2026 NPPES data Optometrist NPI 1134289754 OD
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CATHY ALEXANDER, OD

Optometrist in ROCKFORD, Illinois. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
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
What the federal data reveals: CATHY ALEXANDER, OD is a Optometrist ([object Object]) practicing in ROCKFORD, Illinois with a Medicare Part D prescribing footprint of 558 claims across 167 beneficiaries — 45% brand-name prescribing .

What stands out: CATHY ALEXANDER, OD filed 558 Medicare Part D claims in 2023 across ROCKFORD, Illinois. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

CATHY ALEXANDER, OD at a glance

Quality data not reported

NPI registry status

Active

Issued 12/12/2006

NPI 1134289754

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

558 117% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Illinois

How Optometrist compares to other specialties among Illinois providers

Illinois providers

Optometrist share within Illinois

1. Optometrist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Optometrist share within Illinois

Specialty board-certification context

Estimated specialty board-certified rate — Optometrist (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Optometrist ABMS/AOA estimate

Est. board-certified rate (Optometrist) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Optometrist) — ABMS / AOA estimate

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 is a Optometrist provider practicing in ROCKFORD, Illinois, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: OD. NPI: 1134289754. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

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. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ALEXANDER most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

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. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

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

2300 N ROCKTON AVE
ROCKFORD, IL 61103

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%
Specialty average (est.)

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.

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.

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 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

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