Katherine Chen, MS
NPI 1699237420 · Ophthalmology Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Chen, MS is a Ophthalmology Physician provider in Irvine, CA (NPI 1699237420).
Provider details
- NPI number
- 1699237420
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MS
- Sex
- Female
- Sole proprietor
- No
- License
- 125.076053 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
270 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 59 | $154 |
| Established Patient Problem Focused Exam of Visual System92012 | 34 | $113 |
| Photography of the Retina92250 | 34 | $47 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 34 | $198 |
| Imaging of Retina92134 | 28 | $48 |
| Transplantation of Outer Layer of Corneal Tissue65756 | 22 | $201 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 196 | 105 |
| Moxifloxacin Hclbrand: Moxifloxacin | 141 | 81 |
| Cyclosporinebrand: Restasis | 99 | 27 |
| Lifitegrastbrand: Xiidra | 72 | 21 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 70 | 26 |
| Cyclosporinebrand: Cequa | 55 | 14 |
| Cyclosporine | 46 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,512 across 12 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-04-01
- Last updated
- 2023-05-08
- Certified
- 2023-05-06
Frequently asked questions
- What is Katherine Chen's NPI number?
- Katherine Chen's National Provider Identifier (NPI) is 1699237420, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Chen's specialty?
- Katherine Chen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Chen located?
- Katherine Chen's practice location on file with NPPES is 850 Health Sciences Rd, Irvine, CA 92697-7242.
- What is Katherine Chen's phone number?
- The practice phone number listed in the NPPES registry for Katherine Chen is (949) 824-7105.
- Does Katherine Chen accept Medicare?
- Katherine Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Chen's NPI active?
- Yes — Katherine Chen's NPI (1699237420) is active in the NPPES registry as of the last update on 2023-05-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.