2026 NPPES data Optometrist NPI 1598736928 OD
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BENJAMIN WILLIAMS, OD

Optometrist in WASHINGTON, 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
727
Medicare Part D claims · 171 beneficiaries · Optometrist avg: 257
Generic prescribing
85%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
12.5/100
▼ 71 pts below national avg 83.1 · [object Object]
Industry payments
$128.69
7 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

BENJAMIN WILLIAMS, OD reported a CMS MIPS final score of 12.5/100 — below the 83.1 national average — and filed 727 Medicare Part D claims in 2023.

12.5/100
MIPS score · -71 vs avg
727
Part D claims, 2023
85%
generic prescribing
$128.69
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.

BENJAMIN WILLIAMS, OD's MIPS score vs every scored U.S. clinician

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

13 2nd percentile higher than 2% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). This entry sits in this band. 20–30: 3,069 scored providers (1%). Above this entry. 30–40: 2,746 scored providers (1%). Above this entry. 40–50: 2,928 scored providers (1%). Above this entry. 50–60: 5,882 scored providers (1%). Above this entry. 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 BENJAMIN WILLIAMS, OD?

Below national average

NPI registry status

Active

Issued 02/01/2006

NPI 1598736928

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

727 183% vs specialty avg

2023 prescription claims

Specialty avg: 257

MIPS final score

12.5/100 70.6% pts

Penalty band 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

BENJAMIN WILLIAMS, OD's 2023 MIPS final score plotted against the Optometrist national average

Below national average
MIPS Final Score
12.5/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Optometrist) — 12.5/100 vs national avg 83.1

0%100%National avg83%12.5%
MIPS final score (Optometrist) — 12.5/100 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).

BENJAMIN WILLIAMS, OD appears in the CMS NPPES registry as a Optometrist provider holding OD credentials at 301 S IOWA AVE, WASHINGTON, IA, 52353, with a listed phone of (319) 653-2371. NPI 1598736928 was issued on 02/01/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WILLIAMS 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 727 prescription claims written by this provider, covering 171 Medicare beneficiaries and totaling roughly $40K in drug spend, split 15% brand-name and 85% 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 12.5/100 for the 2023 performance year (Quality 25), 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

301 S IOWA AVE
WASHINGTON, IA 52353

Provider Details

NPI 1598736928
Specialty Optometrist
Credentials OD
Gender Male
NPI Issued 02/01/2006

CMS Quality Score (MIPS)

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

12.5
Final Score
Avg: 83.1
25
Quality

Reporting: Individual

Hospital and facility affiliations

Facilities where BENJAMIN WILLIAMS, OD 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.

THOMAS D LOWE, OD PC
WASHINGTON, IA

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 BENJAMIN WILLIAMS, OD. Source: openpaymentsdata.cms.gov.

Total received

$129

Largest payer

Alcon Vision LLC

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 · Typical

BENJAMIN WILLIAMS, OD — brand share 15.0%
Specialty average (est.)

15% brand-name claims vs 85% generic, on 727 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.

727
Total Claims
$40K
Total Drug Cost
171
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,164
Total Day Supply
32,471
Brand vs Generic
15% brand / 85% generic
Brand Drug Cost
$27K
Generic Drug Cost
$13K
Antibiotic Claims
11

Patient Demographics

Average Patient Age
77.5 years
Avg HCC Risk Score
0.85
Gender Split
68% female / 32% male

Top Prescribed Drugs (Medicare Part D)

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

What BENJAMIN WILLIAMS, OD 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
350
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
120
Brimonidine Tartrate
40
Timolol Maleate
38
Lumigan
Bimatoprost
32
Prednisolone Acetate
22
Tobramycin-Dexamethasone
Tobramycin/Dexamethasone
20
Erythromycin
Erythromycin Base
19
Neomycin-Polymyxin-Dexameth
Neomycin/Polymyxin B/Dexametha
18

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

Optometrist Overview

How BENJAMIN WILLIAMS, OD fits within the Optometrist landscape nationally.

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

BENJAMIN WILLIAMS, OD's 727 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 WILLIAMS.

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

Frequently Asked Questions

What is BENJAMIN WILLIAMS, OD's specialty?
BENJAMIN WILLIAMS, OD specializes in Optometrist and practices in WASHINGTON, Iowa. Credentials: OD.
How much does BENJAMIN WILLIAMS, OD prescribe under Medicare Part D?
In 2023, BENJAMIN WILLIAMS, OD wrote 727 Medicare Part D claims totaling $40K in drug costs for 171 beneficiaries.
What is BENJAMIN WILLIAMS, OD's Medicare quality score?
BENJAMIN WILLIAMS, OD has a CMS MIPS Final Score of 12.5/100 (Quality: 25). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is BENJAMIN WILLIAMS, OD located?
BENJAMIN WILLIAMS, OD is located at 301 S IOWA AVE, WASHINGTON, IA, 52353. Phone: (319) 653-2371.
What is BENJAMIN WILLIAMS, OD's NPI number?
BENJAMIN WILLIAMS, OD's National Provider Identifier (NPI) is 1598736928, issued on 02/01/2006.
Does BENJAMIN WILLIAMS, OD prescribe more brand-name or generic drugs?
BENJAMIN WILLIAMS, OD's prescribing is 15% brand-name and 85% generic drugs by claim count, with $27K 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 BENJAMIN WILLIAMS, OD prescribe most often?
Based on 2023 Medicare Part D data, BENJAMIN WILLIAMS, OD's most frequently prescribed drugs include Latanoprost, Dorzolamide-Timolol, Brimonidine Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does BENJAMIN WILLIAMS, OD accept Medicare?
BENJAMIN WILLIAMS, OD appears in CMS Medicare data with 727 Part D claims and 171 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify BENJAMIN WILLIAMS, OD's credentials?
BENJAMIN WILLIAMS, OD's NPI is 1598736928 with credentials OD. 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