2026 NPPES data Optometrist NPI 1124190343 O.D.
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RICKY GREENFIELD, O.D.

Optometrist in KEOKUK, Iowa. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
351
Medicare Part D claims · 132 beneficiaries · Optometrist avg: 257
Generic prescribing
70%
generic claims · 30% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
50/100
▼ 33 pts below national avg 83.1 · [object Object]

What the federal data shows

RICKY GREENFIELD, O.D. reported a CMS MIPS final score of 50/100 — below the 83.1 national average — and filed 351 Medicare Part D claims in 2023.

50/100
MIPS score · -33 vs avg
351
Part D claims, 2023
70%
generic prescribing

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.

RICKY GREENFIELD, 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

50 4th percentile higher than 4% 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%). This entry sits in this band. 60–70: 13,906 scored providers (3%). Above this entry. 70–80: 118,074 scored providers (25%). Above this entry. 80–90: 129,887 scored providers (27%). Above this entry. 90–100: 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

What does the federal data show about RICKY GREENFIELD, O.D.?

Below national average

NPI registry status

Active

Issued 11/14/2006

NPI 1124190343

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

351 37% vs specialty avg

2023 prescription claims

Specialty avg: 257

MIPS final score

50/100 33.099999999999994% pts

Mid-tier band

vs 83.1 national avg

Specialty distribution in Iowa

How Optometrist compares to other specialties among Iowa providers

Iowa providers

Optometrist share within Iowa

1. Optometrist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Optometrist share within Iowa

Medicare quality performance — MIPS

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

Below national average
MIPS Final Score
50/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Optometrist) — 50/100 vs national avg 83.1

0%100%National avg83%50%
MIPS final score (Optometrist) — 50/100 vs national avg 83.1

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).

RICKY GREENFIELD, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 3341 MAIN ST, KEOKUK, IA, 52632, with a listed phone of (319) 524-3892. NPI 1124190343 was issued on 11/14/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GREENFIELD most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 351 prescription claims written by this provider, covering 132 Medicare beneficiaries and totaling roughly $16K in drug spend, split 30% brand-name and 70% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 50/100 for the 2023 performance year (Quality 0), compared with the national average of 83.1.

Optometrist is a high-volume specialty nationwide, with 60,463 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

3341 MAIN ST
KEOKUK, IA 52632

Provider Details

NPI 1124190343
Specialty Optometrist
Credentials O.D.
Gender Male
NPI Issued 11/14/2006

CMS Quality Score (MIPS)

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

50
Final Score
Avg: 83.1
0
Quality

Reporting: Individual

Brand vs generic prescribing mix · Above average

RICKY GREENFIELD, O.D. — brand share 30.0%
Specialty average (est.)

30% brand-name claims vs 70% generic, on 351 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.

351
Total Claims
$16K
Total Drug Cost
132
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
431
Total Day Supply
9,956
Brand vs Generic
30% brand / 70% generic
Brand Drug Cost
$10K
Generic Drug Cost
$5K

Patient Demographics

Average Patient Age
75.6 years
Avg HCC Risk Score
0.95
Gender Split
62% female / 38% male

Top Prescribed Drugs (Medicare Part D)

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

What RICKY GREENFIELD, 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
136
Neomycin-Polymyxin-Dexameth
Neomycin/Polymyxin B/Dexametha
66
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
23
Timolol Maleate
19
Brimonidine Tartrate
18
Prednisolone Acetate
17

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

Optometrist Overview

How RICKY GREENFIELD, O.D. fits within the Optometrist landscape nationally.

60,463
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider

RICKY GREENFIELD, O.D.'s 351 claims are above the specialty average of 257.

Nearby Optometrist Providers in Iowa

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

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

Frequently Asked Questions

What is RICKY GREENFIELD, O.D.'s specialty?
RICKY GREENFIELD, O.D. specializes in Optometrist and practices in KEOKUK, Iowa. Credentials: O.D..
How much does RICKY GREENFIELD, O.D. prescribe under Medicare Part D?
In 2023, RICKY GREENFIELD, O.D. wrote 351 Medicare Part D claims totaling $16K in drug costs for 132 beneficiaries.
What is RICKY GREENFIELD, O.D.'s Medicare quality score?
RICKY GREENFIELD, O.D. has a CMS MIPS Final Score of 50/100 (Quality: 0). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is RICKY GREENFIELD, O.D. located?
RICKY GREENFIELD, O.D. is located at 3341 MAIN ST, KEOKUK, IA, 52632. Phone: (319) 524-3892.
What is RICKY GREENFIELD, O.D.'s NPI number?
RICKY GREENFIELD, O.D.'s National Provider Identifier (NPI) is 1124190343, issued on 11/14/2006.
Does RICKY GREENFIELD, O.D. prescribe more brand-name or generic drugs?
RICKY GREENFIELD, O.D.'s prescribing is 30% brand-name and 70% generic drugs by claim count, with $10K in brand drug costs.
How many Optometrist providers are there in the US?
There are 60,463 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does RICKY GREENFIELD, O.D. prescribe most often?
Based on 2023 Medicare Part D data, RICKY GREENFIELD, O.D.'s most frequently prescribed drugs include Latanoprost, Neomycin-Polymyxin-Dexameth, Dorzolamide-Timolol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RICKY GREENFIELD, O.D. accept Medicare?
RICKY GREENFIELD, O.D. appears in CMS Medicare data with 351 Part D claims and 132 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RICKY GREENFIELD, O.D.'s credentials?
RICKY GREENFIELD, O.D.'s NPI is 1124190343 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

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