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John Charles Maerz Jr MD

Pediatrics Physician in Johnson City, NY · enumerated 2007 · authorized official John Maerz, Owner.

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

National Provider Identifier

1285753376

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Registry record

Entity type Organization (Type 2)
Legal business name John Charles Maerz Jr MD
Other name <Unavail>
Practice address 27 Jennison Ave, Johnson City, NY, 13790
Phone (607) 770-4543
Fax (607) 770-0826
Enumeration date Mar 28, 2007
Last updated in NPPES Jun 18, 2008

Taxonomy & classification

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 149892 (NY) Primary

Authorized official

Name John Maerz
Title Owner
Phone (607) 770-4543

Other identifiers

Identifier Type State Issuer
00711679 Medicaid NY -

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.

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Frequently asked questions

What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is John Charles Maerz Jr MD?
John Charles Maerz Jr MD is registered in NPPES as a Pediatrics Physician (its primary provider taxonomy).

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-18.