Mark Denton Westbrook, MD
Family Medicine Physician · Spring, TX
Mark Denton Westbrook, MD is a family medicine physician with a practice address in Spring, Texas, and NPI 1548258734, issued on Oct 11, 2005. Check the license (Texas G3902, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark Denton Westbrook
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G3902 TX
Self-reported in NPPES; status is on the state search - Practice location
- 21309 Foster RD Ste 100, Spring, TX 77388
- Phone
- (281) 587-1700
- Enumerated
- Oct 11, 2005
- Record last updated
- Sep 8, 2022
- Fax
- (281) 907-6003
- Medicare enrollment
- Enrolled (PECOS I20040325000499); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At Houston, 1982
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 11,119 in Texas → Look up another NPI →
Also registered at 21309 Foster RD Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tanya Casagrande, PA-CPhysician Assistant1053070300
- Lauren Thomson, PAPhysician Assistant1215695291
Verify Mark Denton Westbrook in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license G3902Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% more Medicare Part D claims than the average family medicine physician in 2024
5,235 Medicare Part D claims for 603 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 183 claims were for opioids.
Most prescribed
- Atorvastatin Calcium246 claims
- Amlodipine Besylate197 claims
- Levothyroxine Sodium182 claims
- Zolpidem Tartrate132 claims
- Rosuvastatin Calcium113 claims
- Pantoprazole Sodium111 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.
Bills Medicare through one group practice
- Ikp Family Medicine, P.A.Conroe, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Denton Westbrook among 11,119 family medicine physician records in Texas
Mark Denton Westbrook, MD is one of 11,119 family medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1982 · median 2004 among the 7,095 with a school on file
- Record last updated2022 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
67 family medicine physician records list a practice address in Spring
They are 67 of the 3,758 NPPES records with a practice address in Spring, and 11,119 family medicine physician records in Texas.
All 11,119 in Texas → Every provider in Spring → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Timothy Irvine, MDSpring, TX 773881780607382
- Rohit Kashyap, MDSpring, TX 773881942220728
- Minni Malhotra, MDSpring, TX 773881528257508
- Alejandra Palmeros-Irvine, MDSpring, TX 773881154341915
- Pratik Patel, M.D.Spring, TX 773881235572686
- Noureen Zohra, MDSpring, TX 773881265872097
- Leena Chacko, MDSpring, TX 773891346208279
- Darrell Dixon, M.D.The Woodlands, TX 773891003883398
Common questions
What is Mark Denton Westbrook, MD's NPI number?
Mark Denton Westbrook, MD's National Provider Identifier (NPI) is 1548258734, issued on Oct 11, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Denton Westbrook, MD located?
The NPPES record lists a practice address at 21309 Foster RD Ste 100, Spring, TX, 77388. Phone: (281) 587-1700. Providers update this record themselves, so call before visiting.
How can I verify Mark Denton Westbrook, MD's license?
NPPES lists Texas license number G3902, 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 Mark Denton Westbrook, MD prescribe under Medicare Part D?
In 2024, Mark Denton Westbrook, MD had 5,235 Medicare Part D claims for 603 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.