● Active Type 1 · Individual

Brian Duffy

Internal Medicine·Houston, TX· NPI 1417451030 · Enumerated 2018 · 8 years on NPI

Duffy is 1 of 1938 internal medicine providers in Houston and 1 of 12343 in Texas.

NPI age

8 years

Enumerated 2018-03-20

Primary specialty

Internal Medicine

Plus 14 subspecialties

Licensed in

TX, AL, DE, AZ, HI, TN, IN, CO, NC, WA, GA, UT, OK, MO, IA

15 states

Status

Active

No deactivations on record

Last NPPES update

2026-04-09

Source: monthly bulk 2026-05

Sole proprietor

May be part of a larger org

How this provider compares

Across 12343 active internal medicine providers in Texas.

NPI age

8 years

↓ 9 yr below median (17 yr)

State licenses

15 states

Top 88% — 12% of peers are multi-state

Subspecialties

33% of peers hold subspecialties

NPI lifetime · 2018 → 2026

2018-03Enumerated in NPPES

2018 2026

Where they practice

Practice location

1201 Fannin St Ste 262

Houston, TX 770026943

📞 8668490692

Mailing address

Po Box 211699

Eagan, MN 551213699

📞 8668490692

Additional practice locations

1 secondary location on file with NPPES.

Location 2

5323 Harry Hines Blvd

Dallas, TX 753907201

📞 2146489741

Specialties

Allopathic & Osteopathic Physicians › Internal Medicine

Internal Medicine Primary

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,...

TX license #T0772AL license #53499DE license #C1-0029319AZ license #80203HI license #MD-26705TN license #77156IN license #01099404ACO license #CDR.0006624NC license #2026-01212WA license #MD70104739GA license #110890UT license #14275320-1235OK license #47649MO license #2026012934IA license #MD-56655 taxonomy 207R00000X

Practice context

Part of a multi-provider practice. 43 other active providers share this practice address in NPPES.

Recently enumerated nearby: 6 new internal medicine providers have 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.