Gregory Christensen, MD
NPI 1851374482 · Ophthalmology Physician · Greenville, SC
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Christensen, MD is a Ophthalmology Physician provider in Greenville, SC (NPI 1851374482).
Provider details
- NPI number
- 1851374482
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 17217 (SC)
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
20 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
4,154 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) |
|---|---|---|
| Imaging of Retina92134 | 1,692 | $37 |
| Injection of Drug Into Eye67028 | 839 | $111 |
| Established Patient Problem Focused Exam of Visual System92012 | 686 | $82 |
| Established Patient Complete Exam of Visual System92014 | 654 | $116 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 147 | $84 |
| New Patient Complete Exam of Visual System92004 | 48 | $138 |
| Photography of the Retina |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 164 | 68 |
| Ketorolac Tromethamine | 140 | 67 |
| Timolol Maleate | 90 | 30 |
| Latanoprost | 85 | 28 |
| Brimonidine Tartrate | 30 | 14 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 29 | 16 |
| Dorzolamide Hcl | 23 | — |
| Bromfenac Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$51 across 2 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
- 2005-11-29
- Last updated
- 2007-10-29
Frequently asked questions
- What is Gregory Christensen's NPI number?
- Gregory Christensen's National Provider Identifier (NPI) is 1851374482, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Christensen's specialty?
- Gregory Christensen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Christensen located?
- Gregory Christensen's practice location on file with NPPES is 1126 Grove Rd, Greenville, SC 29605-4620.
- What is Gregory Christensen's phone number?
- The practice phone number listed in the NPPES registry for Gregory Christensen is (864) 233-5722.
- Does Gregory Christensen accept Medicare?
- Gregory Christensen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Christensen's NPI active?
- Yes — Gregory Christensen's NPI (1851374482) is active in the NPPES registry as of the last update on 2007-10-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.