Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert Gerald Appel, D.M.D.

General Practice Dentistry in Humble, TX · enumerated 2014 · practices at Dr. Robert G. Appel, Dmd, Pllc.

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

National Provider Identifier

1538575493

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert Gerald Appel

Credential D.M.D.

Sex Male

Practice address 80 Wilson Rd Ste C, Humble, TX, 77338

Phone (281) 446-2362

Fax (281) 446-1309

Enumeration date Jul 10, 2014

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 2901021316 (MI) Secondary

1223G0001X General Practice Dentistry Dental Providers · License 30287 (TX) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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 NPI 1538575493 active?

Yes, as of the latest NPPES snapshot, NPI 1538575493 is active (record last updated 2022-07-21).

How do I verify Robert Appel's NPI record?

Cross-check NPI 1538575493 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Dr. Robert G. Appel, Dmd, Pllc General Practice Dentistry · Humble, TX NPI 1588104400

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.