Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Alan De Ruyter, LMSW

Social Worker in Spencer, IA · enumerated 2013.

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

National Provider Identifier

1427482199

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Registry record

Entity type Individual (Type 1)

Name Mark Alan De Ruyter

Credential LMSW

Sex Male

Practice address 116 E. 11th St., Spencer, IA, 51301

Phone (712) 264-6048

Enumeration date Aug 29, 2013

Last updated in NPPES Aug 24, 2026

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 02160 (IA) Primary

Other identifiers

Identifier	Type	State	Issuer
02160	Other	IA	Social Work 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1427482199 active?

Yes, as of the latest NPPES snapshot, NPI 1427482199 is active (record last updated 2026-08-24).

How do I verify Mark De Ruyter's NPI record?

Cross-check NPI 1427482199 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-08-24.