Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Rafael Walker -Santiago, M.D.

Adult Reconstructive Orthopaedic Surgery Physician in Grafton, WI · enumerated 2011 · practices at Aurora Medical Center Grafton.

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

National Provider Identifier

1366736928

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Registry record

Entity type Individual (Type 1)

Name Dr. Rafael Walker -Santiago

Credential M.D.

Sex Male

Practice address 975 Port Washington Rd, Grafton, WI, 53024

Phone (262) 329-1000

Enumeration date Jun 1, 2011

Last updated in NPPES Sep 12, 2023

Taxonomy & licenses

207XS0114X Adult Reconstructive Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 69295 (WI) Primary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 69295 (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
100103662	Medicaid	WI	-
036146317	Other	IL	IL PHYSICIAN LICENSE

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

How do I verify Rafael Walker -Santiago's NPI record?

Cross-check NPI 1366736928 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1366736928 active?

Yes, as of the latest NPPES snapshot, NPI 1366736928 is active (record last updated 2023-09-12).

Other providers at this practice address

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Robert Fish Anesthesiology Physician · Grafton, WI NPI 1942292610 Laurie Williams Nurse Practitioner · Grafton, WI NPI 1982695136 Thomas Zukowski Hematology & Oncology Physician · Grafton, WI NPI 1912989260 Igor Levin Anesthesiology Physician · Grafton, WI NPI 1376527895 Ali Sadeghi Anesthesiology Physician · Grafton, WI NPI 1114901345 Chad Vanden Heuvel Anesthesiology Physician · Grafton, WI NPI 1467436444 Michael Erickson Surgery Physician · Grafton, WI NPI 1497732408 Harjot Sidhu Gastroenterology Physician · Grafton, WI NPI 1902885924

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-12.