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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

LEONARD MATTANO M.D.
NPI 1558330829
Pediatrics - Pediatric Hematology-Oncology in Kalamazoo, MI

Active since March 17, 2006
601 JOHN ST, STE E-300, KALAMAZOO, MI 49007(269) 341-6350 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Leonard Mattano M.d. NPPES

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

LEONARD MATTANO M.D. (NPI 1558330829) is an individual pediatric hematology-oncology provider in Kalamazoo, Michigan, licensed in Michigan (4301405921) and active in the NPI registry since March 2006.

NPPES Registry Identity

NPI1558330829
Entity TypeIndividualMale
Primary Taxonomy2080P0207X
Provider Legal NameLEONARD MATTANOCredential: M.D.
Location Address601 JOHN ST, STE E-300Kalamazoo, MI 49007-5341
Mailing Address1000 Oakland DrKalamazoo, MI 49008-1282
Phone(269) 341-6350
Sole ProprietorNo
Enumeration DateMarch 17, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1558330829 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in MI · 4301405921
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
601 JOHN ST, Kalamazoo, MI 49007
Open in Google Maps ↗

Other Identifiers 2

Other3803901681Bcbs
Medicaid4184102MI

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.

DR. AMANDA KEATING WALKER D.O.
Obstetrics & Gynecology
601 JOHN ST, SUITE N1200
KALAMAZOO, MI 49007
Kalamazoo County (269) 341-7979
ANDREW W. WALKER MD
Emergency Medicine
601 JOHN ST
KALAMAZOO, MI 49007
Kalamazoo County (847) 404-6853
JUSTINE MELODIE OUDSEMA PA-C
Physician Assistant
601 JOHN ST, BOX 74
KALAMAZOO, MI 49007
Kalamazoo County (269) 341-8481
OCHUKO ANDREW OGHOR CRNA
Nurse Anesthetist, Certified Registered
601 JOHN ST
KALAMAZOO, MI 49007
Kalamazoo County (239) 341-7654
MARK J TIESZEN MD
Internal Medicine (Critical Care Medicine)
601 JOHN ST, SUITE M-510
KALAMAZOO, MI 49007
Kalamazoo County (269) 341-7762
DR. ERIC S SHAY M.D.
Internal Medicine
601 JOHN ST, SUITE M-170
KALAMAZOO, MI 49007
Kalamazoo County (269) 381-5060
EVGENIIA MORLEY RD
Dietitian, Registered
601 JOHN ST
KALAMAROO, MI 49007
Kalamazoo County (269) 341-6615
SELECT HOSPITALISTS, PLLC
Internal Medicine
601 JOHN ST
KALAMAZOO, MI 49007
Kalamazoo County (269) 341-7100

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 Leonard Mattano's NPI number?

The NPI number for Leonard Mattano is 1558330829. It was assigned to this individual provider in the NPPES registry on March 17, 2006.

Where is Leonard Mattano located?

Leonard Mattano practices at 601 John St Ste E-300, Kalamazoo, MI 49007. The listed phone number is (269) 341-6350.

What is Leonard Mattano's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.

When was this NPI record last updated?

The NPPES record for Leonard Mattano 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 23 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.