Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jonathan Maltz, M.D.

Adult Medicine Physician in Olney, MD · enumerated 2005.

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

National Provider Identifier

1326041179

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Registry record

Entity type Individual (Type 1)

Name Jonathan Maltz

Credential M.D.

Sex Male

Practice address 3300 Olney Sandy Spring Rd Ste 330, Olney, MD, 20832

Phone (301) 774-7334

Fax (301) 774-7311

Enumeration date May 24, 2005

Last updated in NPPES Feb 16, 2010

Taxonomy & licenses

207QA0505X Adult Medicine Physician Allopathic & Osteopathic Physicians · License D0021057 (MD) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Jonathan Maltz?

Jonathan Maltz is registered in NPPES with the primary taxonomy of Adult Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-16.