NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1275957623 M.D.
Verify on CMS → Benjamin Janson, M.D.
Ophthalmology Physician in Iowa City, 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 22,388 in Ophthalmology Physician, 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
714
Medicare Part D claims · 182 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
83%
generic claims · 17% 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
Benjamin Janson, M.D. filed 714 Medicare Part D claims in 2024 as an Ophthalmology Physician in Iowa City, Iowa, prescribing 83% generic.
- 714
- Part D claims, 2024
- 83%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥70th
- 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 Benjamin Janson, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1275957623), first enumerated 02/05/2014.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 714 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- 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 1275957623 · Ophthalmology Physician
NPI-10 · ENUM-MID · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1275957623
- ENUM-MID 2014
- TAX-MID 22K Ophthalmology Physician
- RX-LIGHT 714
- BOOK-THIN 205 in Iowa
- PHOTO-ENUM Alec Amram, M.D. · 2014
Benjamin Janson, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
714 ≥ 70th percentile 70% 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
✓
Board certification likely (heuristic, not verified)
Benjamin Janson, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Benjamin Janson, M.D.?
Quality data not reportedPrimary specialty
Ophthalmology Physician
Medicare Part D claims
714 52% vs specialty avg
Specialty distribution in Iowa
How Ophthalmology Physician 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 Ophthalmology Physician. 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 | 1275957623 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 02/05/2014 |
Hospital and facility affiliations
Facilities where Benjamin Janson, M.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.
Fuerste Eye Clinic
Dubuque, 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).
Brand vs generic prescribing mix · Typical
Benjamin Janson, M.D. - brand share 17.0%
Ophthalmology Physician average
17% brand-name claims vs 83% generic, on 714 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.
714
Total Claims
$30K
Total Drug Cost
182
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 987.4
- Total Day Supply
- 27,294
- Brand vs Generic
- 17% brand / 83% generic
- Brand Drug Cost
- $20K
- Generic Drug Cost
- $10K
Patient Demographics
- Average Patient Age
- 76.6 years
- Avg HCC Risk Score
- 1.26
- Gender Split
- 54% female / 46% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Benjamin Janson, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Latanoprost
Latanoprost
296 claims
- Ketorolac Trometha… 73
Ketorolac Tromethamine
73 claims
- Timolol Maleate 71
Timolol Maleate
71 claims
- Dorzolamide-Timolol 70
Dorzolamide-Timolol
70 claims
- Prednisolone Acetate 51
Prednisolone Acetate
51 claims
- Dorzolamide Hcl 21
Dorzolamide Hcl
21 claims
- Brimonidine Tartrate 17
Brimonidine Tartrate
17 claims
- Brimonidine Tartra… 17
Brimonidine Tartrate-Timolol
17 claims
| Drug | Claims |
|---|---|
| Latanoprost | 296 |
| Ketorolac Tromethamine | 73 |
| Timolol Maleate | 71 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 70 |
| Prednisolone Acetate | 51 |
| Dorzolamide Hcl | 21 |
| Brimonidine Tartrate | 17 |
| Brimonidine Tartrate-Timolol Brimonidine Tartrate/Timolol | 17 |
| Erythromycin Erythromycin Base | 17 |
| Acyclovir | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Benjamin Janson, M.D. fits within the Ophthalmology Physician landscape nationally.
22,388
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,490
Avg Claims per Provider
Benjamin Janson, M.D.'s 714 claims are below the specialty average of 1,490.
Nationwide Ophthalmology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Janson, both outside Iowa so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2014)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Ophthalmology Physician Providers in Iowa
Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as Janson.
One of 205 Ophthalmology Physician providers enrolled in Iowa, 5 are shown here.
Noor-Us-Sabah Ahmad
MBBS
Iowa City, IA
Dr. Kyle Alliman
M.D.
West Des Moines, IA
Adel Alsuhaibani
M.B., B.S.
Iowa City, IA
Dr. Wallace Alward
MD
Iowa City, IA
Dr. Beth Amspaugh
MD
West Des Moines, IA
Compare Ophthalmology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Benjamin Janson, M.D.'s specialty? ▼
Benjamin Janson, M.D. specializes in Ophthalmology Physician and practices in Iowa City, Iowa. Credentials: M.D..
How much does Benjamin Janson, M.D. prescribe under Medicare Part D? ▼
In 2024, Benjamin Janson, M.D. wrote 714 Medicare Part D claims totaling $30K in drug costs for 182 beneficiaries.
Where is Benjamin Janson, M.D. located? ▼
Benjamin Janson, M.D. is located at 2629 NORTHGATE DR, Iowa City, IA, 52245. Phone: (319) 338-3626.
What is Benjamin Janson, M.D.'s NPI number? ▼
Benjamin Janson, M.D.'s National Provider Identifier (NPI) is 1275957623, issued on 02/05/2014.
Does Benjamin Janson, M.D. prescribe more brand-name or generic drugs? ▼
Benjamin Janson, M.D.'s prescribing is 17% brand-name and 83% generic drugs by claim count, with $20K in brand drug costs.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,388 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,490 Medicare Part D claims per year.
What drugs does Benjamin Janson, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Benjamin Janson, M.D.'s most frequently prescribed drugs include Latanoprost, Ketorolac Tromethamine, Timolol Maleate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Benjamin Janson, M.D. accept Medicare? ▼
Benjamin Janson, M.D. appears in CMS Medicare data with 714 Part D claims and 182 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Benjamin Janson, M.D.'s credentials? ▼
Benjamin Janson, M.D.'s NPI is 1275957623 with credentials M.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.