Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Regina Onic Hillsman, MD

Orthopaedic Surgery Physician in Southbury, CT · enumerated 2005.

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

National Provider Identifier

1649256165

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Registry record

Entity type Individual (Type 1)

Name Dr. Regina Onic Hillsman

Credential MD

Sex Female

Practice address 2 Pomperaug Office Park Ste 308, Southbury, CT, 06488

Phone (203) 586-1181

Enumeration date Dec 16, 2005

Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

207XS0114X Adult Reconstructive Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 21015 (CT) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 21015 (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
2108419	Other	-	AETNA PPO
17903	Other	-	CT CONTROLLED SUBSTANCE
21015	Other	-	CT STATE MEDICAL LICENSE
ZS054	Other	-	OXFORD
61399688004	Other	-	ALLIED HEALTH GROUP
045697001/030	Other	-	CIGNA
104857	Other	-	GAB
104857300	Other	-	ACS
010021015CT10	Other	-	ANTHEM BCBS
061399688 004	Other	-	CNC
121822	Other	-	HMC PPO
799988	Other	-	CONNECTICARE
83988	Other	-	UNH
OR0504	Other	-	HEALTHNET

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

Where does Regina Hillsman practice?

The practice location on file with NPPES is in Southbury, CT. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Regina Hillsman?

The National Provider Identifier (NPI) for Regina Hillsman is 1649256165, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Dr R Hillsman MD PC Orthopaedic Surgery Physician · Southbury, CT NPI 1295700441 Compass Medical Essentials LLC Durable Medical Equipment & Medical Supplies · Southbury, CT NPI 1851236509

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.