Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

James C Rosser Jr., MD

Q: What is the NPI number for James Rosser?

The National Provider Identifier (NPI) for James Rosser is 1851373807, a Type 1 (individual) record in the CMS NPPES registry.

Surgery Physician in Lancaster, WI · enumerated 2005.

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

National Provider Identifier

1851373807

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Registry record

Entity type Individual (Type 1)

Name James C Rosser Jr.

Credential MD

Sex Male

Practice address 507 S Monroe St, Lancaster, WI, 53813

Phone (608) 723-2131

Enumeration date Nov 16, 2005

Last updated in NPPES Mar 7, 2017

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 060498 (GA) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License ME112808 (FL) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 66285 (WI) 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
100060906	Medicaid	WI	-
02269950	Medicaid	NY	-

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

Where does James Rosser practice?

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

What is the NPI number for James Rosser?

The National Provider Identifier (NPI) for James Rosser is 1851373807, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-03-07.