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

Barbara S Drozdowski, MD

Dermatology Physician in Holland, MI · enumerated 2006 · practices at Barbara S. Drozdowski MD, PC.

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

National Provider Identifier

1134157720

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Registry record

Entity type Individual (Type 1)

Name Barbara S Drozdowski

Credential MD

Sex Female

Practice address Holland, MI, 49424

Phone (616) 738-3997

Fax (616) 738-3996

Enumeration date Jun 30, 2006

Last updated in NPPES Jul 30, 2025

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

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 4301078815 (MI) 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 Barbara Drozdowski?

The National Provider Identifier (NPI) for Barbara Drozdowski is 1134157720, a Type 1 (individual) record in the CMS NPPES registry.

Where does Barbara Drozdowski practice?

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

Other providers at this practice address

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Barbara S. Drozdowski MD, PC Specialist · Holland, MI NPI 1831372341

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-30.