Dr. Harleen Grewal, DDS
Dr. Anand Singh, MD
Dr. Anand Singh, MD
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Dr. Mack Sullivan, MD — A Multi-Disciplinary Physician Bridging Emergency Medicine and Everyday Wellness In Eastchester, New York, Dr. Mack Lee Sullivan, MD, has built a career that goes well beyond the traditional boundaries of a single specialty. As an Emergency Medicine physician who also holds training in Internal Medicine and Physical Medicine & Rehabilitation, Dr. Sullivan brings a uniquely comprehensive clinical perspective to his patients — one that blends the speed and precision of emergency care with the depth of a long-term primary care relationship. Education and Training Dr. Sullivan earned his medical degree from Albert Einstein College of Medicine of Yeshiva University in 1995. He completed two concurrent residencies, both at the Montefiore Medical Center / Albert Einstein College of Medicine complex: Residency in Emergency Medicine (Jacobi/Montefiore Campus), 1996–1999 Residency in Internal Medicine (Moses and Weiler Campuses), 1995–1998 This dual-residency training is exceptionally rare and gives Dr. Sullivan a depth of diagnostic reasoning that most physicians in either specialty alone cannot match. He is currently licensed to practice medicine in New York, New Jersey, and Connecticut. Practice Location Dr. Sullivan practices at Fitness And Recovery Medical, located at: 369 White Plains Rd, Suite B, Eastchester, NY 10709 He is affiliated with NewYork-Presbyterian Westchester, White Plains Hospital, and Long Island Jewish Medical Center. Academic Contributions Dr. Sullivan is not only a practicing clinician — he has contributed to the academic literature on cardiovascular medicine and emergency toxicology. His published research includes: Atrial fibrillation and anabolic steroids — The Journal of Emergency Medicine (1999) The cardiac toxicity of anabolic steroids — Progress in Cardiovascular Diseases (1998) Reciprocal strains in the normal and ischemic myocardium and their relation to the size of the ischemic region — Journal of the American College of Cardiology (1991) This research background underscores his deep command of cardiovascular and emergency medicine principles. Clinical Specialties Dr. Sullivan sees patients across a wide spectrum of medical needs: Primary and Preventive Care: Annual physicals and wellness evaluations Allergy consultations Illness management and acute care Emergency and Urgent Care: Rapid diagnosis and treatment of acute conditions X-ray interpretation and ordering Arthritis and musculoskeletal complaints Regenerative and Integrative Medicine: Regenerative medicine procedures (including knee injections and joint therapies) Hormone Replacement Therapy (HRT) and age management Physical therapy coordination Mental Health and Behavioral Medicine: Anxiety disorders (particularly in adults and children) Obesity and overweight management Dr. Sullivan is noted for treating anxiety disorders and childhood/adolescent weight concerns more frequently than most providers in similar practices — reflecting his broader interest in the intersection of physical and mental health. Telehealth Services Dr. Sullivan offers telehealth and virtual consultations, allowing patients to access his care remotely. He can be reached through his practice at (914) 395-3691. Accepted Insurance Dr. Sullivan accepts a range of insurance plans including Aetna, Cigna, Blue Cross Blue Shield, and United Healthcare, as well as Medicare.
Dr. Mack Sullivan, MD

Dr. Harleen Grewal, DDS

Dr. Harleen Grewal, DDS, is an award-winning pediatric and family dentist in Santa Clarita, CA. Founder of Skyline Smiles, she specializes in kids’ dentistry, cosmetic care & sedation.

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Dr. Harleen Grewal, DDS — Transforming Smiles, One Patient at a Time

Every great smile starts with the right dentist. In Santa Clarita, California, Dr. Harleen Grewal, DDS — affectionately known as “Dr. Leena” or “Dr. Harleen” by her patients — has become one of the most trusted and celebrated dental professionals in the region. As the founder and owner of Skyline Smiles, she combines cutting-edge dental technology, compassionate care, and a deeply personal touch that keeps patients of all ages coming back.

Education and Training

Dr. Harleen’s path to dentistry is rooted in excellence. She completed her Doctor of Dental Surgery (DDS) at the University of Southern California, where she earned recognition on the Dean’s List for her academic achievement. Following dental school, she completed a Residency in Pediatric Dentistry, earning her specialty certificate from Lutheran Medical Center in Holyoke, MA — giving her formal, advanced training in the unique dental needs of children.

She is a proud member of:

  • The American Dental Association (ADA)
  • The American Academy of Pediatric Dentistry (AAPD)

Awards and Recognition

Dr. Harleen’s commitment to her community and her profession has earned her multiple prestigious recognitions:

  • Best Kids Dentist in Santa Clarita — awarded by The Signal newspaper for 2022, 2023, and 2024
  • Ultimate Pediatric Dentist of 2024 — named by élite Magazine as part of their 10th Annual Ultimate Ladies in Business Awards
  • Best Pediatric Dentist of 2025 — recognized by élite Magazine across the Santa Clarita Valley

These awards reflect the deep trust and consistent excellence that Dr. Harleen delivers year after year.

Skyline Smiles — The Practice

Skyline Smiles is located at 28532 La Madrid Dr, Suite B, Santa Clarita, CA 91350. Dr. Harleen leads a highly skilled team of warm, friendly, and dedicated dental professionals who create a calm, welcoming environment for patients of all ages — from a child’s very first dental visit to complex adult restorative procedures.

The practice is open Monday through Friday, 8:00 AM to 5:00 PM.

Services Offered

Dr. Harleen provides a comprehensive range of dental services under one roof, including:

Pediatric Dentistry:

  • First dental visits for infants and toddlers
  • Preventive care: cleanings, sealants, fluoride treatments
  • Children’s fillings and restorations
  • Interceptive orthodontic guidance
  • Oral health education for parents and children
  • Sedation dentistry for anxious young patients

General and Family Dentistry:

  • Comprehensive exams and digital X-rays
  • Adult cleanings and periodontal care
  • Fillings, crowns, and bridges
  • Tooth extractions

Cosmetic Dentistry:

  • Teeth whitening
  • Veneers and smile makeovers
  • Cosmetic bonding

Specialty Services:

  • TMJ (Temporomandibular Joint) disorder diagnosis and treatment
  • Dental trauma and personal injury dentistry — including care for accident-related tooth damage
  • Oral reconstructive surgery
  • Mobile COVID testing (provided during the pandemic as a community health initiative)

Dr. Harleen is also the visionary behind Mind Body Infusion, a med spa that merges wellness and aesthetics, further extending her mission to help people look and feel their best.

Community Involvement

Beyond her clinical work, Dr. Harleen is deeply committed to her Santa Clarita community. She actively supports nonprofit organizations including Soroptimist International, the Wish Foundation, Santa Clarita Pregnancy Center, and Henry Mayo Newhall Hospital. During dental school, she volunteered at the USC Mobile Clinic and participated in the ADA Foundation’s Give Kids A Smile® program, providing free oral health services to children in need.

What Patients Say

Patients consistently describe Dr. Harleen as passionate, thorough, and genuinely caring — always asking how patients are doing throughout their procedure and ensuring they feel at ease. Families report feeling welcomed as if they were part of the Skyline Smiles family, and patients travel from outside Santa Clarita specifically to see her.

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