Charles Maxwell Shannon
Critical Care Medicine (Internal Medicine) Physician · Houston, TX
Charles Maxwell Shannon is a critical care medicine (internal medicine) physician with a practice address in Houston, Texas, and NPI 1659831584, issued on Mar 25, 2019. Check the license (Texas T7037, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Charles Maxwell Shannon
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- T7037 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1504 Taub Loop, Houston, TX 77030
- Phone
- (713) 873-8890
- Enumerated
- Mar 25, 2019
- Record last updated
- Aug 4, 2026
- Medicare enrollment
- Enrolled (PECOS I20260402000928); may accept Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2019
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 413 in Texas → Look up another NPI →
Also registered at 1504 Taub Loop
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Waleed Abdellatif, MBBCH, MSC, MSHPEDiagnostic Radiology Physician1629737770
- Roba Abousaway, MDStudent in an Organized Health Care Education/Training Program1396689360
- Shiny AbrahamNurse Practitioner1669857124
- Christina Ackerman-Banks, MDMaternal & Fetal Medicine Physician1568840494
Verify Charles Maxwell Shannon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license T7037Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
25 Medicare Part D claims, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Charles Maxwell Shannon among 413 critical care medicine (internal medicine) physician records in Texas
Charles Maxwell Shannon is one of 413 critical care medicine (internal medicine) physician records with a practice address in Texas. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 92% of them.
- NPI issued2019 · 92% of these records are older, 6% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 84% of these records are
- Graduated2019 · median 2007 among the 346 with a school on file
- Record last updated2026 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Texas
There are 413 critical care medicine (internal medicine) physician records in Texas.
All 413 in Texas → Every provider in Houston → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Bindu Akkanti, M.DHouston, TX 770301982663514
- Donna Calabrese, M.D.Houston, TX 770301538144845
- Christopher Cortes, M.D.Houston, TX 770301447258959
- John Crommett, M.D.Houston, TX 770301932141892
- Javier Finkielman, M.D.Houston, TX 770301083651962
- James Herlihy, M.D.Houston, TX 770301972555449
- David Powner, M.D.Houston, TX 770301417996356
- Iqbal Ratnani, M.D.Houston, TX 770301861440190
Common questions
What is Charles Maxwell Shannon's NPI number?
Charles Maxwell Shannon's National Provider Identifier (NPI) is 1659831584, issued on Mar 25, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Charles Maxwell Shannon located?
The NPPES record lists a practice address at 1504 Taub Loop, Houston, TX, 77030. Phone: (713) 873-8890. Providers update this record themselves, so call before visiting.
How can I verify Charles Maxwell Shannon's license?
NPPES lists Texas license number T7037, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Charles Maxwell Shannon prescribe under Medicare Part D?
In 2024, Charles Maxwell Shannon had 25 Medicare Part D claims; the average among critical care medicine (internal medicine) physician prescribers was 696. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.