2026 NPPES data Periodontics NPI 1992916902 D.D.S.
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HARRY HARALAMPOPOULOS, D.D.S.

Periodontics in OAK LAWN, 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
279
Medicare Part D claims · 121 beneficiaries · Periodontics avg: 264
What the federal data reveals: HARRY HARALAMPOPOULOS, D.D.S. is a Periodontics ([object Object]) practicing in OAK LAWN, Illinois with a Medicare Part D prescribing footprint of 279 claims across 121 beneficiaries .

What stands out: HARRY HARALAMPOPOULOS, D.D.S. filed 279 Medicare Part D claims in 2023 across OAK LAWN, Illinois. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

HARRY HARALAMPOPOULOS, D.D.S. at a glance

Quality data not reported

NPI registry status

Active

Issued 05/24/2007

NPI 1992916902

Primary specialty

Periodontics

Mid-sized

6,061 US NPIs in this specialty

Medicare Part D claims

279 6% vs specialty avg

2023 prescription claims

Specialty avg: 264

Specialty distribution in Illinois

How Periodontics compares to other specialties among Illinois providers

Illinois providers

Periodontics share within Illinois

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

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).

HARRY HARALAMPOPOULOS, D.D.S. is a Periodontics provider practicing in OAK LAWN, Illinois, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: D.D.S.. NPI: 1992916902. 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.

HARRY HARALAMPOPOULOS, D.D.S. appears in the CMS NPPES registry as a Periodontics provider holding D.D.S. credentials at 4235 W 95TH ST, OAK LAWN, IL, 60453, with a listed phone of (708) 499-2424. NPI 1992916902 was issued on 05/24/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HARALAMPOPOULOS 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 279 prescription claims written by this provider, covering 121 Medicare beneficiaries and totaling roughly $3K in drug spend, with an opioid prescribing rate of 27.6%. 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

4235 W 95TH ST
OAK LAWN, IL 60453

Provider Details

NPI 1992916902
Specialty Periodontics
Credentials D.D.S.
Gender Male
NPI Issued 05/24/2007

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 HARRY HARALAMPOPOULOS, D.D.S.. To verify HARRY HARALAMPOPOULOS, D.D.S.'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.

Medicare Part D Prescribing Data

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

279
Total Claims
$3K
Total Drug Cost
121
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
282
Total Day Supply
1,899
Brand Drug Cost
$0
Generic Drug Cost
$3K
Opioid Claims
77 (27.6% rate)
Antibiotic Claims
178

Patient Demographics

Average Patient Age
74.4 years
Avg HCC Risk Score
0.86
Gender Split
66% female / 34% 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
Doxycycline Hyclate
89
Amoxicillin
80
Acetaminophen-Codeine
Acetaminophen With Codeine
76
Ibuprofen
19

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

Periodontics Overview

How HARRY HARALAMPOPOULOS, D.D.S. fits within the Periodontics landscape nationally.

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

HARRY HARALAMPOPOULOS, D.D.S.'s 279 claims are above the specialty average of 264.

Nearby Periodontics Providers in Illinois

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

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

Frequently Asked Questions

What is HARRY HARALAMPOPOULOS, D.D.S.'s specialty?
HARRY HARALAMPOPOULOS, D.D.S. specializes in Periodontics and practices in OAK LAWN, Illinois. Credentials: D.D.S..
How much does HARRY HARALAMPOPOULOS, D.D.S. prescribe under Medicare Part D?
In 2023, HARRY HARALAMPOPOULOS, D.D.S. wrote 279 Medicare Part D claims totaling $3K in drug costs for 121 beneficiaries.
Where is HARRY HARALAMPOPOULOS, D.D.S. located?
HARRY HARALAMPOPOULOS, D.D.S. is located at 4235 W 95TH ST, OAK LAWN, IL, 60453. Phone: (708) 499-2424.
What is HARRY HARALAMPOPOULOS, D.D.S.'s NPI number?
HARRY HARALAMPOPOULOS, D.D.S.'s National Provider Identifier (NPI) is 1992916902, issued on 05/24/2007.
Does HARRY HARALAMPOPOULOS, D.D.S. prescribe opioids?
Yes, HARRY HARALAMPOPOULOS, D.D.S. had 77 opioid claims in 2023 with an opioid prescribing rate of 27.6%.
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 HARRY HARALAMPOPOULOS, D.D.S. prescribe most often?
Based on 2023 Medicare Part D data, HARRY HARALAMPOPOULOS, D.D.S.'s most frequently prescribed drugs include Doxycycline Hyclate, Amoxicillin, Acetaminophen-Codeine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does HARRY HARALAMPOPOULOS, D.D.S. accept Medicare?
HARRY HARALAMPOPOULOS, D.D.S. appears in CMS Medicare data with 279 Part D claims and 121 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify HARRY HARALAMPOPOULOS, D.D.S.'s credentials?
HARRY HARALAMPOPOULOS, D.D.S.'s NPI is 1992916902 with credentials D.D.S.. 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