Doctor profile · Federal record
Dr. Alan Chang, M.D.
Endocrinology, Diabetes & Metabolism Physician (CMS: Endocrinology) · Endocrinology, Diabetes & Metabolism Physician · East Setauket, NY
- NPI 1649408675
- Accepts Medicare
- MIPS 91.4 / 100 · 2023
- 17 yrs in practice
- Licensed in 2 states
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
4 Technology Dr Ste 104
East Setauket, NY 117334080
(631) 444-0580
fax (631) 444-0562 - Mailing address
-
Po Box 1559
Stony Brook, NY 117900989
Credentials & registration
- NPI registered
- June 2009 — 17 yrs on file
- Profile last updated
- November 4, 2019
- Year of graduation
- 2009 — 17 yrs since
- Specialty taxonomy
- 207RE0101X — NUCC code
- State licenses (2)
- New York #301834 · Pennsylvania #MD452043
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1649408675. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
871
Distinct HCPCS
10
Medicare allowed
$103,496
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 358 | 249 | $149 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 141 | 134 | $153 | |
95251 |
Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | 73 | 44 | $40 | |
82947 |
Blood glucose (sugar) level | 67 | 52 | $4 | |
83036 |
Hemoglobin a1c level | 61 | 55 | $10 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 56 | 56 | $198 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 23 | 21 | $211 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 23 | 16 | $92 | |
99443 |
Telephone medical discussion with physician, 21-30 minutes | 20 | 18 | $149 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 18 | 17 | $107 |
In context: peer comparison
Among 5 peers in East Setauket Endocrinology, Diabetes & Metabolism Physician, average services per provider: 114. This provider delivers 7.6× the peer median.Open Payments
Industry payments received
All-time total
$671
Transactions
7
Manufacturers
6
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbott Laboratories | 2 | $345.95 | |
| Insulet Corporation | 1 | $125.01 | |
| Novo Nordisk INC | 1 | $99.65 | |
| Radius Health, INC. | 1 | $49.54 | |
| Beta Bionics, INC. | 1 | $29.91 | |
| Xeris Pharmaceuticals, INC. | 1 | $20.96 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,185
Patients
364
Total drug cost
$805,641
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 307 | 77 | $6,183 |
| Ozempic (Semaglutide) | Brand | 211 | 59 | $419,597 |
| Metformin Hcl ER (Metformin Hcl) | Brand | 118 | 40 | $2,690 |
| Metformin Hcl | Generic | 77 | 21 | $853 |
| Lantus Solostar (Insulin Glargine,Hum.Rec.Anlog) | Brand | 67 | 24 | $57,469 |
| Atorvastatin Calcium | Generic | 65 | 22 | $1,042 |
| Novolog Flexpen (Insulin Aspart) | Brand | 57 | 23 | $112,388 |
| Nano 2Nd Gen Pen Needle (Pen Needle, Diabetic) | Brand | 52 | 28 | $8,903 |
| Basaglar Kwikpen U-100 (Insulin Glargine,Hum.Rec.Anlog) | Brand | 41 | 17 | $21,830 |
| Jardiance (Empagliflozin) | Brand | 37 | 14 | $58,555 |
Frequently asked questions
What is Dr. Alan Chang's medical specialty?
Dr. Alan Chang practices Endocrinology, Diabetes & Metabolism Physician in East Setauket, NY.
Where does Dr. Alan Chang practice?
Dr. Alan Chang practices at 4 Technology Dr Ste 104, East Setauket, NY 117334080. Office phone: 6314440580.
What is Dr. Alan Chang's NPI?
Dr. Alan Chang's National Provider Identifier (NPI) is 1649408675, issued by NPPES.
Does Dr. Alan Chang accept Medicare assignment?
Yes. Dr. Alan Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Alan Chang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222); Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (HCPCS 95251). Source: CMS Medicare Physician & Other Practitioners file.