Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Frederick Wissinger, MD

Internal Medicine Physician in El Campo, TX · enumerated 2006.

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

National Provider Identifier

1558326876

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Registry record

Entity type Individual (Type 1)

Name Dr. John Frederick Wissinger

Credential MD

Sex Male

Practice address 1602 N Mechanic St, El Campo, TX, 77437

Phone (979) 543-2956

Fax (979) 543-6756

Enumeration date Apr 19, 2006

Last updated in NPPES Dec 5, 2012

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G3918 (TX) 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
P00403974	Other	TX	RAILROAD GBA - RAILROAD MEDICARE
P01090558	Other	TX	RAILROAD MEDICARE PTAN
119167803	Medicaid	TX	-
119167804	Medicaid	TX	-
887914	Other	TX	BC/BS TX#
8DE552	Other	TX	BC/BS #

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.

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Frequently asked questions

What is the NPI number for John Wissinger?

The National Provider Identifier (NPI) for John Wissinger is 1558326876, a Type 1 (individual) record in the CMS NPPES registry.

Where does John Wissinger practice?

The practice location on file with NPPES is in El Campo, TX. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-12-05.