Doctor profile · Federal record
Dr. Ayham Chamseddin, M.D.
Endocrinology, Diabetes & Metabolism Physician (CMS: Endocrinology) · Endocrinology, Diabetes & Metabolism Physician · Oshkosh, WI
- NPI 1932135324
- Accepts Medicare
- 30 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
855 N Westhaven Dr
Oshkosh, WI 549047668
(920) 303-8700
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- November 30, 2021
- Year of graduation
- 1996 — 30 yrs since
- Specialty taxonomy
- 207RE0101X — NUCC code
- State licenses (2)
- Wisconsin #49699-20 · Florida #ME113565
- Medicaid
- WI #34717100
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1932135324. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
364
Distinct HCPCS
4
Medicare allowed
$32,581
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
G0108 |
Diabetes outpatient self-management training services, individual, per 30 minutes | 179 | 87 | $52 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 129 | 76 | $170 | |
99211 |
Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional | 42 | 18 | $22 | |
95251 |
Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | 14 | 13 | $31 |
In context: peer comparison
Among 1 peers in Oshkosh Endocrinology, Diabetes & Metabolism Physician, average services per provider: 91. This provider delivers 4.0× the peer median.Open Payments
Industry payments received
All-time total
$71
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, INC. | 1 | $70.97 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,166
Patients
292
Total drug cost
$741,092
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 237 | 61 | $4,868 |
| Jardiance (Empagliflozin) | Brand | 182 | 37 | $191,243 |
| Ezetimibe | Generic | 101 | 26 | $3,861 |
| Lantus Solostar (Insulin Glargine,Hum.Rec.Anlog) | Brand | 88 | 28 | $85,009 |
| Trulicity (Dulaglutide) | Brand | 74 | 17 | $114,363 |
| Metformin Hcl | Generic | 64 | 22 | $849 |
| Soliqua 100-33 (Insulin Glargine/Lixisenatide) | Brand | 60 | 16 | $102,045 |
| Rosuvastatin Calcium | Generic | 56 | 17 | $2,426 |
| Methimazole | Generic | 53 | 16 | $795 |
| Mounjaro (Tirzepatide) | Brand | 52 | 11 | $84,800 |
Hospital affiliations
Frequently asked questions
What is Dr. Ayham Chamseddin's medical specialty?
Dr. Ayham Chamseddin practices Endocrinology, Diabetes & Metabolism Physician in Oshkosh, WI.
Where does Dr. Ayham Chamseddin practice?
Dr. Ayham Chamseddin practices at 855 N Westhaven Dr, Oshkosh, WI 549047668. Office phone: 9203038700.
What is Dr. Ayham Chamseddin's NPI?
Dr. Ayham Chamseddin's National Provider Identifier (NPI) is 1932135324, issued by NPPES.
Does Dr. Ayham Chamseddin accept Medicare assignment?
Yes. Dr. Ayham Chamseddin accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ayham Chamseddin commonly perform?
Top Medicare-reported procedures in 2023: Diabetes outpatient self-management training services, individual, per 30 minutes (HCPCS G0108); Established patient office or other outpatient visit (HCPCS 99215); Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional (HCPCS 99211). Source: CMS Medicare Physician & Other Practitioners file.