Full-Time

Administrative Assistant

Outpatient Services

Mountainside Treatment Center

Mountainside Treatment Center

201-500 employees

Chemical dependency treatment and rehab center

Compensation Overview

$20 - $28/hr

+ $75 monthly wellness reimbursement + 401(k) employer match

Chappaqua, NY, USA

In Person

Bachelor's, Associate's

Category
Medical, Clinical & Veterinary (1)
Required Skills
Electronic Health Records (EHR)
Customer Service
HIPAA

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Requirements
  • A high school diploma or equivalent is required.
  • Previous customer service or administrative experience is required; healthcare experience is preferred but not required.
  • Proficiency with Microsoft Office Suite, Adobe Acrobat, electronic medical record systems, scheduling platforms, and internet applications is required.
  • Ability to work independently and collaboratively within a multidisciplinary team is required.
  • Strong organizational and time management skills, including the ability to prioritize multiple responsibilities in a fast-paced environment, are required.
  • Excellent oral and written communication skills with a professional, client-centered approach are required.
  • Strong attention to detail, problem-solving ability, follow-through, and initiative are required.
  • Knowledge of HIPAA regulations and commitment to maintaining client confidentiality are required.
  • Awareness and sensitivity to addiction and socioeconomic diversity, along with strong cultural competency, are required.
  • Reliable attendance and dependability are required.
Responsibilities
  • Greet clients entering and exiting the facility and follow check-in and check-out procedures to maintain accurate client census and facility safety.
  • Maintain a welcoming, organized, and professional front desk environment while providing customer service to clients and visitors.
  • Ensure visitors complete required documentation, including confidentiality agreements.
  • Answer incoming phone calls using established scripts and protocols while adhering to HIPAA and confidentiality guidelines.
  • Schedule, confirm, reschedule, and coordinate client appointments using the electronic medical record system and appropriate billing codes.
  • Prepare welcome materials, intake paperwork, release of information forms, confidentiality documents, and other materials for admissions and new clients.
  • Conduct urine toxicology collections according to CLIA-waived testing procedures; label, document, and submit specimens and maintain testing supplies.
  • Maintain the urine toxicology schedule and inventory of testing supplies and front desk materials, and notify leadership when reordering is needed.
  • Collect client co-payments, process payment pages, document financial transactions, assist with insurance and billing processes, and maintain accurate client accounts, invoices, and financial documentation.
  • Assist with insurance verification, authorization documentation, and billing-related administrative processes.
  • Review, create, and organize payment pages and invoices for services rendered.
  • Assist with bookkeeping duties as assigned.
  • Process appointment reminders, client outreach, cancellations, rescheduling, waitlists, and no-show documentation.
  • Collaborate with clinical and administrative staff to coordinate scheduling, maintain accurate appointment statuses, and support daily operations.
  • Receive and document deliveries, including MATS deliveries, according to established standard operating procedures.
  • Sort and distribute incoming mail, notify appropriate parties, and forward mail to Canaan as needed.
  • Prepare materials for clinical programming, recovery support initiatives, community events, and team meetings.
  • Take meeting minutes and provide administrative support for departmental meetings.
  • Complete end-of-shift reports and maintain accurate administrative records.
  • Assist with clerical duties, database entry, reporting, and additional administrative projects.
  • Provide backup scheduling and phone coverage for other administrative team members.
  • Support intake documentation workflows and operational reporting and administrative processes.
Desired Qualifications
  • An associate's or bachelor's degree is preferred.
  • A New York Notary Public credential is preferred.
  • One or more years of administrative or medical office experience is preferred.
  • Experience supporting insurance verification, client accounts, scheduling, and billing processes within a healthcare or outpatient setting is preferred.
Mountainside Treatment Center

Mountainside Treatment Center

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Mountainside Treatment Center provides chemical dependency treatment for drug and alcohol addiction at multiple locations across Connecticut, New York, and New Jersey, with virtual services available in Massachusetts. The center offers structured programs that combine medical supervision, therapy, counseling, and support services to help clients stop abusing substances and achieve recovery. A distinctive aspect is its emphasis on the role every staff member plays in delivering a positive, personalized experience for clients during their stay, reflecting a long-standing commitment since its founding in 1998. The goal is to help people attain lasting sobriety and improve overall well-being.

Company Size

201-500

Company Stage

N/A

Total Funding

N/A

Headquarters

Canaan, Connecticut

Founded

1998

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Simplify Jobs

Simplify's Take

What believers are saying

  • June 2026 Huntington PHP expands Long Island demand capture into higher-acuity outpatient care.
  • June 2026 scholarship awards to 11 students deepen referral networks across Connecticut and New York.
  • Kratom-focused thought leadership positions Mountainside as a regional expert as awareness rises.

What critics are saying

  • Connecticut kratom admissions nearly tripled by March 2026, pressuring clinical capacity and reputation.
  • NJ.com reported a $40 million Mountainside Medical Center negligence lawsuit in April 2026.
  • Stony Brook's publicly listed rotations still show year-limited access, limiting talent-pipeline scale.

What makes Mountainside Treatment Center unique

  • Mountainside runs addiction-focused PHP in Huntington and detox-to-outpatient continuum.
  • It trains Stony Brook and Southampton residents through a two-week Addiction Medicine rotation.
  • Its clinician-led scholarship and film-festival brand building strengthens community visibility beyond treatment.

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Benefits

Paid Vacation

Paid Holidays

401(k) Retirement Plan

401(k) Company Match

Wellness Program

Paid Sick Leave

Company News

Mountainside
Apr 27th, 2022
Mountainside recognized as Recovery-Friendly Workplace

Mountainside Treatment Center has been designated as a Recovery-Friendly Workplace by Connecticut Gov. Ned Lamont.

Mountainside
Feb 2nd, 2022
Mountainside partners with Southampton Hospital

Mountainside Treatment Center is partnering with Southampton Hospital and Stony Brook University to welcome resident Family Practice doctors to participate in a two-week Addiction Medicine training rotation at Mountainside in Canaan, CT.

The Berkshire Edge
Oct 18th, 2021
Mountainside partners with Release Recovery Foundation

During National Substance Abuse Prevention Month, Mountainside treatment center is partnering with Release Recovery Foundation to provide scholarships to women battling substance use disorders.