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

Mr. John Dennis Berg, CRNA APNP

Certified Registered Nurse Anesthetist in Oshkosh, WI · enumerated 2005.

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

National Provider Identifier

1407838824

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Registry record

Entity type Individual (Type 1)

Name Mr. John Dennis Berg

Credential CRNA APNP

Sex Male

Practice address Oshkosh, WI, 54904

Phone (920) 410-0472

Fax (920) 235-8915

Enumeration date Nov 20, 2005

Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License 67892-030 (WI) Primary

Other identifiers

Identifier	Type	State	Issuer
67892-030	Other	WI	NURSING LICENSE
383-033	Other	-	APNP
31946	Other	WI	AANA CERTIFICATION
43299100	Medicaid	WI	-

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 specialty is John Berg?

John Berg is registered in NPPES with the primary taxonomy of Certified Registered Nurse Anesthetist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.