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

Michael J. Lodwig, DC

Chiropractor in Castro Valley, CA · enumerated 2020.

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

National Provider Identifier

1538792718

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Registry record

Entity type Individual (Type 1)

Name Michael J. Lodwig

Credential DC

Sex Male

Practice address Castro Valley, CA, 94546

Phone (510) 880-9557

Fax (510) 582-0937

Enumeration date Feb 17, 2020

Last updated in NPPES Feb 17, 2020

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

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 21409 (CA) Primary

DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC 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 Michael Lodwig's NPI record?

Cross-check NPI 1538792718 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1538792718 active?

Yes — as of the latest NPPES snapshot, NPI 1538792718 is active (record last updated 2020-02-17).

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L. Wu Optometrist · Castro Valley, CA NPI 1770523763 Timothy Jameson Chiropractor · Castro Valley, CA NPI 1326178542

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-17.