2026 NPPES data Optometrist NPI 1336116979 O. D.
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Greg Butterworth, O. D.

Optometrist in Havre De Grace, Maryland.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 60,484 in Optometrist, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
182
Medicare Part D claims · 85 beneficiaries · Optometrist avg: 257
Generic prescribing
49%
generic claims · 51% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
86.1/100
▲ 3 pts above national avg 83.1 · Above neutral
Industry payments
$584.01
20 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Greg Butterworth, O. D. reported a CMS MIPS final score of 86.1/100 - above the 83.1 national average - and filed 182 Medicare Part D claims in 2023.

86.1/100
MIPS score · +3 vs avg
182
Part D claims, 2023
49%
generic prescribing
$584.01
industry payments (Sunshine Act)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.

Greg Butterworth, O. D.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure

86 Top 48% higher than 52% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). This entry sits in this band. 90+: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Greg Butterworth, O. D. sits

This provider among optometrist peers

Across the 6,527 optometrist providers who report both Medicare Part D prescribing and a MIPS quality score, Greg Butterworth, O. D. writes more Part D claims than 30% of them and scores higher on MIPS quality than 51% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Part D claim volume vs MIPS quality, by specialty percentile

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100024.949.974.899.8Part D claim volume, percentile in specialtyMIPS quality, percentilePart D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 48Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 57Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 80Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 12Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 83Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 53Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 72Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 17Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 58Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 95Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 90Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 68Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 15Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 33Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 95Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 37Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 50Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 82Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 63Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 7Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 35Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 75Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 95Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 10Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 65Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 73Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 8Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 32Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 38Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 62Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 42Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 55Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 60Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 40Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 13Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 43Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 70Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 87Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 5Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 95Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 78Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 45Greg Butterworth, O. D.-Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 51
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one optometrist peer from a representative sample of 60; the gold marker is Greg Butterworth, O. D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

What does the federal data show about Greg Butterworth, O. D.?

High performer (top quartile)

NPI registry status

Active

Issued 03/02/2006

NPI 1336116979

Primary specialty

Optometrist

High-volume

60,484 US NPIs in this specialty

Medicare Part D claims

182 29% vs specialty avg

2023 prescription claims

Specialty avg: 257

MIPS final score

86.1/100 3 pts vs avg

Above neutral band

vs 83.1 national avg

Specialty distribution in Maryland

How Optometrist compares to other specialties among Maryland providers

Maryland providers
Behavior Technician - 14.1%Behavior Technician14.1%Clinical Social Worker - 5.5%Clinical Social Worker5.5%Student in an Organized Health Care Education/Training Program - 4.5%Student in an Organized Health Care Education/Training Program4.5%Home Health Aide - 4.4%Home Health Aide4.4%Physical Therapist - 3.9%Physical Therapist3.9%Pharmacist - 3.6%Pharmacist3.6%Optometrist - 0.6%Optometrist0.6%
Largest specialties in Maryland (% of in-state providers)

Medicare quality performance, MIPS

Greg Butterworth, O. D.'s 2023 MIPS final score plotted against the Optometrist national average

High performer (top quartile)
MIPS Final Score
86.1/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Optometrist) - 86.1/100 vs national avg 83.1

0%100%National avg83%86.1%
MIPS final score (Optometrist) - 86.1/100 vs national avg 83.1
How MIPS and board certification work

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

Greg Butterworth, O. D. appears in the CMS NPPES registry as an Optometrist provider holding O. D. credentials at 920 REVOLUTION ST, Havre De Grace, MD, 21078, with a listed phone of (410) 939-2200. NPI 1336116979 was issued on 03/02/2006.

Medicare Part D records for calendar year 2023 show 182 prescription claims written by this provider, covering 85 Medicare beneficiaries and totaling roughly $47K in drug spend, split 51% brand-name and 49% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 86.1/100 for the 2023 performance year (Quality 82.9), compared with the national average of 83.1.

Optometrist is a high-volume specialty nationwide, with 60,484 enrolled providers across 56 states and an average of 257 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.

Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

920 REVOLUTION ST
Havre De Grace, MD 21078

Provider Details

NPI 1336116979
Specialty Optometrist
Credentials O. D.
Gender Male
NPI Issued 03/02/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

86.0925
Final Score
Avg: 83.1
82.8955
Quality
85
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where Greg Butterworth, O. D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

Katzen Medical Associates PC
Lutherville, MD

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) - CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Greg Butterworth, O. D.. Source: openpaymentsdata.cms.gov.

Total received

$584

Largest payer

Sight Sciences, Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Brand-heavy

Greg Butterworth, O. D. - brand share 51.0%
Optometrist average

51% brand-name claims vs 49% generic, on 182 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

182
Total Claims
$47K
Total Drug Cost
85
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
256
Total Day Supply
6,359
Brand vs Generic
51% brand / 49% generic
Brand Drug Cost
$42K
Generic Drug Cost
$5K

Patient Demographics

Average Patient Age
74.4 years
Avg HCC Risk Score
1.32
Gender Split
76% female / 24% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What Greg Butterworth, O. D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Latanoprost
21
Neomycin-Polymyxin-Dexameth
Neomycin/Polymyxin B/Dexametha
15
Loteprednol Etabonate
13
Prednisolone Acetate
12
Vyzulta
Latanoprostene Bunod
12
Brimonidine Tartrate
11
Xiidra
Lifitegrast
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Optometrist Overview

How Greg Butterworth, O. D. fits within the Optometrist landscape nationally.

60,484
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider

Greg Butterworth, O. D.'s 182 claims are below the specialty average of 257.

Nearby Optometrist Providers in Maryland

Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Butterworth.

Compare Optometrist nationally: see state-by-state distribution →

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Maryland medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Optometrist peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Greg Butterworth, O. D.'s specialty?
Greg Butterworth, O. D. specializes in Optometrist and practices in Havre De Grace, Maryland. Credentials: O. D..
How much does Greg Butterworth, O. D. prescribe under Medicare Part D?
In 2023, Greg Butterworth, O. D. wrote 182 Medicare Part D claims totaling $47K in drug costs for 85 beneficiaries.
What is Greg Butterworth, O. D.'s Medicare quality score?
Greg Butterworth, O. D. has a CMS MIPS Final Score of 86.1/100 (Quality: 82.9). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Greg Butterworth, O. D. located?
Greg Butterworth, O. D. is located at 920 REVOLUTION ST, Havre De Grace, MD, 21078. Phone: (410) 939-2200.
What is Greg Butterworth, O. D.'s NPI number?
Greg Butterworth, O. D.'s National Provider Identifier (NPI) is 1336116979, issued on 03/02/2006.
Does Greg Butterworth, O. D. prescribe more brand-name or generic drugs?
Greg Butterworth, O. D.'s prescribing is 51% brand-name and 49% generic drugs by claim count, with $42K in brand drug costs.
How many Optometrist providers are there in the US?
There are 60,484 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does Greg Butterworth, O. D. prescribe most often?
Based on 2023 Medicare Part D data, Greg Butterworth, O. D.'s most frequently prescribed drugs include Latanoprost, Neomycin-Polymyxin-Dexameth, Loteprednol Etabonate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Greg Butterworth, O. D. accept Medicare?
Greg Butterworth, O. D. appears in CMS Medicare data with 182 Part D claims and 85 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Greg Butterworth, O. D.'s credentials?
Greg Butterworth, O. D.'s NPI is 1336116979 with credentials O. D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

View source datasets and methodology notes
Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology

Compiled from official public sources by the PlainDoctor editorial team.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.