Ayham Chamseddin, M.D.
Endocrinology, Diabetes & Metabolism
With over 30 years in internal medicine, Ayham Chamseddin, M.D. is a long-established endocrinology, diabetes & metabolism specialist in Oshkosh. With 30+ years of experience, he has been practicing in the Oshkosh area. Among his Medicare patients, common conditions include hypertension, diabetes, and high cholesterol (per CMS data).
Older · 1618dNPPES updated 2021-11-30 · verify on CMS
How Does This Doctor Compare?
Generic Rx
↑ Higher = better46.6%
Wisconsin avg: 82.2 · US avg: 82.8
⚠ Lower than most doctors nationally(-36.2 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
159
Unique beneficiaries
Standard volumePrescription Recipients
196
Patients prescribed
Prescriptions Written
1,816
Total claims
Total Medicare drug cost: $1.05M
Percentile rankings compared against 779 reporting peers in Wisconsin.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, Diabetes, and High Cholesterol.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↑ More patients than average (+41%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↑ More patients than average (+20%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-3%) — less common here
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-1%) — less common here
Conditions affecting emotional state, including depression and bipolar disorder
A mood disorder causing persistent sadness and loss of interest in activities
US avg: 31.8%↓ Fewer patients than average (-4%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$71 received from industry
1 transaction reported in 2024 ·Low tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Ayham Chamseddin's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Board certified · Nov 29, 2021
CMS-verified certification date
30 years in practice
Senior practitioner
Endocrinologists treat hormonal and metabolic disorders including diabetes (type 1 and 2), thyroid disease, osteoporosis, adrenal disorders, pituitary conditions, and polycystic ovary syndrome (PCOS).
Taxonomy: 207RE0101X
Virtual Endocrinology, Diabetes & Metabolism Care With Ayham Chamseddin
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Ayham Chamseddin for blood pressure monitoring, diabetes check-ins, cholesterol management — no travel to Oshkosh required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Ayham Chamseddin
NPI records show Dr. Chamseddin as active with telehealth listed in Oshkosh, WI. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (920) 303-8700.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.
Contact Ayham Chamseddin
Practice Location
855 N Westhaven Dr, Oshkosh, WI 54904-7668
Mailing Address
855 N Westhaven Dr, Oshkosh, WI 54904-7668
This is a provider directory. Contact the office directly to schedule appointments.
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