NPI registry status
Active
2026 NPPES data Optometrist NPI 1679656581 O.D.
Verify on CMS → Irene Rosenberg, O.D.
Optometrist in Wilton, Connecticut.
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
138
Medicare Part D claims · 44 beneficiaries · Optometrist avg: 279
Generic prescribing
58%
generic claims · 42% 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
Irene Rosenberg, O.D. filed 138 Medicare Part D claims in 2024 as an Optometrist in Wilton, Connecticut, prescribing 58% generic.
- 138
- Part D claims, 2024
- 58%
- generic prescribing
- ≥34th
- 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 Irene Rosenberg, O.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 1679656581), first enumerated 10/23/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 138 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- 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 1679656581 · Optometrist
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1679656581
- ENUM-LEGACY 2006
- TAX-MEGA 61K Optometrist
- RX-LIGHT 138
- BOOK-LIGHT 653 in Connecticut
- PHOTO-ENUM John Blewett, O.D. · 2006
Irene Rosenberg, O.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
138 ≥ 34th percentile 34% 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 Irene Rosenberg, O.D.?
Quality data not reportedPrimary specialty
Optometrist
Medicare Part D claims
138 51% vs specialty avg
Specialty distribution in Connecticut
How Optometrist compares to other specialties among Connecticut 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 | 1679656581 |
|---|---|
| Specialty | Optometrist |
| Credentials | O.D. |
| Gender | Female |
| NPI Issued | 10/23/2006 |
Hospital and facility affiliations
Facilities where Irene Rosenberg, O.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.
Wilton Optometry Associates
Wilton, CT
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 · Above average
Irene Rosenberg, O.D. - brand share 42.0%
Optometrist average
42% brand-name claims vs 58% generic, on 138 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.
138
Total Claims
$39K
Total Drug Cost
44
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 213.1
- Total Day Supply
- 5,516
- Brand vs Generic
- 42% brand / 58% generic
- Brand Drug Cost
- $36K
- Generic Drug Cost
- $3K
Patient Demographics
- Average Patient Age
- 75.8 years
- Avg HCC Risk Score
- 0.82
- Gender Split
- 64% female / 36% male
- Age Distribution
- <65: 0, 65-74: 24, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Irene Rosenberg, O.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Restasis
Restasis
31 claims
- Dorzolamide-Timolol
Dorzolamide-Timolol
21 claims
- Latanoprost
Latanoprost
21 claims
| Drug | Claims |
|---|---|
| Restasis Cyclosporine | 31 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 21 |
| Latanoprost | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Optometrist Overview
How Irene Rosenberg, O.D. fits within the Optometrist landscape nationally.
61,426
Optometrist Providers in US
56
States with Optometrist
279
Avg Claims per Provider
Irene Rosenberg, O.D.'s 138 claims are below the specialty average of 279.
Nationwide Optometrist peers with similar MIPS or enrollment year
Two federal-record peer sets for Rosenberg, both outside Connecticut so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Optometrist Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Rosenberg.
One of 653 Optometrist providers enrolled in Connecticut, 5 are shown here.
Dr. Annemarie Abramson
O.D.
Waterbury, CT
Dr. Aylin Adem
OD
Naugatuck, CT
Dr. George Adrian
O.D.
Groton, CT
Dr. Douglas Agranov
O.D.
Madison, CT
Shraiy Agrawal
Guilford, CT
Compare Optometrist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Irene Rosenberg, O.D.'s specialty? ▼
Irene Rosenberg, O.D. specializes in Optometrist and practices in Wilton, Connecticut. Credentials: O.D..
How much does Irene Rosenberg, O.D. prescribe under Medicare Part D? ▼
In 2024, Irene Rosenberg, O.D. wrote 138 Medicare Part D claims totaling $39K in drug costs for 44 beneficiaries.
Where is Irene Rosenberg, O.D. located? ▼
Irene Rosenberg, O.D. is located at 237 DANBURY RD, Wilton, CT, 06897. Phone: (203) 761-9119.
What is Irene Rosenberg, O.D.'s NPI number? ▼
Irene Rosenberg, O.D.'s National Provider Identifier (NPI) is 1679656581, issued on 10/23/2006.
Does Irene Rosenberg, O.D. prescribe more brand-name or generic drugs? ▼
Irene Rosenberg, O.D.'s prescribing is 42% brand-name and 58% generic drugs by claim count, with $36K 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 Irene Rosenberg, O.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Irene Rosenberg, O.D.'s most frequently prescribed drugs include Restasis, Dorzolamide-Timolol, Latanoprost. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Irene Rosenberg, O.D. accept Medicare? ▼
Irene Rosenberg, O.D. appears in CMS Medicare data with 138 Part D claims and 44 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Irene Rosenberg, O.D.'s credentials? ▼
Irene Rosenberg, O.D.'s NPI is 1679656581 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.