Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Richard H Bertenshaw Jr., MD

Endocrinology, Diabetes & Metabolism Physician in Darien, IL · enumerated 2006.

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

National Provider Identifier

1992721898

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Registry record

Entity type Individual (Type 1)

Name Dr. Richard H Bertenshaw Jr.

Credential MD

Sex Male

Practice address 7545 Wilton Rd, Darien, IL, 60561

Phone (708) 921-6053

Fax (877) 992-6901

Enumeration date Jul 14, 2006

Last updated in NPPES Aug 3, 2021

Taxonomy & licenses

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License 036074851 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
1609994987	Other	IL	GROUP PRACTICE NPI
C30167	Other	IL	RAILROAD MEDICARE PTAN

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

How do I verify Richard Bertenshaw's NPI record?

Cross-check NPI 1992721898 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1992721898 active?

Yes, as of the latest NPPES snapshot, NPI 1992721898 is active (record last updated 2021-08-03).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-08-03.