Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Biles, M.D.

Internal Medicine Physician in New Fairfield, CT · enumerated 2006.

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

National Provider Identifier

1275557167

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Registry record

Entity type Individual (Type 1)

Name William Biles

Credential M.D.

Sex Male

Practice address 96 State Route 37, New Fairfield, CT, 06812

Phone (203) 746-6000

Enumeration date Jul 26, 2006

Last updated in NPPES Jul 25, 2016

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 035949 (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
035949	Other	CT	CONNECTICARE
2V3699	Other	CT	HEALTH NET
001359498	Medicaid	CT	-
428659	Other	CT	COMMUNITY HEALTH NETWORK
1751924	Other	CT	UNITED HEALTHCARE
P00172163	Other	CT	RAILROAD MEDICARE
867412	Other	CT	AETNA US HEALTHCARE
114AT20	Other	NY	EMPIRE BC BS
1410200	Other	NY	NY MEDICAID
P654192	Other	CT	OXFORD HEALTH PLANS

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

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 William Biles?

William Biles is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Robert Greco Medical Physician Assistant · New Fairfield, CT NPI 1073520557 Renee Derosa Family Medicine Physician · New Fairfield, CT NPI 1780024703

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-07-25.