Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Carolyn P Butler, M.D.

Ophthalmology Physician in Waukesha, WI · enumerated 2006 · practices at Medical Eye Associates, S.C..

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

National Provider Identifier

1831156835

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Registry record

Entity type Individual (Type 1)

Name Carolyn P Butler

Credential M.D.

Sex Female

Practice address N19w23993 Ridgeview Pkwy W Ste 100, Waukesha, WI, 53188

Phone (262) 547-3352

Fax (262) 547-9142

Enumeration date Apr 26, 2006

Last updated in NPPES Dec 26, 2023

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 37351-020 (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
32256900	Other	WI	ABRI
391101335	Other	WI	WI PHYS SERVICES WPS
391101335	Other	WI	WI HEALTH INS RISK PROG
0800099	Other	WI	UNITED HEALTHCARE
32256900	Medicaid	WI	-
180026829	Other	WI	RAILROAD MEDICARE
822601	Other	WI	VIPA
4509471	Other	WI	AETNA
747042	Other	WI	MOHAWK
103432	Other	WI	HEALTH ALLIANCE
32256900	Other	WI	MANAGED HEALTH SERVICES

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

Is NPI 1831156835 active?

Yes, as of the latest NPPES snapshot, NPI 1831156835 is active (record last updated 2023-12-26).

How do I verify Carolyn Butler's NPI record?

Cross-check NPI 1831156835 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Deborah Bernstein Ophthalmology Physician · Waukesha, WI NPI 1326005919 Medical Eye Associates, S.C. Ophthalmology Physician · Waukesha, WI NPI 1023066636 Douglas Long Ophthalmology Physician · Waukesha, WI NPI 1255368528 Jessica Schrieber Ophthalmology Physician · Waukesha, WI NPI 1942512538 Katherine Dalzotto Ophthalmology Physician · Waukesha, WI NPI 1144781188

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-12-26.