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Dr. Gary Otto Siemons, M.D.

Colon & Rectal Surgery Physician in Voorhees, NJ · enumerated 2005.

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

National Provider Identifier

1427059930

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Registry record

Entity type Individual (Type 1)
Name Dr. Gary Otto Siemons
Credential M.D.
Sex Male
Practice address 502 Centennial Blvd, Suite 5, Voorhees, NJ, 08043
Phone (856) 429-8030
Fax (856) 428-2718
Enumeration date Aug 9, 2005
Last updated in NPPES Jul 25, 2018

Taxonomy & licenses

208C00000X Colon & Rectal Surgery Physician Allopathic & Osteopathic Physicians · License 25MA04074600 (NJ) 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
1655507 Medicaid NJ -

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 the NPI number for Gary Siemons?
The National Provider Identifier (NPI) for Gary Siemons is 1427059930, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gary Siemons practice?
The practice location on file with NPPES is in Voorhees, NJ. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-07-25.