Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephen J O'Neil, MD

Surgery Physician in Greenwood, IN · enumerated 2006 · practices at Indiana Skin Cancer Ambulatory Surgical Center LLC.

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

National Provider Identifier

1629009956

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Registry record

Entity type Individual (Type 1)

Name Stephen J O'Neil

Credential MD

Sex Male

Practice address 701 East County Line Road, Suite 201, Greenwood, IN, 46143

Phone (317) 865-8000

Fax (317) 865-8012

Enumeration date Jul 5, 2006

Last updated in NPPES Apr 14, 2017

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 01054157A (IN) 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
000000197875	Other	IN	ANTHEM BLUE CROSS
7098286	Other	IN	AETNA ELIGIBILITY ID
020050030	Other	IN	MEDICARE RAILROAD
11046216	Other	IN	CAQH ID
P01157063	Other	IN	RR MEDICARE PTAN
000000010506	Other	IN	MDWISE/PROHEALTH
200345690A	Medicaid	IN	-

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 Stephen O'Neil?

Stephen O'Neil is registered in NPPES with the primary taxonomy of Surgery 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

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Julie Heimann Surgical Physician Assistant · Greenwood, IN NPI 1689765927 Indiana Skin Cancer Ambulatory Surgical Center LLC Ambulatory Surgical Clinic/Center · Greenwood, IN NPI 1093921298

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-04-14.