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

Dr. Arthur Twining Hadley III, MD

Family Medicine Physician in Katy, TX · enumerated 2007 · practices at Arthur Hadley MD PA.

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

National Provider Identifier

1720120579

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Registry record

Entity type Individual (Type 1)

Name Dr. Arthur Twining Hadley III

Credential MD

Sex Male

Practice address Katy, TX, 77450

Phone (281) 597-1010

Fax (281) 597-0015

Enumeration date Feb 12, 2007

Last updated in NPPES Nov 11, 2008

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

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License G1912 (TX) 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

Where does Arthur Hadley practice?

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

What is the NPI number for Arthur Hadley?

The National Provider Identifier (NPI) for Arthur Hadley is 1720120579, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Arthur Hadley MD PA Community/Retail Pharmacy · Katy, TX NPI 1295916278

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-11-11.