Keying Yan, OD
NPI 1447924329 · Optometrist · Hershey, PA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Keying Yan, OD is a Optometrist provider in Hershey, PA (NPI 1447924329).
Provider details
- NPI number
- 1447924329
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Female
- Sole proprietor
- Yes
- License
- OEG003885 (PA)
Specialties & taxonomies
Eye and Vision Services Providers
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
4 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
553 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 154 | $86 |
| Imaging of Retina92134 | 85 | $37 |
| New Patient Complete Exam of Visual System92004 | 69 | $139 |
| Established Patient Complete Exam of Visual System92014 | 69 | $118 |
| Imaging of Optic Nerve92133 | 54 | $34 |
| Exam of Visual Field With Extended Testing92083 | 38 | $59 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 85 | 21 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 34 | — |
| Cyclosporine | 26 | — |
| Timolol Maleate | 20 | — |
| Brimonidine Tartrate | 19 | — |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 12 | — |
| Lifitegrastbrand: Xiidra | 11 | — |
Practice location
Mailing address
Additional practice locations (1)
- 1705 Warren Ave Ste 303Williamsport, PA 17701-2665Phone: (570) 320-7850
Registry dates
- Enumerated
- 2021-08-04
- Last updated
- 2026-04-27
- Certified
- 2026-04-27
Frequently asked questions
- What is Keying Yan's NPI number?
- Keying Yan's National Provider Identifier (NPI) is 1447924329, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Keying Yan's specialty?
- Keying Yan is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Keying Yan located?
- Keying Yan's practice location on file with NPPES is 500 University Dr, Hershey, PA 17033-2360.
- What is Keying Yan's phone number?
- The practice phone number listed in the NPPES registry for Keying Yan is (717) 531-5690.
- Does Keying Yan accept Medicare?
- Keying Yan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Keying Yan's NPI active?
- Yes — Keying Yan's NPI (1447924329) is active in the NPPES registry as of the last update on 2026-04-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.