Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

You Sung Sang, M.D.

Gastroenterology Physician in Norwich, CT · enumerated 2005 · practices at John J Giacchetto MD PC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1275520892

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Registry record

Entity type Individual (Type 1)

Name You Sung Sang

Credential M.D.

Sex Male

Practice address 105 Wawecus St, Suite 1, Norwich, CT, 06360

Phone (860) 859-9061

Fax (860) 889-6200

Enumeration date Sep 29, 2005

Last updated in NPPES Aug 15, 2014

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 034513 (CT) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
2543591	Other	CT	AETNA HMO
345130	Other	CT	CONNECTICARE
5860483	Other	CT	AETNA PPO
NLS084	Other	CT	OXFORD HEALTH PLAN
010034513CT01	Other	CT	ANTHEM BCBS OF CT

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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify You Sung Sang's NPI record?

Cross-check NPI 1275520892 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1275520892 active?

Yes, as of the latest NPPES snapshot, NPI 1275520892 is active (record last updated 2014-08-15).

Other providers at this practice address

Browse all →

John Giacchetto Orthopaedic Surgery Physician · Norwich, CT NPI 1427052380 Tonya Hall Gastroenterology Physician · Norwich, CT NPI 1104813724 John J Giacchetto MD PC Orthopaedic Surgery Physician · Norwich, CT NPI 1487976676 Ayesha Siddique Anatomic Pathology & Clinical Pathology Physician · Norwich, CT NPI 1730617861

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-08-15.