Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Cassia Victoria Zarzuela, M.D.

Pediatrics Physician in Oswego, IL · enumerated 2009.

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

National Provider Identifier

1700012713

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Cassia Victoria Zarzuela

Credential M.D.

Sex Female

Practice address 4789 Route 71, Oswego, IL, 60543

Phone (630) 898-5969

Fax (630) 898-5837

Enumeration date Jun 4, 2009

Last updated in NPPES Jan 11, 2024

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 036123389 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

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.

What specialty is Cassia Zarzuela?

Cassia Zarzuela is registered in NPPES with the primary taxonomy of Pediatrics Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Paul Granoff Pediatrics Physician · Oswego, IL NPI 1861445033 Jennifer Kurka Family Medicine Physician · Oswego, IL NPI 1245308873 Rush-Copley Medical Group Pediatrics Physician · Oswego, IL NPI 1629265764 Rush-Copley Medical Group, Nfp Obstetrics & Gynecology Physician · Oswego, IL NPI 1508055351 Parul Bhatt Pediatrics Physician · Oswego, IL NPI 1427234426 Nicole Keller Pediatrics Physician · Oswego, IL NPI 1316214240 Virginia Hathcock Nurse Practitioner · Oswego, IL NPI 1497020234 Nicole Marks Family Nurse Practitioner · Oswego, IL NPI 1477952729

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-11.