Preema Buch, MD
NPI 1366852865 · Ophthalmology Physician · Castro Valley, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Preema Buch, MD is a Ophthalmology Physician provider in Castro Valley, CA (NPI 1366852865).
Provider details
- NPI number
- 1366852865
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A168154 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 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
1,156 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 Problem Focused Exam of Visual System92012 | 314 | $119 |
| Established Patient Complete Exam of Visual System92014 | 290 | $167 |
| Exam of Visual Field With Extended Testing92083 | 129 | $87 |
| Imaging of Optic Nerve92133 | 106 | $45 |
| Photography of the Retina92250 | 94 | $50 |
| New Patient Complete Exam of Visual System92004 | 63 | $195 |
| Ultrasound Scan of Cornea to Determine Thickness |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 234 | 75 |
| Timolol Maleate | 86 | 20 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 69 | 14 |
| Brimonidine Tartrate | 61 | 17 |
| Brinzolamide/Brimonidine Tartbrand: Simbrinza | 59 | 14 |
| Erythromycin Basebrand: Erythromycin | 39 | 23 |
| Prednisolone Acetate | 34 | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$211 across 9 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
- 2014-05-06
- Last updated
- 2025-11-21
- Certified
- 2025-11-21
Frequently asked questions
- What is Preema Buch's NPI number?
- Preema Buch's National Provider Identifier (NPI) is 1366852865, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Preema Buch's specialty?
- Preema Buch is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Preema Buch located?
- Preema Buch's practice location on file with NPPES is 20046 Lake Chabot Rd, Castro Valley, CA 94546-5304.
- What is Preema Buch's phone number?
- The practice phone number listed in the NPPES registry for Preema Buch is (510) 881-8823.
- Does Preema Buch accept Medicare?
- Preema Buch is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Preema Buch's NPI active?
- Yes — Preema Buch's NPI (1366852865) is active in the NPPES registry as of the last update on 2025-11-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.