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About

Union Anesthesia Associates and Raritan Anesthesia Associates Pain Management is a privately held medical practice based in Union, New Jersey, specializing in pain management through non-invasive, minimally invasive, and non-surgical techniques, with a focus on treating the pain source rather than just symptoms. The practice employs 7 people with multiple U.S. office locations (HQ at 695 Chestnut St., Union, NJ) and additional offices in North Brunswick, Bayonne, Bloomfield, and Hamilton Township. Services align with spine and neck/back pain, sciatica, and related musculoskeletal pain, integrating anesthesiology and pain management approaches.

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Clinic Type

Pain Management and Anesthesiology

Address

Bloomfield Ave, Scotch Plains? wait; offices in Union, Scotch Plains, South Bound Brook, New Brunswick, Old Bridge, Woodbridge and Bloomfield, NJ

Phone

908-851-7161

Email

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Opening Hours

Not published — contact the clinic to confirm hours.

Website

https://www.unionspinepain.com/

Services Offered

  • Pain Management
  • Anesthesiology
  • Interventional pain management
  • Epidural steroid injections
  • Facet joint injections
  • Radiofrequency ablation
  • Nerve blocks
  • Spinal cord stimulation
  • Minimally invasive spine surgery
  • Endoscopic surgery
  • Rhizotomy

Technology & Equipment

  • MRI review
  • epidural steroid injections
  • facet joint injections
  • radiofrequency ablation
  • nerve blocks
  • spinal cord stimulation
  • minimally invasive spine surgery
  • endoscopic surgery
  • rhizotomy

Insurance & Payment

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We accept most insurance providers. If you have specific questions regarding your coverage, please contact us for additional information.

Languages Spoken

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FAQs

What services does Union Anesthesia Associates provide?

Pain management and anesthesiology with treatments including epidural steroid injections, facet joint injections, radiofrequency ablation, nerve blocks, spinal cord stimulation, and minimally invasive surgery.

Photos

Union Anesthesia — Pain Management and Anesthesiology clinic in Union, NJ — photo 1Union Anesthesia — Pain Management and Anesthesiology clinic in Union, NJ — photo 2Union Anesthesia — Pain Management and Anesthesiology clinic in Union, NJ — photo 3Union Anesthesia — Pain Management and Anesthesiology clinic in Union, NJ — photo 4Union Anesthesia — Pain Management and Anesthesiology clinic in Union, NJ — photo 5Union Anesthesia — Pain Management and Anesthesiology clinic in Union, NJ — photo 6Union Anesthesia — Pain Management and Anesthesiology clinic in Union, NJ — photo 7Union Anesthesia — Pain Management and Anesthesiology clinic in Union, NJ — photo 8

What Patients Say

Overall sentiment across review platforms: positive

  • Union Anesthesia Associates website (internal testimonials): 4.85/5 (average) (not explicitly stated total count)
  • Yahoo Local: 5.0/5 (not explicitly stated total count)

Patients praise

  • professional and knowledgeable physicians
  • caring and attentive bedside manner
  • courteous and professional staff
  • patient-centered approach to pain management

Common complaints

  • employee reports of toxic work environment
  • employee complaints about lack of growth and training opportunities

"Dr. Fleischhacker is very professional and knowledgeable. He listens to the patients needs. The staff is very courteous and professional."

— Union Anesthesia Associates Testimonials

"Dr fleishhacker and dr Toran are beyond amazing with superb bedside manner. Erica, Ashley and Rosa sincerely go above and beyond to address any questions, concerns, etc to make sure you as the..."

— Yahoo Local Review

Synthesized 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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