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Mark T Hellner MD Inc

Orthopaedic Surgery Physician in Merced, CA · enumerated 2010 · authorized official Mark Hellner, Owner.

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

National Provider Identifier

1134442544

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Registry record

Entity type Organization (Type 2)
Legal business name Mark T Hellner MD Inc
Practice address 900 W Olive Ave, Suite A, Merced, CA, 95348
Phone (209) 388-0730
Fax (209) 388-0731
Enumeration date Mar 12, 2010
Last updated in NPPES Aug 31, 2010

Taxonomy & classification

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License G52055 (CA) Primary

Authorized official

Name Mark Hellner
Title Owner
Phone (209) 388-0730

Other identifiers

Identifier Type State Issuer
00G520550 Medicaid CA -

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 Mark T Hellner MD Inc?
Mark T Hellner MD Inc is registered in NPPES as a Orthopaedic Surgery 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 2010-08-31.