What This Means for You
We’re grateful to have Dr. Dubb and Sarah Alles, NP as part of the NSIM team. Their combined experience and patient-first approach strengthen our commitment to delivering the high-quality, personalized care you’ve come to expect.
Both providers are now accepting new patients, and we’re confident they’ll make a meaningful impact on your health and wellness. To schedule an appointment with Dr. Dubb or Sarah Alles, please call our office at (215) 440-8681.
At NSIM, we’re always working to enhance your care — and we’re excited for you to get to know our newest team members.