2026 NPPES data Plastic Surgery Physician NPI 1629176003 MD
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GEOFFREY FENNER, MD

Plastic Surgery Physician in KENILWORTH, 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
403
Medicare Part D claims · 110 beneficiaries · Plastic Surgery Physician avg: 84
Generic prescribing
97%
generic claims · 3% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$110.85
4 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: GEOFFREY FENNER, MD is a Plastic Surgery Physician ([object Object]) practicing in KENILWORTH, Illinois with a Medicare Part D prescribing footprint of 403 claims across 110 beneficiaries — 3% brand-name prescribing . Industry payments of $110.85 across 4 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: GEOFFREY FENNER, MD filed 403 Medicare Part D claims in 2023 across KENILWORTH, Illinois. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

GEOFFREY FENNER, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

GEOFFREY FENNER, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 09/20/2006

NPI 1629176003

Primary specialty

Plastic Surgery Physician

Mid-sized

5,316 US NPIs in this specialty

Medicare Part D claims

403 380% vs specialty avg

2023 prescription claims

Specialty avg: 84

Specialty distribution in Illinois

How Plastic Surgery Physician compares to other specialties among Illinois providers

Illinois providers

Plastic Surgery Physician share within Illinois

1. Plastic Surgery Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Plastic Surgery Physician share within Illinois

Specialty board-certification context

Estimated specialty board-certified rate — Plastic Surgery Physician (ABMS / AOA reference)

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

Est. board-certified rate (Plastic Surgery Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Plastic Surgery Physician) — 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).

GEOFFREY FENNER, MD is a Plastic Surgery Physician provider practicing in KENILWORTH, Illinois, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1629176003. 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.

GEOFFREY FENNER, MD appears in the CMS NPPES registry as a Plastic Surgery Physician provider holding MD credentials at 512 GREEN BAY ROAD, KENILWORTH, IL, 60043, with a listed phone of (847) 716-2400. NPI 1629176003 was issued on 09/20/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FENNER 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 403 prescription claims written by this provider, covering 110 Medicare beneficiaries and totaling roughly $5K in drug spend, split 3% brand-name and 97% generic by claim count, with an opioid prescribing rate of 18.9%. 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.

Plastic Surgery Physician is a mid-sized specialty nationwide, with 5,316 enrolled providers across 52 states and an average of 84 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

512 GREEN BAY ROAD
KENILWORTH, IL 60043

Provider Details

NPI 1629176003
Specialty Plastic Surgery Physician
Credentials MD
Gender Male
NPI Issued 09/20/2006

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for GEOFFREY FENNER, MD. Source: openpaymentsdata.cms.gov.

Total received

$111

Largest payer

Mentor Worldwide LLC

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

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 GEOFFREY FENNER, MD. To verify GEOFFREY FENNER, MD'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 · Generic-heavy

GEOFFREY FENNER, MD — brand share 3.0%
Specialty average (est.)

3% brand-name claims vs 97% generic, on 403 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.

403
Total Claims
$5K
Total Drug Cost
110
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
412
Total Day Supply
2,878
Brand vs Generic
3% brand / 97% generic
Brand Drug Cost
$388
Generic Drug Cost
$5K
Opioid Claims
76 (18.9% rate)
Antibiotic Claims
165

Patient Demographics

Average Patient Age
72.0 years
Avg HCC Risk Score
0.84

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-Clavulanate Potass
Amoxicillin/Potassium Clav
112
Ondansetron Odt
Ondansetron
67
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
40
Methylprednisolone
39
Tramadol Hcl
30
Sulfamethoxazole-Trimethoprim
Sulfamethoxazole/Trimethoprim
27
Cyclobenzaprine Hcl
13

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

Plastic Surgery Physician Overview

How GEOFFREY FENNER, MD fits within the Plastic Surgery Physician landscape nationally.

5,316
Plastic Surgery Physician Providers in US
52
States with Plastic Surgery Physician
84
Avg Claims per Provider

GEOFFREY FENNER, MD's 403 claims are above the specialty average of 84.

Nearby Plastic Surgery Physician Providers in Illinois

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

Compare Plastic Surgery Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GEOFFREY FENNER, MD's specialty?
GEOFFREY FENNER, MD specializes in Plastic Surgery Physician and practices in KENILWORTH, Illinois. Credentials: MD.
How much does GEOFFREY FENNER, MD prescribe under Medicare Part D?
In 2023, GEOFFREY FENNER, MD wrote 403 Medicare Part D claims totaling $5K in drug costs for 110 beneficiaries.
Where is GEOFFREY FENNER, MD located?
GEOFFREY FENNER, MD is located at 512 GREEN BAY ROAD, KENILWORTH, IL, 60043. Phone: (847) 716-2400.
What is GEOFFREY FENNER, MD's NPI number?
GEOFFREY FENNER, MD's National Provider Identifier (NPI) is 1629176003, issued on 09/20/2006.
Does GEOFFREY FENNER, MD prescribe more brand-name or generic drugs?
GEOFFREY FENNER, MD's prescribing is 3% brand-name and 97% generic drugs by claim count, with $388 in brand drug costs.
Does GEOFFREY FENNER, MD prescribe opioids?
Yes, GEOFFREY FENNER, MD had 76 opioid claims in 2023 with an opioid prescribing rate of 18.9%.
How many Plastic Surgery Physician providers are there in the US?
There are 5,316 Plastic Surgery Physician providers across 52 states in the US. The average Plastic Surgery Physician provider writes 84 Medicare Part D claims per year.
What drugs does GEOFFREY FENNER, MD prescribe most often?
Based on 2023 Medicare Part D data, GEOFFREY FENNER, MD's most frequently prescribed drugs include Amoxicillin-Clavulanate Potass, Ondansetron Odt, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does GEOFFREY FENNER, MD accept Medicare?
GEOFFREY FENNER, MD appears in CMS Medicare data with 403 Part D claims and 110 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GEOFFREY FENNER, MD's credentials?
GEOFFREY FENNER, MD's NPI is 1629176003 with credentials MD. 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