2026 NPPES data Periodontics NPI 1639258965 DMD LLC
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JOHN LOUIS, DMD LLC

Periodontics in EASTON, Maryland. 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
349
Medicare Part D claims · 161 beneficiaries · Periodontics avg: 264
What the federal data reveals: JOHN LOUIS, DMD LLC is a Periodontics ([object Object]) practicing in EASTON, Maryland with a Medicare Part D prescribing footprint of 349 claims across 161 beneficiaries .

What stands out: JOHN LOUIS, DMD LLC filed 349 Medicare Part D claims in 2023 across EASTON, Maryland. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

JOHN LOUIS, DMD LLC at a glance

Quality data not reported

NPI registry status

Active

Issued 11/06/2006

NPI 1639258965

Primary specialty

Periodontics

Mid-sized

6,061 US NPIs in this specialty

Medicare Part D claims

349 32% vs specialty avg

2023 prescription claims

Specialty avg: 264

Specialty distribution in Maryland

How Periodontics compares to other specialties among Maryland providers

Maryland providers

Periodontics share within Maryland

1. Periodontics42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Periodontics share within Maryland

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Periodontics) — 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).

JOHN LOUIS, DMD LLC is a Periodontics provider practicing in EASTON, Maryland, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: DMD LLC. NPI: 1639258965. 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.

JOHN LOUIS, DMD LLC appears in the CMS NPPES registry as a Periodontics provider holding DMD LLC credentials at 218 BAY STREET, EASTON, MD, 21601, with a listed phone of (410) 820-9599. NPI 1639258965 was issued on 11/06/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LOUIS 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 349 prescription claims written by this provider, covering 161 Medicare beneficiaries and totaling roughly $2K in drug spend, with an opioid prescribing rate of 5.2%. 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.

Periodontics is a mid-sized specialty nationwide, with 6,061 enrolled providers across 53 states and an average of 264 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

218 BAY STREET
EASTON, MD 21601

Provider Details

NPI 1639258965
Specialty Periodontics
Credentials DMD LLC
Gender Male
NPI Issued 11/06/2006

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

349
Total Claims
$2K
Total Drug Cost
161
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
353
Total Day Supply
2,343
Generic Drug Cost
$2K
Opioid Claims
18 (5.2% rate)
Antibiotic Claims
232

Patient Demographics

Average Patient Age
74.8 years
Avg HCC Risk Score
0.79
Gender Split
55% female / 45% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Amoxicillin
177
Ibuprofen
89
Azithromycin
16
Cephalexin
15
Acetaminophen-Codeine
Acetaminophen With Codeine
14

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

Periodontics Overview

How JOHN LOUIS, DMD LLC fits within the Periodontics landscape nationally.

6,061
Periodontics Providers in US
53
States with Periodontics
264
Avg Claims per Provider

JOHN LOUIS, DMD LLC's 349 claims are above the specialty average of 264.

Nearby Periodontics Providers in Maryland

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

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

Frequently Asked Questions

What is JOHN LOUIS, DMD LLC's specialty?
JOHN LOUIS, DMD LLC specializes in Periodontics and practices in EASTON, Maryland. Credentials: DMD LLC.
How much does JOHN LOUIS, DMD LLC prescribe under Medicare Part D?
In 2023, JOHN LOUIS, DMD LLC wrote 349 Medicare Part D claims totaling $2K in drug costs for 161 beneficiaries.
Where is JOHN LOUIS, DMD LLC located?
JOHN LOUIS, DMD LLC is located at 218 BAY STREET, EASTON, MD, 21601. Phone: (410) 820-9599.
What is JOHN LOUIS, DMD LLC's NPI number?
JOHN LOUIS, DMD LLC's National Provider Identifier (NPI) is 1639258965, issued on 11/06/2006.
Does JOHN LOUIS, DMD LLC prescribe opioids?
Yes, JOHN LOUIS, DMD LLC had 18 opioid claims in 2023 with an opioid prescribing rate of 5.2%.
How many Periodontics providers are there in the US?
There are 6,061 Periodontics providers across 53 states in the US. The average Periodontics provider writes 264 Medicare Part D claims per year.
What drugs does JOHN LOUIS, DMD LLC prescribe most often?
Based on 2023 Medicare Part D data, JOHN LOUIS, DMD LLC's most frequently prescribed drugs include Amoxicillin, Ibuprofen, Azithromycin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOHN LOUIS, DMD LLC accept Medicare?
JOHN LOUIS, DMD LLC appears in CMS Medicare data with 349 Part D claims and 161 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOHN LOUIS, DMD LLC's credentials?
JOHN LOUIS, DMD LLC's NPI is 1639258965 with credentials DMD LLC. 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