Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jantje Matthew Groot, MD

Q: What is the NPI number for Jantje Groot?

The National Provider Identifier (NPI) for Jantje Groot is 1083859912, a Type 1 (individual) record in the CMS NPPES registry.

Psychiatry Physician in Ventura, CA · enumerated 2008.

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

National Provider Identifier

1083859912

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Registry record

Entity type Individual (Type 1)

Name Dr. Jantje Matthew Groot

Credential MD

Sex Male

Practice address 4258 Telegraph Rd, Ventura, CA, 93003

Phone (805) 477-5700

Fax (805) 644-5245

Enumeration date Dec 5, 2008

Last updated in NPPES May 21, 2021

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License A102213 (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 Jantje Groot?

The National Provider Identifier (NPI) for Jantje Groot is 1083859912, a Type 1 (individual) record in the CMS NPPES registry.

Where does Jantje Groot practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-21.