● Active Type 1 · Individual

James Kennedy O'Neill, M.D.

Internal Medicine·Houston, TX· NPI 1770878670 · Enumerated 2011 · 14 years on NPI

O'Neill is 1 of 108 internal medicine providers in Houston and 1 of 883 in Texas.

NPI age

14 years

Enumerated 2011-06-20

Primary specialty

Internal Medicine

Plus 3 subspecialties

Licensed in

TX, MO

2 states

Status

Active

No deactivations on record

Last NPPES update

2025-08-12

Source: monthly bulk 2026-05

Sole proprietor

Yes

Solo practice on file

How this provider compares

Across 883 active internal medicine providers in Texas.

NPI age

14 years

↓ 3 yr below median (17 yr)

State licenses

2 states

Top 78% — 21% of peers are multi-state

Subspecialties

In the 72% of peers with subspecialties

NPI lifetime · 2011 → 2026

2011-06Enumerated in NPPES

2011 2026

Where they practice

Practice location

925 Gessner Rd Ste 630

Houston, TX 770242553

📞 7134653535fax 7134659735

Mailing address

925 Gessner Rd, Ste 630

Houston, TX 770242553

📞 8323556676

Additional practice locations

1 secondary location on file with NPPES.

Location 2

6720 Bertner Ave # Mc1-133

Houston, TX 770302604

📞 8323556676

Specialties

Allopathic & Osteopathic Physicians › Internal Medicine

Internal Medicine Primary

An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical...

TX license #Q3933 taxonomy 207RI0011X
Internal Medicine

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer,...

MO license #2011016934TX license #Q3933 taxonomy 207R00000X
Internal Medicine

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

TX license #Q3933 taxonomy 207RC0000X

Practice context

Part of a multi-provider practice. 2 other active providers share this practice address in NPPES.

Recently enumerated nearby: 1 new internal medicine provider has been added in Houston in the last 180 days. See all →

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How to verify this provider

Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
Check the state license is currently active.State licensing boards publish current status; NPPES does not.
Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.