John Pyun, MD
NPI 1851822639 · Ophthalmology Physician · Pinole, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Pyun, MD is a Ophthalmology Physician provider in Pinole, CA (NPI 1851822639).
Provider details
- NPI number
- 1851822639
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
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
9 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,471 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 Complete Exam of Visual System92014 | 627 | $165 |
| Established Patient Problem Focused Exam of Visual System92012 | 542 | $118 |
| Photography of the Retina92250 | 385 | $49 |
| Imaging of Optic Nerve92133 | 226 | $48 |
| Exam of Visual Field With Extended Testing92083 | 201 | $86 |
| New Patient Complete Exam of Visual System92004 | 150 | $193 |
| Imaging of Retina92134 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 369 | 140 |
| Timolol Maleate | 149 | 67 |
| Cromolyn Sodium | 127 | 81 |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 72 | 54 |
| Brimonidine Tartrate | 63 | 32 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 62 | 28 |
| Erythromycin Basebrand: Erythromycin | 43 | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$65 across 3 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
Additional practice locations (2)
- 11234 Anderson StLoma Linda, CA 92354-2804Phone: (909) 558-2182
- 4077 Fifth Ave#mer35San Diego, CA 92103-2105Phone: (619) 294-8111
Registry dates
- Enumerated
- 2017-03-23
- Last updated
- 2021-08-13
- Certified
- 2021-08-13
Frequently asked questions
- What is John Pyun's NPI number?
- John Pyun's National Provider Identifier (NPI) is 1851822639, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Pyun's specialty?
- John Pyun is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is John Pyun located?
- John Pyun's practice location on file with NPPES is 1289 Pinole Valley Rd, Pinole, CA 94564-1348.
- What is John Pyun's phone number?
- The practice phone number listed in the NPPES registry for John Pyun is (510) 724-1768.
- Does John Pyun accept Medicare?
- John Pyun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Pyun's NPI active?
- Yes — John Pyun's NPI (1851822639) is active in the NPPES registry as of the last update on 2021-08-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.