WAI YIN TERESA CHANG – Optometrist, NPI 1104478445
Optometrist
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
625 OPTOMETRY in MD
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Provider Addresses for WAI YIN TERESA CHANG
5957 WHELAN LANE
FREDERICK, MD 21703
Phone:
Type: Mailing
8614 WESTWOOD CENTER DR FL 9
VIENNA, VA 221822442
Phone: (703) 847-8899
Fax: (571) 223-6780
Type: Mailing
1725, Dual Highway, Edgewood Hill, Hagerstown, Washington County, Maryland, 21740, United States
HAGERSTOWN, MD 217406653
Phone: (301) 739-6573
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 11 Open Payments records for all available years, with a total value of $501.
Total Amount is formed as General ($501) + Research ($0) + Ownership ($0) = $501.
Last reported payment date: 2024-09-26 • Largest payer in this snapshot: CooperVision Inc. ($235).
Total Amount
$501
General + Research + Ownership
Payments
11
Total payment records
General Amount
$501
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-09-26
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| CooperVision Inc. | $235 |
| Alcon Vision LLC | $113 |
| Oyster Point Pharma, Inc. | $88 |
| LKC Technologies, Inc. | $45 |
| Bausch & Lomb Americas Inc. | $20 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2019-10-14
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20191014000206 | I | Optometry | MD | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 38 | 37 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 16 | 16 | $0 |
| 92014 | Established patient complete exam of visual system | 13 | 13 | $0 |
Insurance plans in this area (ZIP 21703)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| O P T O M E T R Y | VA | |
| O P T O M E T R Y | VA | |
| O P T O M E T R Y | VA | |
| O P T O M E T R Y | VA | |
| - | VA | |
| O P T O M E T R Y | VA | |
| O P T O M E T R Y | VA | |
| O P T O M E T R Y | VA | |
| O P T O M E T R Y | MD | |
| O P T O M E T R Y | MD |
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