Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Richard W Mason, DO

Surgery Physician in Sandwich, IL · enumerated 2005.

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

National Provider Identifier

1003809625

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Registry record

Entity type Individual (Type 1)

Name Dr. Richard W Mason

Credential DO

Sex Male

Practice address 1 E Countyline Rd, Sandwich, IL, 60548

Phone (815) 786-2722

Fax (815) 786-6840

Enumeration date Aug 30, 2005

Last updated in NPPES Jan 7, 2021

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 03682889 (IL) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
1921614	Other	IL	BC/BS
036082819	Medicaid	IL	-

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 1003809625 active?

Yes, as of the latest NPPES snapshot, NPI 1003809625 is active (record last updated 2021-01-07).

How do I verify Richard Mason's NPI record?

Cross-check NPI 1003809625 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 2021-01-07.