Physician-Owned & Physician-LedScottsdale & Greater PhoenixArizona

Scottsdale InpatientSpecialists

Hospital MedicinePost-Acute CareCare Coordination

An established independent medical group with the clinical scale, physician leadership, and care infrastructure to support patients and healthcare partners across acute and post-acute settings.

Operational InfrastructureStrategic PartnershipsScalable Coverage
Our clinical services Performance & outcomes Healthcare partnerships
35+Physicians & advanced practice providers
160,000+Patient encounters annually
24/7Hospitalist coverage
20+Post-acute facilities served

Who we are

What Defines SIS

Experienced clinicians
Regional reach
Coordinated care

Scottsdale Inpatient Specialists is an independent medical group specializing in hospital medicine and post-acute care throughout Scottsdale and the greater Phoenix metropolitan area.

Our clinicians bring extensive hospital and post-acute experience, supported by responsive leadership, operational infrastructure, and care coordination across changing levels of care.

See how our model works

Caring For Patients—And Those Who Care For Them.

At SIS, compassion extends to patients, families, and our care teams. We listen with empathy, communicate clearly, and support those navigating illness alongside their loved ones.

Our group has a strong track record of supporting clinicians’ work-life balance. Clinicians shape their own schedules in collaboration with management, balancing personal needs with dependable patient coverage. This flexibility reflects our belief that those who care for others deserve care, too.

Supporting the Next Generation of Clinicians

Some SIS clinicians welcome medical students and nurse practitioner students for supervised clinical learning, sharing their experience and helping prepare the next generation of healthcare professionals.

Learning opportunities depend on clinician availability and facility requirements.

What we do

Care Across The Continuum

Reliable physician coverage, coordinated medical management, and accountable clinical leadership.

Acute Care

Hospital Medicine

Comprehensive inpatient medical care—from admission and daily management through discharge planning.

  • Admissions and inpatient management
  • Interdisciplinary rounding
  • 24/7 physician coverage
Recovery Care

Post-Acute Care

Medical management throughout rehabilitation and skilled nursing recovery.

  • Acute rehabilitation care
  • Skilled nursing medicine
  • Clinical monitoring and follow-up
Connected Care

Care Coordination

Clear communication across facilities, care teams, patients, families, and community clinicians.

  • Transition communication
  • Medication reconciliation
  • Patient and family education

The SIS model

Care That Continues Beyond Discharge

Transitions are vulnerable moments. Our model emphasizes robust communication so the care plan remains clear as the patient moves between settings.

Community ProvidersClear handoff for safe ongoing care

At discharge, SIS communicates pertinent clinical information to community physicians and specialists. Ongoing outpatient and primary care remain with the patient’s established providers.

Performance focus

Performance That Matters

SIS consistently compares favorably with established benchmarks in patient experience, length of stay, and avoidable readmissions.

Patient Experience

Physicians who listen carefully and treat patients with respect.

Efficient Care

Reduced length of stay without compromising quality.

Successful Transitions

Coordinated discharge planning that helps reduce avoidable readmissions.

Clinical Excellence

Thoughtful medical management for complex patients.

Communication

Clear, respectful collaboration with everyone involved in care.

Accountability

Physician leadership, performance measurement, and improvement.

For healthcare organizations

A Physician Partner Built Around Coverage, Quality, And Continuity.

Healthcare organizations need more than scheduled shifts. They need dependable coverage, responsive leadership, operational alignment, and physicians who understand the full patient journey.

SIS combines an established regional clinician network with an integrated acute and post-acute model—an infrastructure designed to support responsible growth, new partnerships, and expansion across the Phoenix metropolitan area.

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Scalable hospitalist coverage and staffing models

Medical director and physician-leadership support

Quality, utilization, and throughput collaboration

Post-acute physician services and transition initiatives

Compliance, credentialing, and performance infrastructure

Our leadership

Clinicians Leading Clinicians

Local, accessible leadership grounded in the daily practice of medicine.

Raad Hindosh, MD

Raad Hindosh, MD

Managing Partner & Chief Medical Officer

Board-certified in Internal Medicine with focused practice in hospital medicine. Dr. Hindosh leads SIS clinical operations, quality, physician engagement, and strategic growth.

Honors & Awards
  • Phoenix Best Doctors, 2018–2026
  • Distinguished Medical Service Award, HonorHealth Shea Medical Center, 2026
  • Valued Partner in Philanthropy, Scottsdale Healthcare Foundation
Omid Dilmaghanian, MD

Omid Dilmaghanian, MD

Managing Member & Medical Director, Post-Acute Care

Dr. Dilmaghanian leads SIS post-acute clinical services and works with physicians and facility teams to support coordinated care after hospitalization.

Gregory Gargiulo, DO

Gregory Gargiulo, DO

Managing Member

Dr. Gargiulo helps guide SIS leadership, physician collaboration, and the group’s long-term development.

Clinical & Compliance Leadership

John Ta, MD

John Ta, MD

Co-Medical Director, Hospital Medicine

Judi Gargiulo, JD

Judi Gargiulo, JD

Chief Compliance Officer

Tara Pesch, LPN

Tara Pesch, LPN

Hospitalists Coordinator and Clinical Liaison

Our physicians & providers

Meet The Clinicians Behind SIS

Hospitalists and post-acute clinicians serving Scottsdale and the greater Phoenix metropolitan area.

Ahmed Agha, MD

Ahmed Agha, MD

Family Medicine

Abrazo Health, AZ

Bret Bitza, DO

Bret Bitza, DO

Internal Medicine

Valley Hospital Medical Center Las Vegas, NV

Dan Shtutman, DO

Dan Shtutman, DO

Family Medicine

North Country HealthCare Flagstaff, AZ

Shiven Chaudhry, MD

Shiven Chaudhry, MD

Internal Medicine & Integrative Medicine

Cedars-Sinai, CA

Gregory Gargiulo, DO

Gregory Gargiulo, DO

Internal Medicine

Creighton University School of Medicine, AZ

Hieu Luu, MD

Hieu Luu, MD

Internal Medicine

Ochsner Clinic Foundation, LA

Heather McColl, DO

Heather McColl, DO

Family Medicine

HonorHealth Family Medicine Osborn Residency, AZ

Harjinder Bal, MD

Harjinder Bal, MD

Internal Medicine

St. Elizabeth Youngstown Hospital, OH

John Carroll, MD

John Carroll, MD

Internal Medicine

Maricopa Medical Center Phoenix, AZ

Jonathan Dill, DO

Jonathan Dill, DO

Family Medicine

St. Anthony North, CO

Mohammad Abdul-Rasool, MD

Mohammad Abdul-Rasool, MD

Family Medicine

Mercy Health Toledo, OH

Mark Carter, MD

Mark Carter, MD

Internal Medicine

University of Arizona Tucson, AZ

Mark Okafor, MD

Mark Okafor, MD, PhD

Family Medicine

Residency details forthcoming

Maha Tomas, MD

Maha Tomas, MD

Internal Medicine

Maricopa Medical Center Phoenix, AZ

Mufid Khoury, MD

Mufid Khoury, MD

Family Medicine

Corewell Health East Beaumont (Wayne), MI

Maria Raquel Saldivar, MD

Maria Raquel Saldivar, MD

Internal Medicine

Southern Illinois University, IL

Nagaraj Madugonde, MD

Nagaraj Madugonde, MD

Internal Medicine

McLaren Regional Medical Center, MI

Omid Dilmaghanian, MD

Omid Dilmaghanian, MD

Family Medicine

University of Wyoming, WY

Payam Azima, MD

Payam Azima, MD

Internal Medicine

Maimonides Medical Center, NY

Poliana Tan, MD

Poliana Tan, MD

Internal Medicine

University of Arkansas for Medical Sciences College of Medicine, AR

Paul Kim, MD

Paul Kim, MD

Internal Medicine

Drexel University College of Medicine/Hahnemann University Hospital, PA

Ryan Evans, MD

Ryan Evans, MD

Internal Medicine

University of Texas Health Sciences Center at Houston, TX

Raad Hindosh, MD

Raad Hindosh, MD

Internal Medicine

Maricopa Medical Center Phoenix, AZ

Russell Esquivel, MD

Russell Esquivel, MD

Internal Medicine

Creighton University School of Medicine, AZ

Ronald Kane, MD

Ronald Kane, MD

Family Medicine

University of Manitoba, Canada

Saif Alrabadi, MD

Saif Alrabadi, MD

Family Medicine

Yuma Regional Medical Center, AZ

Shahram Emrani, MD

Shahram Emrani, MD

Family Medicine

St. Francis Hospital, DE

Shaila Karan, MD

Shaila Karan, MD

Internal Medicine

University of Buffalo, NY

Shiva Gosi, MD

Shiva Gosi, MD

Family Medicine & Masters in Public Health

East Tennessee State University, TN

Steven Parker, MD

Steven Parker, MD

Internal Medicine

University of Texas at Austin Dell Medical School, TX

Steve Seymour, FNP

Steve Seymour, FNP

Nurse Practitioner

Northern Arizona University, AZ

Sukhdeep Khurana, MD

Sukhdeep Khurana, MD

Internal Medicine

University of California San Diego, CA

John Ta, MD

John Ta, MD

Internal Medicine

University of Arizona Tucson, AZ

Tejkaran Dhillon, DO

Tejkaran Dhillon, DO

Internal Medicine

University of Texas Health Sciences Center at Houston, TX

Vinay Prabhakaran, MD

Vinay Prabhakaran, MD

Internal Medicine

Marshall University Huntington, WV

Careers at SIS

Your Experience.
Our Shared Purpose.

Join an independent medical group serving patients across hospital and post-acute settings throughout Scottsdale and the greater Phoenix metropolitan area. Introduce yourself through our recruitment form, including your clinical background and availability.

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Physician ledClinical decisions guided by practicing physicians.

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Multiple care settingsHospital medicine and post-acute opportunities.

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Collaborative environmentEstablished operational and compliance support.

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Work-life balanceShape your schedule in collaboration with management, with flexibility that supports both your life and patient care.

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Room to leadLeadership opportunities for qualified clinicians.

We Collaborate With

HonorHealthVisit Website (opens in a new tab) Innovation Care PartnersVisit Website (opens in a new tab) revMDVisit Website (opens in a new tab) Ingenious MedVisit Website (opens in a new tab)

Patients & families

Understanding Your Care And Your SIS Bill

Who is Scottsdale Inpatient Specialists?

SIS is a physician group whose clinicians provide medical care in hospitals and post-acute facilities. You may have been treated by an SIS physician even if you did not schedule an office appointment with our group.

Why did I receive a separate bill from SIS?

Hospitals, facilities, and physicians may bill separately. An SIS statement is for professional services provided by an SIS clinician and is separate from hospital, laboratory, radiology, or specialist charges.

Who do I contact with billing questions?

For questions about an SIS statement, insurance processing, or payment options, contact revMD at (480) 355-3680 or PFS@revMD.com.

Contact SIS

Let’s Start With The Right Conversation.

Choose the contact path that best matches your need.

General office(480) 805-8855Monday–Friday, 8 a.m.–4 p.m. Patient billing · revMD(480) 355-3680PFS@revMD.com Billing emailPFS@revMD.comQuestions about an SIS statement

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