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 60,463 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
558
Medicare Part D claims · 167 beneficiaries · Optometrist avg: 257
Generic prescribing
55%
generic claims · 45% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Cathy Alexander, OD filed 558 Medicare Part D claims in 2023 as a Optometrist in Rockford, Illinois, prescribing 55% generic.
- 558
- Part D claims, 2023
- 55%
- generic prescribing
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.
Cathy Alexander, OD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
558 Top 34% higher than 66% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Cathy Alexander, OD?
Quality data not reportedPrimary specialty
Optometrist
Medicare Part D claims
558 117% 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).
Cathy Alexander, OD appears in the CMS NPPES registry as a Optometrist provider holding OD credentials at 2300 N ROCKTON AVE, Rockford, IL, 61103, with a listed phone of (815) 971-2000. NPI 1134289754 was issued on 12/12/2006.
Medicare Part D records for calendar year 2023 show 558 prescription claims written by this provider, covering 167 Medicare beneficiaries and totaling roughly $132K in drug spend, split 45% brand-name and 55% generic by claim count.
Optometrist is a high-volume specialty nationwide, with 60,463 enrolled providers across 56 states and an average of 257 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
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 45.0%
Optometrist average
45% brand-name claims vs 55% generic, on 558 2023 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 2023.
558
Total Claims
$132K
Total Drug Cost
167
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,085
- Total Day Supply
- 31,295
- Brand vs Generic
- 45% brand / 55% generic
- Brand Drug Cost
- $112K
- Generic Drug Cost
- $21K
Patient Demographics
- Average Patient Age
- 74.0 years
- Avg HCC Risk Score
- 1.66
- Gender Split
- 70% female / 30% male
- Age Distribution
- <65: 24, 65-74: 64, 75-84: 52, 85+: 27
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Cathy Alexander, OD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Latanoprost
Latanoprost
159 claims
- Timolol Maleate
Timolol Maleate
66 claims
- Brimonidine Tartrate 34
Brimonidine Tartrate
34 claims
- Travoprost 31
Travoprost
31 claims
- Prednisolone Acetate 29
Prednisolone Acetate
29 claims
- Lumigan 22
Lumigan
22 claims
- Xiidra 20
Xiidra
20 claims
- Combigan 18
Combigan
18 claims
| Drug | Claims |
|---|---|
| Latanoprost | 159 |
| Timolol Maleate | 66 |
| Brimonidine Tartrate | 34 |
| Travoprost | 31 |
| Prednisolone Acetate | 29 |
| Lumigan Bimatoprost | 22 |
| Xiidra Lifitegrast | 20 |
| Combigan Brimonidine Tartrate/Timolol | 18 |
| Restasis Cyclosporine | 17 |
| Alphagan P Brimonidine Tartrate | 16 |
* 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.
60,463
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider
Cathy Alexander, OD's 558 claims are above the specialty average of 257.
Nearby Optometrist Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Alexander.
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 →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Illinois medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Optometrist peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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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 2023, Cathy Alexander, OD wrote 558 Medicare Part D claims totaling $132K in drug costs for 167 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 45% brand-name and 55% generic drugs by claim count, with $112K in brand drug costs.
How many Optometrist providers are there in the US? ▼
There are 60,463 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does Cathy Alexander, OD prescribe most often? ▼
Based on 2023 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 558 Part D claims and 167 Medicare beneficiaries in 2023. 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 (2023). 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 April 2026 (NPPES) / 2023 (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
Compiled from official public sources by the PlainDoctor editorial team.