NPI registry status
Active
2026 NPPES data Optometrist NPI 1609868124 OD
Verify on CMS → John Warren, OD
Optometrist in Mt Pleasant, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 61,426 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
244
Medicare Part D claims · 73 beneficiaries · Optometrist avg: 279
Generic prescribing
69%
generic claims · 31% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
78.9/100
▼ 5 pts below national avg 83.5 · Above neutral
Industry payments
$686.78
3 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
John Warren, OD reported a CMS MIPS final score of 78.9/100 - below the 83.5 national average - and filed 244 Medicare Part D claims in 2024.
- 78.9/100
- MIPS score · -5 vs avg
- 244
- Part D claims, 2024
- 69%
- generic prescribing
- $686.78
- 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.
Federal trust snapshot
What official records show about John Warren, OD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1609868124), first enumerated 08/19/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 244 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 78.9/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Industry payment transparency
$686.78 in reported industry payments (3 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1609868124 · Optometrist
NPI-10 · ENUM-LEGACY · TAX-MEGA · MIPS-BELOW · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1609868124
- ENUM-LEGACY 2005
- TAX-MEGA 61K Optometrist
- MIPS-BELOW 78.9/100
- RX-LIGHT 244
- BOOK-LIGHT 1,142 in Wisconsin
- PHOTO-FINISH Christopher Kelly, O… · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Nina Li, OD · lo…
Nina Li, OD
78.8 MIPS pts
- Warren · this pr…
Warren · this provider
78.9 MIPS pts
- Michael Zolman, …
Michael Zolman, O.D.
78.9 MIPS pts
- Christopher Kell…
Christopher Kelly, O.D.
78.9 MIPS pts
- Julie McLaughlin…
Julie McLaughlin, O.D.
78.9 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
John Warren, OD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
79 ≥ 23rd percentile 23% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where John Warren, OD sits
This provider among optometrist peers
Across the 6,187 optometrist providers who report both Medicare Part D prescribing and a MIPS quality score, John Warren, OD writes more Part D claims than 38% of them and scores higher on MIPS quality than 31% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one optometrist peer from a representative sample of 60; the gold marker is John Warren, OD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about John Warren, OD?
Near national averagePrimary specialty
Optometrist
Medicare Part D claims
244 13% vs specialty avg
MIPS final score
78.9/100 4.6 pts vs avg
Specialty distribution in Wisconsin
How Optometrist compares to other specialties among Wisconsin providers
Medicare quality performance, MIPS
John Warren, OD's 2023 MIPS final score plotted against the Optometrist national average
- MIPS Final Score
- 78.9/100
- vs 83.5 national avg · 2023 performance year
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).
Practice Address
Provider Details
| NPI | 1609868124 |
|---|---|
| Specialty | Optometrist |
| Credentials | OD |
| Gender | Male |
| NPI Issued | 08/19/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
78.8718
Final Score
Measured-score avg: 83.5
57.7437
Quality
Reporting: Individual
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 John Warren, OD. Source: openpaymentsdata.cms.gov.
Total received
$687
Largest payer
Visionix USA, 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 · Above average
John Warren, OD - brand share 31.0%
Optometrist average
31% brand-name claims vs 69% generic, on 244 2024 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 2024.
244
Total Claims
$16K
Total Drug Cost
73
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 484.267
- Total Day Supply
- 13,730
- Brand vs Generic
- 31% brand / 69% generic
- Brand Drug Cost
- $9K
- Generic Drug Cost
- $7K
- Antibiotic Claims
- 12
Patient Demographics
- Average Patient Age
- 75.6 years
- Avg HCC Risk Score
- 1.30
- Gender Split
- 60% female / 40% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What John Warren, OD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Latanoprost
Latanoprost
146 claims
- Timolol Maleate 38
Timolol Maleate
38 claims
- Neomycin-Polymyxin… 14
Neomycin-Polymyxin-Dexameth
14 claims
| Drug | Claims |
|---|---|
| Latanoprost | 146 |
| Timolol Maleate | 38 |
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Optometrist Overview
How John Warren, OD fits within the Optometrist landscape nationally.
61,426
Optometrist Providers in US
56
States with Optometrist
279
Avg Claims per Provider
John Warren, OD's 244 claims are below the specialty average of 279.
Nationwide Optometrist peers with similar MIPS or enrollment year
Two federal-record peer sets for Warren, both outside Wisconsin so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (78.9 here).
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Optometrist Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Warren.
One of 1,142 Optometrist providers enrolled in Wisconsin, 5 are shown here.
Dr. Katie Abata
O.D.
Appleton, WI
Dr. Brianna Adams
OD
Stoughton, WI
Dr. Gerald Adams
OD
Westby, WI
James Adams
Portage, WI
Dr. Lawrence Addison
O.D.
Weston, WI
Compare Optometrist nationally: see state-by-state distribution →
Frequently Asked Questions
What is John Warren, OD's specialty? ▼
John Warren, OD specializes in Optometrist and practices in Mt Pleasant, Wisconsin. Credentials: OD.
How much does John Warren, OD prescribe under Medicare Part D? ▼
In 2024, John Warren, OD wrote 244 Medicare Part D claims totaling $16K in drug costs for 73 beneficiaries.
What is John Warren, OD's Medicare quality score? ▼
John Warren, OD has a CMS MIPS Final Score of 78.9/100 (Quality: 57.7). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is John Warren, OD located? ▼
John Warren, OD is located at 1139 S SUNNYSLOPE DR STE 203, Mt Pleasant, WI, 53406. Phone: (262) 752-2020.
What is John Warren, OD's NPI number? ▼
John Warren, OD's National Provider Identifier (NPI) is 1609868124, issued on 08/19/2005.
Does John Warren, OD prescribe more brand-name or generic drugs? ▼
John Warren, OD's prescribing is 31% brand-name and 69% generic drugs by claim count, with $9K in brand drug costs.
How many Optometrist providers are there in the US? ▼
There are 61,426 Optometrist providers across 56 states in the US. The average Optometrist provider writes 279 Medicare Part D claims per year.
What drugs does John Warren, OD prescribe most often? ▼
Based on 2024 Medicare Part D data, John Warren, OD's most frequently prescribed drugs include Latanoprost, Timolol Maleate, Neomycin-Polymyxin-Dexameth. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Warren, OD accept Medicare? ▼
John Warren, OD appears in CMS Medicare data with 244 Part D claims and 73 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Warren, OD's credentials? ▼
John Warren, OD's NPI is 1609868124 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
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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.