Doctor profile · Federal record
Dr. Diem Nguyen, O.D.
Optometrist (CMS: Optometry) · Optometrist · Easley, SC
- NPI 1669554812
- Accepts Medicare
- 24 yrs in practice
- Licensed in 2 states
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
220 S Pendleton St
Easley, SC 296403048
(864) 859-3233
fax (864) 850-4001 - Additional location
-
601 Halton RD
Greenville, SC 296073403
(864) 458-7956
fax (864) 458-8390 - Mailing address
-
601 Halton RD
Greenville, SC 296073403
Credentials & registration
- NPI registered
- October 2006 — 20 yrs on file
- Profile last updated
- September 22, 2025
- Year of graduation
- 2002 — 24 yrs since
- Specialty taxonomy
- 152W00000X — NUCC code
- State licenses (2)
- South Carolina #2301 · Virginia #0618-001238
- Medicaid
- SC #D23017
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1669554812. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
970
Distinct HCPCS
10
Medicare allowed
$80,839
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
92014 |
Established patient complete exam of visual system | 341 | 333 | $118 | |
92250 |
Photography of the retina | 151 | 151 | $35 | |
92004 |
New patient complete exam of visual system | 79 | 79 | $141 | |
92133 |
Imaging of optic nerve | 78 | 78 | $33 | |
92012 |
Established patient problem focused exam of visual system | 69 | 61 | $84 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 55 | 49 | $121 | |
83861 |
Microfluid analysis of tears | 54 | 27 | $22 | |
92083 |
Exam of visual field with extended testing | 54 | 54 | $58 | |
92134 |
Imaging of retina | 39 | 39 | $37 | |
76514 |
Ultrasound scan of cornea to determine thickness | 23 | 23 | $10 |
In context: peer comparison
Among 1 peers in Easley Optometrist, average services per provider: 80. This provider delivers 12× the peer median.Open Payments
Industry payments received
All-time total
$108
Transactions
5
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Oyster Point Pharma, INC. | 2 | $40.52 | |
| Bausch & Lomb Americas INC. | 2 | $39.91 | |
| Tarsus Pharmaceuticals, INC. | 1 | $27.82 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,170
Patients
478
Total drug cost
$145,737
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Latanoprost | Generic | 418 | 163 | $11,952 |
| Brimonidine Tartrate | Generic | 162 | 64 | $2,923 |
| Timolol Maleate | Generic | 150 | 71 | $2,781 |
| Dorzolamide Hcl | Generic | 115 | 47 | $3,843 |
| Tobramycin-Dexamethasone (Tobramycin/Dexamethasone) | Brand | 61 | 51 | $3,941 |
| Prednisolone Acetate | Generic | 56 | 31 | $3,028 |
| Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) | Brand | 47 | 19 | $2,519 |
| Restasis (Cyclosporine) | Brand | 35 | 16 | $53,997 |
| Lumigan (Bimatoprost) | Brand | 28 | 16 | $17,149 |
| Brimonidine Tartrate-Timolol (Brimonidine Tartrate/Timolol) | Brand | 25 | 0 | $6,507 |
Frequently asked questions
What is Dr. Diem Nguyen's medical specialty?
Dr. Diem Nguyen practices Optometrist in Easley, SC.
Where does Dr. Diem Nguyen practice?
Dr. Diem Nguyen practices at 220 S Pendleton St, Easley, SC 296403048. Office phone: 8648593233.
What is Dr. Diem Nguyen's NPI?
Dr. Diem Nguyen's National Provider Identifier (NPI) is 1669554812, issued by NPPES.
Does Dr. Diem Nguyen accept Medicare assignment?
Yes. Dr. Diem Nguyen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Diem Nguyen commonly perform?
Top Medicare-reported procedures in 2023: Established patient complete exam of visual system (HCPCS 92014); Photography of the retina (HCPCS 92250); New patient complete exam of visual system (HCPCS 92004). Source: CMS Medicare Physician & Other Practitioners file.