Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mitchell Bernsen, M.D.

Gastroenterology Physician in Arlington Heights, IL · enumerated 2005.

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

National Provider Identifier

1275523631

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Registry record

Entity type Individual (Type 1)

Name Mitchell Bernsen

Credential M.D.

Sex Male

Practice address 1415 S Arlington Heights Rd, Arlington Heights, IL, 60005

Phone (847) 439-1005

Fax (847) 439-7555

Enumeration date Oct 26, 2005

Last updated in NPPES Feb 19, 2015

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 036-084785 (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
036-084785	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 1275523631 active?

Yes, as of the latest NPPES snapshot, NPI 1275523631 is active (record last updated 2015-02-19).

How do I verify Mitchell Bernsen's NPI record?

Cross-check NPI 1275523631 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 2015-02-19.