Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Charles J. Mallo, M.D.

Vascular Surgery Physician in Oak Ridge, TN · enumerated 2006.

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

National Provider Identifier

1558333492

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Charles J. Mallo

Credential M.D.

Sex Male

Practice address Oak Ridge, TN, 37830

Phone (865) 483-7030

Fax (865) 483-3954

Enumeration date Feb 5, 2006

Last updated in NPPES May 29, 2014

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 132331-1 (NY) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 132331 (NY) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 132331 (NY) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 49148 (TN) 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
00593242	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Charles Mallo?

The National Provider Identifier (NPI) for Charles Mallo is 1558333492, a Type 1 (individual) record in the CMS NPPES registry.

Where does Charles Mallo practice?

The practice location on file with NPPES is in Oak Ridge, TN. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-05-29.