2026 NPPES data Optometrist NPI 1841230521 O.D.
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DENNIS MULLER, O.D.

Optometrist in CHALMETTE, Louisiana. 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
463
Medicare Part D claims · 144 beneficiaries · Optometrist avg: 257
Generic prescribing
67%
generic claims · 33% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

DENNIS MULLER, O.D. filed 463 Medicare Part D claims in 2023 as a Optometrist in CHALMETTE, Louisiana, prescribing 67% generic.

463
Part D claims, 2023
67%
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.

DENNIS MULLER, O.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

463 Top 38% higher than 62% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 DENNIS MULLER, O.D.?

Quality data not reported

NPI registry status

Active

Issued 06/08/2006

NPI 1841230521

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

463 80% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Louisiana

How Optometrist compares to other specialties among Louisiana providers

Louisiana providers

Optometrist share within Louisiana

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

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).

DENNIS MULLER, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 9128 W JUDGE PEREZ DR STE C, CHALMETTE, LA, 70043, with a listed phone of (504) 281-2242. NPI 1841230521 was issued on 06/08/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MULLER 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 463 prescription claims written by this provider, covering 144 Medicare beneficiaries and totaling roughly $27K in drug spend, split 33% brand-name and 67% 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

9128 W JUDGE PEREZ DR STE C
CHALMETTE, LA 70043

Provider Details

NPI 1841230521
Specialty Optometrist
Credentials O.D.
Gender Male
NPI Issued 06/08/2006

Brand vs generic prescribing mix · Above average

DENNIS MULLER, O.D. — brand share 33.0%
Specialty average (est.)

33% brand-name claims vs 67% generic, on 463 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.

463
Total Claims
$27K
Total Drug Cost
144
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
646
Total Day Supply
16,536
Brand vs Generic
33% brand / 67% generic
Brand Drug Cost
$21K
Generic Drug Cost
$6K
Antibiotic Claims
20

Patient Demographics

Average Patient Age
70.1 years
Avg HCC Risk Score
1.48
Gender Split
56% female / 44% male
Age Distribution
<65: 31, 65-74: 65, 75-84: 36, 85+: 12

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What DENNIS MULLER, O.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Latanoprost
209
Prednisolone Acetate
51
Timolol Maleate
33
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
31
Brimonidine Tartrate
21
Azithromycin
14
Dorzolamide Hcl
13

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

Optometrist Overview

How DENNIS MULLER, O.D. fits within the Optometrist landscape nationally.

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

DENNIS MULLER, O.D.'s 463 claims are above the specialty average of 257.

Nearby Optometrist Providers in Louisiana

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

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

Frequently Asked Questions

What is DENNIS MULLER, O.D.'s specialty?
DENNIS MULLER, O.D. specializes in Optometrist and practices in CHALMETTE, Louisiana. Credentials: O.D..
How much does DENNIS MULLER, O.D. prescribe under Medicare Part D?
In 2023, DENNIS MULLER, O.D. wrote 463 Medicare Part D claims totaling $27K in drug costs for 144 beneficiaries.
Where is DENNIS MULLER, O.D. located?
DENNIS MULLER, O.D. is located at 9128 W JUDGE PEREZ DR STE C, CHALMETTE, LA, 70043. Phone: (504) 281-2242.
What is DENNIS MULLER, O.D.'s NPI number?
DENNIS MULLER, O.D.'s National Provider Identifier (NPI) is 1841230521, issued on 06/08/2006.
Does DENNIS MULLER, O.D. prescribe more brand-name or generic drugs?
DENNIS MULLER, O.D.'s prescribing is 33% brand-name and 67% generic drugs by claim count, with $21K 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 DENNIS MULLER, O.D. prescribe most often?
Based on 2023 Medicare Part D data, DENNIS MULLER, O.D.'s most frequently prescribed drugs include Latanoprost, Prednisolone Acetate, Timolol Maleate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does DENNIS MULLER, O.D. accept Medicare?
DENNIS MULLER, O.D. appears in CMS Medicare data with 463 Part D claims and 144 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify DENNIS MULLER, O.D.'s credentials?
DENNIS MULLER, O.D.'s NPI is 1841230521 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