● Active Type 1 · Individual

Charles Maxwell Shannon

Internal Medicine·Houston, TX· NPI 1659831584 · Enumerated 2019 · 7 years on NPI

Shannon is 1 of 141 internal medicine providers in Houston and 1 of 479 in Texas.

NPI age

7 years

Enumerated 2019-03-25

Primary specialty

Internal Medicine

Plus 2 subspecialties

Licensed in

1 state

Status

Active

No deactivations on record

Last NPPES update

2026-03-27

Source: monthly bulk 2026-05

Sole proprietor

Yes

Solo practice on file

How this provider compares

Across 479 active internal medicine providers in Texas.

NPI age

7 years

↓ 9 yr below median (16 yr)

State licenses

1 state

32% of peers hold multiple states

Subspecialties

In the 79% of peers with subspecialties

NPI lifetime · 2019 → 2026

2019-03Enumerated in NPPES

2019 2026

Where they practice

Practice location

1504 Taub Loop

Houston, TX 770301608

📞 7137981000

Mailing address

7010 Staffordshire Blvd Apt 147

Houston, TX 770304128

📞 2145465308

Additional practice locations

1 secondary location on file with NPPES.

Location 2

1 Baylor Plz

Houston, TX 770303498

📞 2145465308

Specialties

Allopathic & Osteopathic Physicians › Internal Medicine

Internal Medicine Primary

An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the...

TX license #T7037 taxonomy 207RC0200X
Internal Medicine

An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex...

TX license #T7037 taxonomy 207RP1001X
Student in an Organized Health Care Education/Training Program

An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.

taxonomy 390200000X

Practice context

Part of a multi-provider practice. 995 other active providers share this practice address in NPPES.

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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.