Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John T Hambrook, MD

Pediatric Cardiology Physician in Wauwatosa, WI · enumerated 2007.

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

National Provider Identifier

1477760577

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Registry record

Entity type Individual (Type 1)

Name John T Hambrook

Credential MD

Sex Male

Practice address 1055 N Mayfair Rd, Wauwatosa, WI, 53226

Phone (414) 479-2300

Enumeration date May 17, 2007

Last updated in NPPES May 27, 2025

Taxonomy & licenses

2080P0202X Pediatric Cardiology Physician Allopathic & Osteopathic Physicians · License 53035 (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
100003472	Medicaid	WI	-
1477760577	Medicaid	WI	-

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

Is NPI 1477760577 active?

Yes, as of the latest NPPES snapshot, NPI 1477760577 is active (record last updated 2025-05-27).

How do I verify John Hambrook's NPI record?

Cross-check NPI 1477760577 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

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William Matthaeus Hematology & Oncology Physician · Milwaukee, WI NPI 1326039074 Oncology Alliance, S.C. Oncology Clinic/Center · Wauwatosa, WI NPI 1598743577 Kurt Oesterling Hematology & Oncology Physician · Wauwatosa, WI NPI 1619944840 Susan Nasif Adult Health Nurse Practitioner · Wauwatosa, WI NPI 1801842125 Oncology Alliance Non-Pharmacy Dispensing Site · Wauwatosa, WI NPI 1013963404 Shannon Fogarty Nurse Practitioner · Wauwatosa, WI NPI 1508801622 Felicia Robertson Family Medicine Physician · Wauwatosa, WI NPI 1831206184 Rudolf Teschan Family Medicine Physician · Wauwatosa, WI NPI 1508973611

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-27.