Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Diem T. Nguyen, OD

Individual provider Optometrist · NPI 1669554812

Diem T. Nguyen, OD is registered under Optometry in Easley, South Carolina. Graduated from New England College of Optometry in 2002, 24 years ago. Practices with Jervey Eye Group PA, a 20-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in South Carolina and Virginia.

Years since qualifying
24
Trained at
New England College of Optometry
Licensed in
SC, VA
In the registry since
2006
Specialties on file
2
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

220 S Pendleton St
Easley, SC 29640-3048
Phone: (864) 859-3233
Fax: (864) 850-4001
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 601 Halton Rd, Greenville, SC 29607-3403 — (864) 458-7956

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 2301 (SC)
Optometrist Taxonomy 152W00000X · Licence 0618-001238 (VA)

Record details

NPI number1669554812
Entity typeIndividual (Type 1)
GenderFemale
Credentials OD
Sole proprietorNo
NPI enumeratedOctober 19, 2006
Last updated in NPPESSeptember 22, 2025
Certification dateSeptember 22, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPTOMETRY
Medical schoolNEW ENGLAND COLLEGE OF OPTOMETRY
Graduated 2002 (24 years in practice)
Group practice Jervey Eye Group Pa — 20 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients554
Services billed 954 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $237 10 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at Jervey Eye Group PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 20 clinicians in the practice; 12 are shown here.

Other providers in Easley