Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephen L Merrill, MD

Emergency Medicine Physician in Janesville, WI · enumerated 2006.

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

National Provider Identifier

1144246489

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Registry record

Entity type Individual (Type 1)

Name Stephen L Merrill

Credential MD

Sex Male

Practice address 3524 E Milwaukee St, Janesville, WI, 53546

Phone (608) 756-7100

Fax (608) 756-4700

Enumeration date Jul 13, 2006

Last updated in NPPES Nov 14, 2011

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 036049241 (IL) Primary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 036049241 (IL) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 51728 (WI) Secondary

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
215652	Other	-	MEDICARE GROUP #
MERRISTE	Other	WI	MERCYCARE INSURANCE
036049241	Medicaid	IL	-
553180	Other	-	MEDICARE #
553180	Other	IL	MEDICARE GROUP
P00612688CD3624	Other	WI	RR MEDICARE
834340	Other	-	MEDICARE GROUP #

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 Stephen Merrill practice?

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

What is the NPI number for Stephen Merrill?

The National Provider Identifier (NPI) for Stephen Merrill is 1144246489, 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 2011-11-14.