Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Maryanne Fishman, R.N., M.S., A.O.C.N.

Oncology Clinical Nurse Specialist in Chicago, IL · enumerated 2007.

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

National Provider Identifier

1184839656

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Registry record

Entity type Individual (Type 1)

Name Ms. Maryanne Fishman

Credential R.N., M.S., A.O.C.N.

Sex Female

Practice address 676 N Saint Clair St, Stem Cell Transplant Suite 1920, Chicago, IL, 60611

Phone (312) 695-6510

Fax (312) 926-2978

Enumeration date May 10, 2007

Last updated in NPPES Feb 21, 2020

Taxonomy & licenses

364SX0200X Oncology Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 209002552 (IL) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

Other identifiers

Identifier	Type	State	Issuer
209-002552	Other	IL	ADVANCED PRACTICE NURSE

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 Maryanne Fishman?

Maryanne Fishman is registered in NPPES with the primary taxonomy of Oncology Clinical Nurse 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 2020-02-21.