Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Callenda A Hacker, M.D.

Physical Medicine & Rehabilitation Physician in Milwaukee, WI · enumerated 2008.

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

National Provider Identifier

1235393844

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Callenda A Hacker

Credential M.D.

Sex Female

Practice address 2323 N Lake Dr Rm W1736, Milwaukee, WI, 53211

Phone (414) 298-6735

Fax (414) 298-6751

Enumeration date Jul 12, 2008

Last updated in NPPES Mar 17, 2018

Taxonomy & licenses

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License N9562 (TX) Secondary

2081P0010X Pediatric Rehabilitation Medicine Physician Allopathic & Osteopathic Physicians · License 53152 (WI) Secondary

2081P0010X Pediatric Rehabilitation Medicine Physician Allopathic & Osteopathic Physicians · License N9562 (TX) Secondary

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License 53152 (WI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

How do I verify Callenda Hacker's NPI record?

Cross-check NPI 1235393844 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1235393844 active?

Yes, as of the latest NPPES snapshot, NPI 1235393844 is active (record last updated 2018-03-17).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-17.