Geraldine Slean
NPI 1598185662 · Ophthalmology Physician · Union City, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Geraldine Slean is a Ophthalmology Physician provider in Union City, CA (NPI 1598185662).
Provider details
- NPI number
- 1598185662
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- A141033 (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
2,064 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 432 | $103 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 430 | $144 |
| Imaging of Optic Nerve92133 | 312 | $43 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 161 | $187 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 121 | $28 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 304 | 137 |
| Prednisolone Acetate | 182 | 123 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 142 | 59 |
| Erythromycin Basebrand: Erythromycin | 116 | 71 |
| Ofloxacin | 96 | 71 |
| Brimonidine Tartrate | 81 | 42 |
| Timolol Maleate | 39 | 18 |
| Dorzolamide Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$472 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
Registry dates
- Enumerated
- 2014-04-16
- Last updated
- 2022-10-22
- Certified
- 2022-10-22
Frequently asked questions
- What is Geraldine Slean's NPI number?
- Geraldine Slean's National Provider Identifier (NPI) is 1598185662, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Geraldine Slean's specialty?
- Geraldine Slean is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Geraldine Slean located?
- Geraldine Slean's practice location on file with NPPES is 3553 Whipple Rd Bldg B, Union City, CA 94587-1507.
- What is Geraldine Slean's phone number?
- The practice phone number listed in the NPPES registry for Geraldine Slean is (510) 675-2020.
- Does Geraldine Slean accept Medicare?
- Geraldine Slean is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Geraldine Slean's NPI active?
- Yes — Geraldine Slean's NPI (1598185662) is active in the NPPES registry as of the last update on 2022-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.