Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Subhash Chaddha, MD

Pediatric Adolescent Medicine Physician in Fairfield, CT · enumerated 2006 · practices at John H. Machledt Jr. MD, LLC.

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

National Provider Identifier

1689742488

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Registry record

Entity type Individual (Type 1)

Name Subhash Chaddha

Credential MD

Sex Female

Practice address 52 Beach Road, Fairfield, CT, 06824

Phone (203) 255-4453

Fax (203) 254-2499

Enumeration date Dec 1, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2080A0000X Pediatric Adolescent Medicine Physician Allopathic & Osteopathic Physicians · License 16039 (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
0826903	Other	-	CIGNA HEALTHCARE PLANS
4273114	Other	-	AETNA HEALTH
ZP174	Other	-	OXFORD HEALTH PLANS
2162200	Other	-	AETNA HEALTH
000270	Other	-	HEALTH NET
49935	Other	-	UNITED HEALTH CARE

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.

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Frequently asked questions

What specialty is Subhash Chaddha?

Subhash Chaddha is registered in NPPES with the primary taxonomy of Pediatric Adolescent Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

Browse all →

Nirmala Monteiro Internal Medicine Physician · Fairfield, CT NPI 1558346338 John Machledt Endocrinology, Diabetes & Metabolism Physician · Fairfield, CT NPI 1154429413 John H. Machledt Jr. MD, LLC Internal Medicine Physician · Fairfield, CT NPI 1366678385

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.