Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jonathan Scott Treisman, M. D.

Hematology & Oncology Physician in Franklin, WI · enumerated 2005 · practices at Ascension St Francis Hospital, Inc.

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

National Provider Identifier

1699778860

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Registry record

Entity type Individual (Type 1)

Name Jonathan Scott Treisman

Credential M. D.

Sex Male

Practice address 7410 W Rawson Ave, Franklin, WI, 53132

Phone (414) 427-2360

Fax (414) 427-6204

Enumeration date May 23, 2005

Last updated in NPPES Dec 10, 2013

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 36866 (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
32158900	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 Jonathan Treisman?

Jonathan Treisman is registered in NPPES with the primary taxonomy of Hematology & Oncology 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 →

Oh Hoon Kwon Radiation Oncology Physician · Franklin, WI NPI 1215981956 Michael Christensen Radiation Oncology Physician · Franklin, WI NPI 1497911275 Deanna Birling Nurse Practitioner · Franklin, WI NPI 1316218225 Victoria Anderson Genetic Counselor (M.S.) · Franklin, WI NPI 1801210117 Rachel Coburn Genetic Counselor (M.S.) · Franklin, WI NPI 1285050849 Ascension St Francis Hospital, Inc General Practice Physician · Franklin, WI NPI 1073079455

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-12-10.