Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

FEMI B AYANRINO MD
NPI 1619962180
Internal Medicine - Critical Care Medicine in Appleton, WI

Q: What is Femi Ayanrino's NPI number?

The NPI number for Femi Ayanrino is 1619962180. It was assigned to this individual provider in the NPPES registry on September 12, 2005.

Q: What is Femi Ayanrino's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Q: When was this NPI record last updated?

The NPPES record for Femi Ayanrino was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since September 12, 2005

1506 S ONEIDA ST, APPLETON, WI 54915(920) 738-2000 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

On this page

About Femi B Ayanrino Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

FEMI B AYANRINO MD (NPI 1619962180) is an individual critical care medicine provider in Appleton, Wisconsin, licensed in Wisconsin (47045) and active in the NPI registry since September 2005.

NPPES Registry Identity

NPI1619962180

Entity TypeIndividualMale

Primary Taxonomy207RC0200X

Provider Legal NameFEMI B AYANRINOCredential: MD

Location Address1506 S ONEIDA STAppleton, WI 54915-1305

Mailing Address1506 S Oneida StAppleton, WI 54915-1305 · (920) 738-2000

Phone(920) 738-2000

Sole ProprietorNo

Enumeration DateSeptember 12, 2005

Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration

✔ NPI 1619962180 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Critical Care MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207RC0200X

License✔ Licensed in WI · 47045

Definition

An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.

Also ListedHospitalistTaxonomy 208M00000X · License 47045 (WI)

1506 S ONEIDA ST, Appleton, WI 54915

Open in Google Maps ↗

Other Identifiers 1

Medicaid34549500WI

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

FOX VALLEY NEONATOLOGY SC

Pediatrics (Neonatal-Perinatal Medicine)

1506 S ONEIDA ST
APPLETON, WI 54915

Calumet County (920) 738-2000

ASCENSION NE WISCONSIN, INC

Skilled Nursing Facility

1506 S ONEIDA ST
APPLETON, WI 54915

Calumet County (920) 720-1464

KAYLA MARIE LETTERMAN DPT

Physical Therapist

1506 S ONEIDA ST
APPLETON, WI 54915

Calumet County (920) 738-2681

BESSANT A PARKER MD

Hospitalist

1506 S ONEIDA ST, HOSPITAL SERVICE DEPARTMENT
APPLETON, WI 54915

Calumet County (920) 738-2000

DR. JOSEPH DOMINIC CHABOT D.O.

Neurological Surgery

1506 S ONEIDA ST
APPLETON, WI 54915

Calumet County (920) 738-2000

PANKAJ JAIN

Pediatrics (Neonatal-Perinatal Medicine)

1506 S ONEIDA ST
APPLETON, WI 54915

Calumet County (920) 730-7670

SAMUEL A. SOUTHARD CRNA

Nurse Anesthetist, Certified Registered

1506 S ONEIDA ST
APPLETON, WI 54915

Calumet County (920) 738-2000

ELLEN CHRISTIAANSEN

Speech-Language Pathologist

1506 S ONEIDA ST
APPLETON, WI 54915

Calumet County (920) 738-2960

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Femi Ayanrino's NPI number?

The NPI number for Femi Ayanrino is 1619962180. It was assigned to this individual provider in the NPPES registry on September 12, 2005.

Where is Femi Ayanrino located?

Femi Ayanrino practices at 1506 S Oneida St, Appleton, WI 54915. The listed phone number is (920) 738-2000.

What is Femi Ayanrino's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

When was this NPI record last updated?

The NPPES record for Femi Ayanrino was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.