Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Panayiotis Sioutos, M.D.
Specialist in Falls Church, VA · enumerated 2012.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1114262359
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Registry record
Entity type Individual (Type 1)
Name Dr. Panayiotis Sioutos
Credential M.D.
Sex Male
Practice address 3300 Gallows Rd, Falls Church, VA, 22042
Phone (703) 776-6383
Fax (703) 776-4018
Enumeration date Nov 28, 2012
Last updated in NPPES Nov 28, 2012
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Panayiotis Sioutos?
Panayiotis Sioutos is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Wayne Batchelor Interventional Cardiology Physician · Falls Church, VA NPI 1639172885 Michael Ison Infectious Disease Physician · Falls Church, VA NPI 1316941222 Ingrid Savelloni Family Nurse Practitioner · Falls Church, VA NPI 1932105749 Carl Bontempo Cardiovascular Disease Physician · Falls Church, VA NPI 1487652038 Y Nabil Yakub Hospitalist Physician · Falls Church, VA NPI 1780682377 Bestpractices, Inc. Emergency Medicine Physician · Falls Church, VA NPI 1639177942 Firas Al-Kawas Gastroenterology Physician · Falls Church, VA NPI 1295733384 Nahrain Alzubaidi Endocrinology, Diabetes & Metabolism Physician · Falls Church, VA NPI 1447258538
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-11-28.