Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Wen Tjoen Yap, M.D.

Specialist in Green Bay, WI · enumerated 2005.

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

National Provider Identifier

1164424818

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Registry record

Entity type Individual (Type 1)

Name Dr. Wen Tjoen Yap

Credential M.D.

Sex Male

Practice address 720 S Van Buren St, Suite 301, Green Bay, WI, 54301

Phone (920) 433-9400

Fax (940) 433-9409

Enumeration date Aug 12, 2005

Last updated in NPPES Jan 18, 2016

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 46447 (WI) 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
3402210621	Other	MI	BLUE CROSS MI
34478000	Medicaid	WI	-
4744066	Medicaid	MI	-

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 Wen Yap?

Wen Yap is registered in NPPES with the primary taxonomy of Specialist. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-18.