2026 NPPES data Optometrist NPI 1366538886 O. D.
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CHARLES BEIER, O. D.

Optometrist in TOPEKA, Kansas. 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
316
Medicare Part D claims · 68 beneficiaries · Optometrist avg: 257
Generic prescribing
69%
generic claims · 31% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: CHARLES BEIER, O. D. is a Optometrist ([object Object]) practicing in TOPEKA, Kansas with a Medicare Part D prescribing footprint of 316 claims across 68 beneficiaries — 31% brand-name prescribing .

What stands out: CHARLES BEIER, O. D. filed 316 Medicare Part D claims in 2023 across TOPEKA, Kansas. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

CHARLES BEIER, O. D. at a glance

Quality data not reported

NPI registry status

Active

Issued 10/04/2006

NPI 1366538886

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

316 23% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Kansas

How Optometrist compares to other specialties among Kansas providers

Kansas providers

Optometrist share within Kansas

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

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).

CHARLES BEIER, O. D. is a Optometrist provider practicing in TOPEKA, Kansas, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: O. D.. NPI: 1366538886. 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.

CHARLES BEIER, O. D. appears in the CMS NPPES registry as a Optometrist provider holding O. D. credentials at 2400 S.W. 29TH ST., TOPEKA, KS, 66611, with a listed phone of (785) 266-3285. NPI 1366538886 was issued on 10/04/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BEIER 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 316 prescription claims written by this provider, covering 68 Medicare beneficiaries and totaling roughly $39K in drug spend, split 31% brand-name and 69% 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

2400 S.W. 29TH ST.
TOPEKA, KS 66611

Provider Details

NPI 1366538886
Specialty Optometrist
Credentials O. D.
Gender Male
NPI Issued 10/04/2006

Brand vs generic prescribing mix · Above average

CHARLES BEIER, O. D. — brand share 31.0%
Specialty average (est.)

31% brand-name claims vs 69% generic, on 316 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.

316
Total Claims
$39K
Total Drug Cost
68
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
513
Total Day Supply
14,424
Brand vs Generic
31% brand / 69% generic
Brand Drug Cost
$32K
Generic Drug Cost
$7K

Patient Demographics

Average Patient Age
81.5 years
Avg HCC Risk Score
1.32
Gender Split
63% female / 37% male
Age Distribution
<65: 0, 65-74: 11, 75-84: 31, 85+: 26

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
121
Lumigan
Bimatoprost
27
Dorzolamide Hcl
26
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
24
Timolol Maleate
24
Brimonidine Tartrate
20
Restasis
Cyclosporine
20
Travoprost
19
Combigan
Brimonidine Tartrate/Timolol
12

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Optometrist Overview

How CHARLES BEIER, O. D. fits within the Optometrist landscape nationally.

60,463
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider

CHARLES BEIER, O. D.'s 316 claims are above the specialty average of 257.

Nearby Optometrist Providers in Kansas

Other clinicians with the same primary specialty enrolled in Kansas, drawn from the same CMS NPPES roster as BEIER.

Compare Optometrist nationally: see state-by-state distribution →

Frequently Asked Questions

What is CHARLES BEIER, O. D.'s specialty?
CHARLES BEIER, O. D. specializes in Optometrist and practices in TOPEKA, Kansas. Credentials: O. D..
How much does CHARLES BEIER, O. D. prescribe under Medicare Part D?
In 2023, CHARLES BEIER, O. D. wrote 316 Medicare Part D claims totaling $39K in drug costs for 68 beneficiaries.
Where is CHARLES BEIER, O. D. located?
CHARLES BEIER, O. D. is located at 2400 S.W. 29TH ST., TOPEKA, KS, 66611. Phone: (785) 266-3285.
What is CHARLES BEIER, O. D.'s NPI number?
CHARLES BEIER, O. D.'s National Provider Identifier (NPI) is 1366538886, issued on 10/04/2006.
Does CHARLES BEIER, O. D. prescribe more brand-name or generic drugs?
CHARLES BEIER, O. D.'s prescribing is 31% brand-name and 69% generic drugs by claim count, with $32K 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 CHARLES BEIER, O. D. prescribe most often?
Based on 2023 Medicare Part D data, CHARLES BEIER, O. D.'s most frequently prescribed drugs include Latanoprost, Lumigan, Dorzolamide Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHARLES BEIER, O. D. accept Medicare?
CHARLES BEIER, O. D. appears in CMS Medicare data with 316 Part D claims and 68 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHARLES BEIER, O. D.'s credentials?
CHARLES BEIER, O. D.'s NPI is 1366538886 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

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