Greg Butterworth, O. D.
NPI 1336116979 · Optometrist · Havre De Grace, MD
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Greg Butterworth, O. D. is a Optometrist provider in Havre De Grace, MD (NPI 1336116979).
Provider details
- NPI number
- 1336116979
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O. D.
- Sex
- Male
- Sole proprietor
- No
- License
- TA1619 (MD)
Specialties & taxonomies
Eye and Vision Services Providers
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
1,282 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 | 467 | $94 |
| Exam of Visual Field With Extended Testing92083 | 116 | $66 |
| Microfluid Analysis of Tears83861 | 115 | $22 |
| Imaging of Optic Nerve92133 | 106 | $35 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 88 | $132 |
| Established Patient Problem Focused Exam of Visual System92012 | 87 | $92 |
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 | 116 | 35 |
| Timolol Maleate | 23 | — |
| Bimatoprostbrand: Lumigan | 23 | — |
| Brimonidine Tartrate | 20 | — |
| Azithromycin | 18 | 16 |
| Loteprednol Etabonate | 17 | — |
| Brinzolamide/Brimonidine Tartbrand: Simbrinza | 16 | — |
| Cyclosporine | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$584 across 20 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
- 2006-03-02
- Last updated
- 2021-11-02
- Certified
- 2021-11-02
Frequently asked questions
- What is Greg Butterworth's NPI number?
- Greg Butterworth's National Provider Identifier (NPI) is 1336116979, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Greg Butterworth's specialty?
- Greg Butterworth is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Greg Butterworth located?
- Greg Butterworth's practice location on file with NPPES is 920 Revolution St, Havre De Grace, MD 21078-3748.
- What is Greg Butterworth's phone number?
- The practice phone number listed in the NPPES registry for Greg Butterworth is (410) 939-2200.
- Does Greg Butterworth accept Medicare?
- Greg Butterworth is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Greg Butterworth's NPI active?
- Yes — Greg Butterworth's NPI (1336116979) is active in the NPPES registry as of the last update on 2021-11-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.