Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Mathilda Klupsteen, MD

Neonatal-Perinatal Medicine Physician in Bakersfield, CA · enumerated 2006.

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

National Provider Identifier

1881780013

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Registry record

Entity type Individual (Type 1)

Name Mrs. Mathilda Klupsteen

Credential MD

Sex Female

Practice address 3801 San Dimas #B, Bakersfield, CA, 93301

Phone (661) 631-2229

Fax (661) 631-2638

Enumeration date Oct 5, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2080N0001X Neonatal-Perinatal Medicine Physician Allopathic & Osteopathic Physicians · License C42623 (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

Is NPI 1881780013 active?

Yes, as of the latest NPPES snapshot, NPI 1881780013 is active (record last updated 2007-07-08).

How do I verify Mathilda Klupsteen's NPI record?

Cross-check NPI 1881780013 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.