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CHARLES MAXWELL SHANNON
NPI 1659831584
Internal Medicine - Critical Care Medicine in Houston, TX

Active since March 25, 2019PECOS Enrolled
1504 TAUB LOOP, HOUSTON, TX 77030(713) 798-1000 Get Directions Write a Review

NPPES record last updated: March 27, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Charles Maxwell Shannon NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CHARLES MAXWELL SHANNON (NPI 1659831584) is an individual critical care medicine provider in Houston, Texas, licensed in Texas (T7037) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, maintains a secondary practice location in Houston, and is a graduate of Baylor College Of Medicine (2019).

NPPES Registry Identity

NPI1659831584
Entity TypeIndividualMale
Primary Taxonomy207RC0200X
Provider Legal NameCHARLES MAXWELL SHANNON
Location Address1504 TAUB LOOPHouston, TX 77030-1608
Mailing Address7010 Staffordshire Blvd Apt 147Houston, TX 77030-4128 · (214) 546-5308
Phone(713) 798-1000
Sole ProprietorYes
Medical School CMSBaylor College Of MedicineGraduated 2019
Enumeration DateMarch 25, 2019
Last NPPES UpdateMarch 27, 2026
NPPES CertifiedMarch 27, 2026
✔ NPI 1659831584 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RC0200X
License✔ Licensed in TX · T7037
Definition
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 primary physician, the critical care staff and other specialists.
Also ListedInternal Medicine · Pulmonary DiseaseTaxonomy 207RP1001X · License T7037 (TX)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1504 TAUB LOOP, Houston, TX 77030
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Secondary Practice Location 1

Location 11 Baylor PlzHouston, TX 77030-3498 · Phone (214) 546-5308

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Charles Maxwell Shannon is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID4981189479
PECOS Enrollment IDI20260402000928
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77030 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$134.06 typical visit price
range $58.24 – $176.98
Typical copayment $33.51 (range $14.56 – $44.24)
Most-billed visit code 99204
Established Patient
$102.71 typical visit price
range $18.60 – $143.93
Typical copayment $25.67 (range $4.65 – $35.98)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ZAVEN SARGSYAN MD
Internal Medicine
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 873-8890
KAYE-ANN ANTONETTE CHRISTIE PA-C
Physician Assistant
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 873-2000
EMILY MARIE WEBSTER PA-C
Physician Assistant
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 873-8890
DR. MIGUEL A NIETO D.O.
Emergency Medicine
1504 TAUB LOOP, EMERGENCY CENTER
HOUSTON, TX 77030
Harris County (713) 873-7045
DR. LOUIS BRUNO FORNAGE MD
Emergency Medicine
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 873-3060
EMMA NAPOLI
Internal Medicine (Infectious Disease)
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 873-2309
DR. MICHELE TROUTMAN GIFFORD MD
Obstetrics & Gynecology
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 798-1750
DR. KYLE SUEN M.D.
Emergency Medicine
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 873-8890

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Charles Shannon's NPI number?

The NPI number for Charles Shannon is 1659831584. It was assigned to this individual provider in the NPPES registry on March 25, 2019.

Where is Charles Shannon located?

Charles Shannon practices at 1504 Taub Loop, Houston, TX 77030. The listed phone number is (713) 798-1000.

What is Charles Shannon's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Is Charles Shannon enrolled in Medicare?

Yes. Charles Shannon is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Charles Shannon was last updated on March 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.