Park Avenue Endocrinology | Endocrinologist & Nutritionist NYC
Endocrinology • Manhattan, NY
About
Park Avenue Endocrinology & Nutrition PLLC is a small NYC-based practice specializing in endocrinology and nutrition. Key points: - Services: Personalized care in endocrinology and nutrition (diagnostic tests and treatments). - Location: Two offices in Manhattan, 103 E 75th St, New York, NY 10021 (HQ). - Contact: 212-772-7628 - Leadership: Clifton Jackness, President - Size: Privately held, 1 employee listed; notable for targeted, concierge-style care. - Online presence: Parkavendo.com; modest web traffic with strong local focus (U.S. patients, 2 pages/visit, low bounce). If you’re seeking an endocrinologist and nutritionist in Manhattan, this practice emphasizes personalized endocrine care with nutrition support in a small, NYC-based setting.
Clinic Type
Endocrinology
Address
103 E 75TH ST, NEW YORK, New York 10021, US
Phone
212-772-7628
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Opening Hours
Not published — contact the clinic to confirm hours.
Website
Services Offered
Technology & Equipment
Team
Insurance & Payment
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Credit/Debit, Cash, Check, Health savings account (HSA), Flexible spending account (FSA)
Languages Spoken
Pricing
Current Offers
New Patient Offer
FAQs
What services do you offer?
Endocrinology care with in-house dietitian/diabetes educator; testing and management of endocrine disorders.
Awards & Accreditations
Social Media
Photos
What Patients Say
Overall sentiment across review platforms: mixed
- 4doctors.net: 3.4/5 (58)
Patients praise
- Physicians praised for being knowledgeable, caring, and thorough
- Appreciation for holistic and comprehensive care approaches
- Positive bedside manner from specific providers like Dr. Jackness and Dr. Eytan
- Patients felt comfortable asking questions and expressing concerns
Common complaints
- Complaints regarding rude or incompetent office staff
- Lack of responsiveness through the patient portal
- Reports of rude behavior from some physicians during phone interactions
- Occasional concerns regarding excessive testing or procedures
"I’m not sure who else is at this practice, but I only go there to see Dr. Clifton Jackness, the best Endocrinologist EVER! ... He really listens and sees you holistically."
— 4doctors.net Patient Review"Doctors never answer on patient portal. The office staff are incompetent and rude."
— Yelp Review"Tried to get an appointment here for hyperthyroidism but the front desk folks are so horrible to deal with. I had to leave, they disregard patients."
— A-Better-Place.com ReviewSynthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].
In the News
Information sourced from the clinic's website as of July 11, 2026.
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