NPI registry status
Active
2026 NPPES data Optometrist NPI 1124289186 O.D.
Verify on CMS → Patrick Fleming, O.D.
Optometrist in Marengo, Iowa.
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
591
Medicare Part D claims · 151 beneficiaries · Optometrist avg: 279
Generic prescribing
68%
generic claims · 32% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Patrick Fleming, O.D. filed 591 Medicare Part D claims in 2024 as an Optometrist in Marengo, Iowa, prescribing 68% generic.
- 591
- Part D claims, 2024
- 68%
- generic prescribing
- ≥65th
- pct by Part D claim volume (lower-bound band)
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 Patrick Fleming, O.D.
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1124289186), first enumerated 06/23/2008.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 591 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- 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 1124289186 · Optometrist
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1124289186
- ENUM-MID 2008
- TAX-MEGA 61K Optometrist
- RX-LIGHT 591
- BOOK-LIGHT 667 in Iowa
- PHOTO-ENUM Heidi Dahlberg, OD · 2008
Patrick Fleming, O.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
591 ≥ 65th percentile 65% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. 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 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
What does the federal data show about Patrick Fleming, O.D.?
Quality data not reportedPrimary specialty
Optometrist
Medicare Part D claims
591 112% vs specialty avg
Specialty distribution in Iowa
How Optometrist compares to other specialties among Iowa providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Optometrist. Verify directly:
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 | 1124289186 |
|---|---|
| Specialty | Optometrist |
| Credentials | O.D. |
| Gender | Male |
| NPI Issued | 06/23/2008 |
Brand vs generic prescribing mix · Above average
Patrick Fleming, O.D. - brand share 32.0%
Optometrist average
32% brand-name claims vs 68% generic, on 591 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.
591
Total Claims
$34K
Total Drug Cost
151
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,247.167
- Total Day Supply
- 36,681
- Brand vs Generic
- 32% brand / 68% generic
- Brand Drug Cost
- $30K
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 75.2 years
- Avg HCC Risk Score
- 1.04
- Gender Split
- 54% female / 46% male
- Age Distribution
- <65: 11, 65-74: 63, 75-84: 51, 85+: 26
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Patrick Fleming, O.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Latanoprost
Latanoprost
247 claims
- Timolol Maleate 90
Timolol Maleate
90 claims
- Dorzolamide-Timolol 81
Dorzolamide-Timolol
81 claims
- Brimonidine Tartrate 53
Brimonidine Tartrate
53 claims
- Restasis 33
Restasis
33 claims
- Acyclovir 14
Acyclovir
14 claims
- Neomycin-Polymyxin… 12
Neomycin-Polymyxin-Dexameth
12 claims
- Erythromycin 11
Erythromycin
11 claims
| Drug | Claims |
|---|---|
| Latanoprost | 247 |
| Timolol Maleate | 90 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 81 |
| Brimonidine Tartrate | 53 |
| Restasis Cyclosporine | 33 |
| Acyclovir | 14 |
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 12 |
| Erythromycin Erythromycin Base | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Optometrist Overview
How Patrick Fleming, O.D. fits within the Optometrist landscape nationally.
61,426
Optometrist Providers in US
56
States with Optometrist
279
Avg Claims per Provider
Patrick Fleming, O.D.'s 591 claims are above the specialty average of 279.
Nationwide Optometrist peers with similar MIPS or enrollment year
Two federal-record peer sets for Fleming, both outside Iowa so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2008)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Optometrist Providers in Iowa
Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as Fleming.
One of 667 Optometrist providers enrolled in Iowa, 5 are shown here.
Dr. Ryan Ackerman
O.D.
Rock Rapids, IA
Dr. Katie Adams
OD
West Union, IA
Dr. Paul Ahern
O.D.
Dyersville, IA
Dr. George Alberhasky
O.D., P.C.
Iowa City, IA
Dr. Troy Albrecht
OD
Marion, IA
Compare Optometrist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Patrick Fleming, O.D.'s specialty? ▼
Patrick Fleming, O.D. specializes in Optometrist and practices in Marengo, Iowa. Credentials: O.D..
How much does Patrick Fleming, O.D. prescribe under Medicare Part D? ▼
In 2024, Patrick Fleming, O.D. wrote 591 Medicare Part D claims totaling $34K in drug costs for 151 beneficiaries.
Where is Patrick Fleming, O.D. located? ▼
Patrick Fleming, O.D. is located at 1022 COURT AVE, Marengo, IA, 52301. Phone: (319) 642-3311.
What is Patrick Fleming, O.D.'s NPI number? ▼
Patrick Fleming, O.D.'s National Provider Identifier (NPI) is 1124289186, issued on 06/23/2008.
Does Patrick Fleming, O.D. prescribe more brand-name or generic drugs? ▼
Patrick Fleming, O.D.'s prescribing is 32% brand-name and 68% generic drugs by claim count, with $30K 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 Patrick Fleming, O.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Patrick Fleming, O.D.'s most frequently prescribed drugs include Latanoprost, Timolol Maleate, Dorzolamide-Timolol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Patrick Fleming, O.D. accept Medicare? ▼
Patrick Fleming, O.D. appears in CMS Medicare data with 591 Part D claims and 151 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Patrick Fleming, O.D.'s credentials? ▼
Patrick Fleming, O.D.'s NPI is 1124289186 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 (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- 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.