Gregory Butler, M.D.
NPI 1376726091 · Ophthalmology Physician · Washington, DC
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Butler, M.D. is a Ophthalmology Physician provider in Washington, DC (NPI 1376726091).
Provider details
- NPI number
- 1376726091
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD30132 (DC)
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
18 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
3,432 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 | 660 | $145 |
| Exam of the Internal Drainage System of Eye92020 | 606 | $31 |
| Exam of Visual Field With Extended Testing92083 | 588 | $73 |
| Photography of the Retina92250 | 470 | $41 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 338 | $201 |
| Imaging of Optic Nerve92133 | 268 | $38 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 1,766 | 610 |
| Brimonidine Tartrate | 443 | 152 |
| Azelastine Hcl | 433 | 170 |
| Brinzolamide/Brimonidine Tartbrand: Simbrinza | 300 | 104 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 167 | 59 |
| Ketorolac Tromethamine | 153 | 70 |
| Netarsudil Mesylat/Latanoprostbrand: Rocklatan | 133 | 55 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$204 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
- 2007-12-17
- Last updated
- 2007-12-17
Frequently asked questions
- What is Gregory Butler's NPI number?
- Gregory Butler's National Provider Identifier (NPI) is 1376726091, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Butler's specialty?
- Gregory Butler is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Butler located?
- Gregory Butler's practice location on file with NPPES is 1647 Benning Rd Ne, Washington, DC 20002-4569.
- What is Gregory Butler's phone number?
- The practice phone number listed in the NPPES registry for Gregory Butler is (202) 397-2800.
- Does Gregory Butler accept Medicare?
- Gregory Butler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Butler's NPI active?
- Yes — Gregory Butler's NPI (1376726091) is active in the NPPES registry as of the last update on 2007-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.