Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Michael Joseph Krzyzaniak, M.D.

Trauma Surgery Physician in San Diego, CA · enumerated 2007.

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

National Provider Identifier

1164626594

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Joseph Krzyzaniak

Credential M.D.

Sex Male

Practice address San Diego, CA, 92103

Phone (619) 299-3100

Enumeration date Jun 11, 2007

Last updated in NPPES Apr 8, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

202C00000X Independent Medical Examiner Physician Allopathic & Osteopathic Physicians · License 50424 (WI) Secondary

2086S0102X Surgical Critical Care Physician Allopathic & Osteopathic Physicians · License A146490 (CA) Secondary

2086S0127X Trauma Surgery Physician Allopathic & Osteopathic Physicians · License A146490 (CA) 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

What is the NPI number for Michael Krzyzaniak?

The National Provider Identifier (NPI) for Michael Krzyzaniak is 1164626594, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michael Krzyzaniak practice?

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

Other providers at this practice address

Browse all →

Richard Blum Cardiovascular Disease Physician · San Diego, CA NPI 1043310030 Kimberly Peck Surgery Physician · San Diego, CA NPI 1215018403 Jeffrey Weiss Vascular Surgery Physician · San Diego, CA NPI 1699833012 Vishal Bansal Trauma Surgery Physician · San Diego, CA NPI 1194889410 Fakhri Salem Specialist · San Diego, CA NPI 1659416485 Amelia Simpson Trauma Surgery Physician · San Diego, CA NPI 1538484084 Bryan Dieffenbach Vascular Surgery Physician · San Diego, CA NPI 1326466137 Mercy Vascular, A Professional Medical Corporation Vascular Surgery Physician · San Diego, CA NPI 1306369798

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-04-08.