NPPES file of Aug 9, 2026

Sien Chen, M.D.

Glaucoma Specialist (Ophthalmology) Physician · Fort Sam Houston, TX

Sien Chen, M.D. is a glaucoma specialist (ophthalmology) physician with a practice address in Fort Sam Houston, Texas, and NPI 1326452210, issued on Jun 18, 2014. Check the license on the Texas Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1326452210
Name
Sien Chen
Credential
M.D.
Primary taxonomy
Glaucoma Specialist (Ophthalmology) Physician 207WX0009X
License numbers
303514 NY
28779 NE
Self-reported in NPPES; status is on the state search
Practice location
3551 Roger Brooke Dr, Fort Sam Houston, TX 78234
Phone
(210) 539-9582
Enumerated
Jun 18, 2014
Record last updated
Feb 5, 2026
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest glaucoma specialist (ophthalmology) physician records → All 30 in Texas → Look up another NPI →

Also registered at 3551 Roger Brooke Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Adrianna Adams, LCSWClinical Social Worker1275265456
  2. John AdamsGeneral Practice Physician1134754898
  3. Jordan Adams, PAPhysician Assistant1336876598
  4. Oluwole Afuape, OTR/LOccupational Therapist1033593561
  5. Pierre Monverdy Agnant, MD, MPH, MBA, MACCInternal Medicine Physician1669868568
  6. Della Agquiz, PHARMDOncology Pharmacist1700538741

Verify Sien Chen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical BoardCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Texas license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Industry payments in 2024: $232.30

2 payments; by number, the most common kind was food and beverage; the largest payer was Bausch & Lomb Americas Inc. The 391 providers of this specialty with any payment received $5,284.60 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Sien Chen$232.30
  2. Specialty average$5,284.60

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Sien Chen among 30 glaucoma specialist (ophthalmology) physician records in Texas

Sien Chen, M.D. is one of 30 glaucoma specialist (ophthalmology) physician records with a practice address in Texas. 100% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 50% of them.

  • NPI issued2014 · 50% of these records are older, 43% newer
  • In a Medicare fileYes · 100% of these records are
  • In the CMS Doctors and Clinicians fileNo · 80% of these records are
  • Record last updated2026 · 7% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207WX0009X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Glaucoma Specialist (Ophthalmology) Physician providers in Texas

There are 30 glaucoma specialist (ophthalmology) physician records in Texas.

All 30 in Texas → Every provider in Fort Sam Houston → Glaucoma Specialist (Ophthalmology) Physician nationwide →

The 8 glaucoma specialist (ophthalmology) physician records with the nearest ZIP codes

  1. Jared Kelstrom, MDJbsa Lackland, TX 782361205916053
  2. Andrew Lewis, MDJbsa Lackland, TX 782361770806010
  3. Alexandra Schulte, MDJbsa Lackland, TX 782361235695412
  4. Andrew Gross, MDSan Antonio, TX 782291164983094
  5. Humberto Salazar, MDSan Antonio, TX 782181356846547
  6. He Li, MDVictoria, TX 779041023542495
  7. Giovanni Campagna, MDFredericksburg, TX 786241760942684
  8. Robert Marquis, M.D., PH.D.Austin, TX 787311902881048

Common questions

What is Sien Chen, M.D.'s NPI number?

Sien Chen, M.D.'s National Provider Identifier (NPI) is 1326452210, issued on Jun 18, 2014. An NPI identifies a provider in billing; it is not a license.

Where is Sien Chen, M.D. located?

The NPPES record lists a practice address at 3551 Roger Brooke Dr, Fort Sam Houston, TX, 78234. Phone: (210) 539-9582. Providers update this record themselves, so call before visiting.

How can I verify Sien Chen, M.D.'s license?

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.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.