Mary Suzanne Nguyen, M.D.
Family Medicine Physician · Castroville, TX
Mary Suzanne Nguyen, M.D. is a family medicine physician with a practice address in Castroville, Texas, and NPI 1356339717, issued on Oct 10, 2005. Check the license (Texas K5365, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mary Suzanne Nguyen
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- K5365 TX
Self-reported in NPPES; status is on the state search - Practice location
- 409 Madrid St, Castroville, TX 78009
- Phone
- (830) 538-2254
- Enumerated
- Oct 10, 2005
- Record last updated
- May 21, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (830) 931-2259
- Medicare enrollment
- Enrolled (PECOS I20100826000415); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At Houston, 1997
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 11,119 in Texas → Look up another NPI →
Also registered at 409 Madrid St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sarah Carpenter, FNPFamily Nurse Practitioner1992481659
- Lloyd Vanwinkle, MDFamily Medicine Physician1306833173
Verify Mary Suzanne Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license K5365Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% more Medicare Part D claims than the average family medicine physician in 2024
6,727 Medicare Part D claims for 485 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 199 claims were for opioids.
Most prescribed
- Atorvastatin Calcium348 claims
- Rosuvastatin Calcium290 claims
- Amlodipine Besylate268 claims
- Lisinopril237 claims
- Levothyroxine Sodium227 claims
- Losartan Potassium153 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.
Industry payments in 2024: $1,541.07
85 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Lloyd P Van Winkle, MD, PACastroville, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Suzanne Nguyen among 11,119 family medicine physician records in Texas
Mary Suzanne Nguyen, M.D. 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
- Graduated1997 · median 2004 among the 7,095 with a school on file
- Record last updated2013 · 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).
7 family medicine physician records list a practice address in Castroville
They are 7 of the 88 NPPES records with a practice address in Castroville, and 11,119 family medicine physician records in Texas.
All 11,119 in Texas → Every provider in Castroville → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Max Best, M.D.Castroville, TX 780091497786347
- Ann Black, MDCastroville, TX 780091750329801
- John Meyer, M.D.Castroville, TX 780091194724625
- Emily Meyer, M.D.Castroville, TX 780091558459446
- Bobby Pittman, M.D.Castroville, TX 780091053411546
- Lloyd Vanwinkle, MDCastroville, TX 780091306833173
- Bryan Davis, D.O.Center Point, TX 780101578790473
- Lydia Avila, M.D.Boerne, TX 780061982825964
Common questions
What is Mary Suzanne Nguyen, M.D.'s NPI number?
Mary Suzanne Nguyen, M.D.'s National Provider Identifier (NPI) is 1356339717, issued on Oct 10, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mary Suzanne Nguyen, M.D. located?
The NPPES record lists a practice address at 409 Madrid St, Castroville, TX, 78009. Phone: (830) 538-2254. Providers update this record themselves, so call before visiting.
How can I verify Mary Suzanne Nguyen, M.D.'s license?
NPPES lists Texas license number K5365, 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 Mary Suzanne Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Mary Suzanne Nguyen, M.D. had 6,727 Medicare Part D claims for 485 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.