NPI registry status
Active
2026 NPPES data Optometrist NPI 1134289754 OD
Verify on CMS → Cathy Alexander, OD
Optometrist in Rockford, Illinois.
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
698
Medicare Part D claims · 171 beneficiaries · Optometrist avg: 279
Generic prescribing
65%
generic claims · 35% 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
Cathy Alexander, OD filed 698 Medicare Part D claims in 2024 as an Optometrist in Rockford, Illinois, prescribing 65% generic.
- 698
- Part D claims, 2024
- 65%
- generic prescribing
- ≥68th
- 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 Cathy Alexander, OD
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 1134289754), first enumerated 12/12/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 698 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
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not Cathy Alexander, OD's individual license status. Verify directly with the state medical board.
Source: IDFPR annual report 2023
- 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 1134289754 · Optometrist
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1134289754
- ENUM-LEGACY 2006
- TAX-MEGA 61K Optometrist
- RX-LIGHT 698
- BOOK-LIGHT 2,629 in Illinois
- PHOTO-ENUM Robert Schoen · 2006
Cathy Alexander, OD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
698 ≥ 68th percentile 68% 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 Cathy Alexander, OD?
Quality data not reportedPrimary specialty
Optometrist
Medicare Part D claims
698 150% vs specialty avg
Specialty distribution in Illinois
How Optometrist compares to other specialties among Illinois 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 | 1134289754 |
|---|---|
| Specialty | Optometrist |
| Credentials | OD |
| Gender | Female |
| NPI Issued | 12/12/2006 |
Hospital and facility affiliations
Facilities where Cathy Alexander, 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.
Rockford Health Physicians
Rockford, IL
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Illinois IDFPR 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~42K Illinois medical licensees in 2023 - they are NOT specific to Cathy Alexander, OD. To verify Cathy Alexander, OD's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Cathy Alexander, OD - brand share 35.0%
Optometrist average
35% brand-name claims vs 65% generic, on 698 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.
698
Total Claims
$225K
Total Drug Cost
171
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,316.067
- Total Day Supply
- 37,760
- Brand vs Generic
- 35% brand / 65% generic
- Brand Drug Cost
- $209K
- Generic Drug Cost
- $15K
- Antibiotic Claims
- 14
Patient Demographics
- Average Patient Age
- 73.9 years
- Avg HCC Risk Score
- 1.61
- Gender Split
- 70% female / 30% male
- Age Distribution
- <65: 19, 65-74: 73, 75-84: 57, 85+: 22
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Cathy Alexander, OD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Latanoprost
Latanoprost
201 claims
- Timolol Maleate 78
Timolol Maleate
78 claims
- Brimonidine Tartrate 46
Brimonidine Tartrate
46 claims
- Dorzolamide-Timolol 42
Dorzolamide-Timolol
42 claims
- Prednisolone Acetate 39
Prednisolone Acetate
39 claims
- Travoprost 39
Travoprost
39 claims
- Restasis 20
Restasis
20 claims
- Azelastine Hcl 17
Azelastine Hcl
17 claims
| Drug | Claims |
|---|---|
| Latanoprost | 201 |
| Timolol Maleate | 78 |
| Brimonidine Tartrate | 46 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 42 |
| Prednisolone Acetate | 39 |
| Travoprost | 39 |
| Restasis Cyclosporine | 20 |
| Azelastine Hcl | 17 |
| Cyclosporine | 17 |
| Lumigan Bimatoprost | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Optometrist Overview
How Cathy Alexander, OD fits within the Optometrist landscape nationally.
61,426
Optometrist Providers in US
56
States with Optometrist
279
Avg Claims per Provider
Cathy Alexander, OD's 698 claims are above the specialty average of 279.
Nationwide Optometrist peers with similar MIPS or enrollment year
Two federal-record peer sets for Alexander, both outside Illinois 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 Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Alexander.
One of 2,629 Optometrist providers enrolled in Illinois, 5 are shown here.
Dr. Marvin Aal
O.D.
Chicago, IL
Dr. Russul Abbas
OD
Gurnee, IL
Dr. Sarah Abbott
OD
Park Ridge, IL
Dr. Mahmud Abdallah
OD
Alsip, IL
Nada Abdallah
Deerfield, IL
Compare Optometrist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Cathy Alexander, OD's specialty? ▼
Cathy Alexander, OD specializes in Optometrist and practices in Rockford, Illinois. Credentials: OD.
How much does Cathy Alexander, OD prescribe under Medicare Part D? ▼
In 2024, Cathy Alexander, OD wrote 698 Medicare Part D claims totaling $225K in drug costs for 171 beneficiaries.
Where is Cathy Alexander, OD located? ▼
Cathy Alexander, OD is located at 2300 N ROCKTON AVE, Rockford, IL, 61103. Phone: (815) 971-2000.
What is Cathy Alexander, OD's NPI number? ▼
Cathy Alexander, OD's National Provider Identifier (NPI) is 1134289754, issued on 12/12/2006.
Does Cathy Alexander, OD prescribe more brand-name or generic drugs? ▼
Cathy Alexander, OD's prescribing is 35% brand-name and 65% generic drugs by claim count, with $209K 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 Cathy Alexander, OD prescribe most often? ▼
Based on 2024 Medicare Part D data, Cathy Alexander, OD's most frequently prescribed drugs include Latanoprost, Timolol Maleate, Brimonidine Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Cathy Alexander, OD accept Medicare? ▼
Cathy Alexander, OD appears in CMS Medicare data with 698 Part D claims and 171 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Cathy Alexander, OD's credentials? ▼
Cathy Alexander, OD's NPI is 1134289754 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.
- 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.