Doctor profile · Federal record
Dr. Mary Kathryn Zak, O.D.
Optometrist (CMS: Optometry) · Martinsville, VA
- NPI 1821543836
- Accepts Medicare
- 10 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1975 Virginia Ave
Martinsville, VA 241128388
(276) 647-3937 - Mailing address
-
249 Robinwood Pl
Danville, VA 245406301
Credentials & registration
- NPI registered
- August 2016 — 10 yrs on file
- Year of graduation
- 2016 — 10 yrs since
- Specialty taxonomy
- 152W00000X — NUCC code
- State license (1)
- Virginia #0618002526
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1821543836. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
9,280
Distinct HCPCS
10
Medicare allowed
$109,179
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
66984 |
Removal of cataract with insertion of prosthetic lens | 8,189 | 56 | $1 | |
92014 |
Established patient complete exam of visual system | 313 | 307 | $124 | |
92250 |
Photography of the retina | 283 | 280 | $36 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 120 | 86 | $89 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 113 | 93 | $125 | |
92004 |
New patient complete exam of visual system | 100 | 100 | $148 | |
92083 |
Exam of visual field with extended testing | 65 | 63 | $62 | |
92133 |
Imaging of optic nerve | 44 | 43 | $34 | |
92134 |
Imaging of retina | 27 | 26 | $39 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 26 | 26 | $163 |
In context: peer comparison
Among 4 peers in this city , average services per provider: 464. This provider delivers 20× the peer median.Open Payments
Industry payments received
All-time total
$91
Transactions
2
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Alcon Vision LLC | 2 | $90.73 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
596
Patients
232
Total drug cost
$32,940
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Latanoprost | Generic | 282 | 81 | $4,957 |
| Neomycin-Polymyxin-Dexameth (Neomycin/Polymyxin B/Dexametha) | Brand | 99 | 78 | $1,373 |
| Tobramycin-Dexamethasone (Tobramycin/Dexamethasone) | Brand | 57 | 33 | $4,624 |
| Timolol Maleate | Generic | 56 | 15 | $581 |
| Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) | Brand | 36 | 11 | $1,188 |
| Prednisolone Acetate | Generic | 16 | 14 | $800 |
| Brimonidine Tartrate | Generic | 13 | 0 | $210 |
| Combigan (Brimonidine Tartrate/Timolol) | Brand | 13 | 0 | $2,869 |
| Lumigan (Bimatoprost) | Brand | 12 | 0 | $5,195 |
| Restasis (Cyclosporine) | Brand | 12 | 0 | $11,143 |
Frequently asked questions
What is Dr. Mary Kathryn Zak's medical specialty?
Dr. Mary Kathryn Zak practices Optometrist in Martinsville, VA.
Where does Dr. Mary Kathryn Zak practice?
Dr. Mary Kathryn Zak practices at 1975 Virginia Ave, Martinsville, VA 241128388. Office phone: 2766473937.
What is Dr. Mary Kathryn Zak's NPI?
Dr. Mary Kathryn Zak's National Provider Identifier (NPI) is 1821543836, issued by NPPES.
Does Dr. Mary Kathryn Zak accept Medicare assignment?
Yes. Dr. Mary Kathryn Zak accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mary Kathryn Zak commonly perform?
Top Medicare-reported procedures in 2023: Removal of cataract with insertion of prosthetic lens (HCPCS 66984); Established patient complete exam of visual system (HCPCS 92014); Photography of the retina (HCPCS 92250). Source: CMS Medicare Physician & Other Practitioners file.