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About

Summary: - The page describes Overlook Medical Center, a nonprofit teaching hospital in Summit, New Jersey, part of Atlantic Health. - Key facts: 504–573 beds (listed as 504; 573 employees), founded 1906, affiliated with Rutgers University, JCAHO standards. - Services and scope: general hospital offering primary, urgent, emergency care, imaging, lab services, and specialty care; part of Atlantic Health’s network across Northern New Jersey. - Location: 99 Beauvoir Avenue, Summit, NJ (near New York City); serves Summit and surrounding communities. - About the organization: Atlantic Health emphasizes personalized care; Overlook is one of three large employers in Summit and has connections to a broader health system in New Jersey. Note: The provided extracts do not include any information about a specific individual “Karen Ziemke, MD” or an Allergy practice in West Orange, NJ within Atlantic Health West Orange. If you’re seeking details on an allergist at Atlantic Health in West Orange, please provide a more targeted source or ask for contact/appointment information, and I can look up the relevant physician.

Clinic Type

Allergy and Immunology

Address

745 Northfield Avenue Suite 4 West Orange, NJ 07052

Phone

973-736-0041

Email

research@atlantichealth.org%20

Opening Hours

Not published — contact the clinic to confirm hours.

Emergency Care

Emergency care available at related Atlantic Health locations; links include emergency care resources

Services Offered

  • Allergy
  • Immunology
  • Pediatric Allergy
  • Asthma/Immunological Disorders
  • Respiratory Disorders and Pulmonary Fibrosis

Technology & Equipment

  • Allergy and Immunology
  • Pediatric Allergy
  • Asthma and Allergy management

Team

  • Karen Ziemke, MD, Board-certified in allergy and immunology; Fellow of AAAAI and ACDS — Allergist-Immunologist

Insurance & Payment

Languages Spoken

  • English

FAQs

Where to see me

Asthma, Allergy & Immunology; 745 Northfield Avenue Suite 4 West Orange, NJ 07052

Photos

What Patients Say

Overall sentiment across review platforms: positive

  • Healthgrades: 4.8/5 stars (17 reviews)
  • RateMDs: 4.9/5 stars
  • Vitals: 4.5/5 stars (6 ratings)
  • Everyday Health: 4/5 stars (1 review)

Patients praise

  • thorough exams
  • great bedside manner
  • professional and well-educated staff
  • clear diagnosis and explanation of conditions
  • satisfied with wait times

Common complaints

  • some platforms show limited written feedback, making it harder to gauge consistent negative experiences

"One of the best doctors I have ever been to. Very ..."

RateMDs

"Performs Thorough Exams Great Bedside Manner."

US News & World Report

"I have been a patient for 1 1/2 yrs. I find the entire staff professional and well educated."

Vitals

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

Information sourced from the clinic's website as of July 11, 2026.

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