Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Eric Van Mastrolonardo, MD

Otolaryngology Physician in Saint Louis, MO · enumerated 2021 · practices at Barnes Jewish Hospital.

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

National Provider Identifier

1376122101

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Eric Van Mastrolonardo

Credential MD

Sex Male

Practice address 4500 Forest Park Ave, Dept Otolaryngology, 5th Fl, Saint Louis, MO, 63108

Phone (314) 362-7509

Fax (888) 452-4025

Enumeration date Apr 7, 2021

Last updated in NPPES Jul 7, 2026

Taxonomy & licenses

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License 2026004588 (MO) 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
200173705	Medicaid	MO	-

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 Eric Mastrolonardo?

Eric Mastrolonardo is registered in NPPES with the primary taxonomy of Otolaryngology 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 →

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