Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ferdinand C Casis, MD,FACE

Endocrinology, Diabetes & Metabolism Physician in Green Bay, WI · enumerated 2006.

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

National Provider Identifier

1841209806

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Ferdinand C Casis

Credential MD,FACE

Sex Male

Practice address 720 S Vanburen St, Suite 104, Green Bay, WI, 54301

Phone (920) 433-6050

Fax (920) 433-6049

Enumeration date Aug 7, 2006

Last updated in NPPES Sep 5, 2018

Taxonomy & licenses

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License 4301102839 (MI) Primary

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License 47960 (WI) Secondary

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
34635100	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 Ferdinand Casis?

Ferdinand Casis is registered in NPPES with the primary taxonomy of Endocrinology, Diabetes & Metabolism Physician. 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.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-05.