Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ryan Diederich, MD

Plastic and Reconstructive Surgery Physician in Glen Carbon, IL · enumerated 2007.

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

National Provider Identifier

1942422498

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Registry record

Entity type Individual (Type 1)

Name Ryan Diederich

Credential MD

Sex Male

Practice address 4955 S State Route 159 Ste 1, Glen Carbon, IL, 62034

Phone (618) 288-7855

Fax (618) 288-7866

Enumeration date May 3, 2007

Last updated in NPPES Aug 21, 2024

Taxonomy & licenses

2086S0122X Plastic and Reconstructive Surgery Physician Allopathic & Osteopathic Physicians · License 125-050203 (IL) 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 Ryan Diederich?

The National Provider Identifier (NPI) for Ryan Diederich is 1942422498, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ryan Diederich practice?

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

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Taylor Terveer Family Nurse Practitioner · Glen Carbon, IL NPI 1861147282

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-08-21.