Doctor profile · Federal record
Dr. Karen Tsai, M.D.
Endocrinology, Diabetes & Metabolism Physician (CMS: Endocrinology) · Duarte, CA
- NPI 1265973416
- Accepts Medicare
- MIPS 91.9 / 100 · 2023
- 9 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1500 Duarte RD
Duarte, CA 910103012
(626) 256-4673 - Mailing address
-
Po Box 512185
Los Angeles, CA 900510185
Credentials & registration
- NPI registered
- March 2017 — 9 yrs on file
- Profile last updated
- November 14, 2024
- Year of graduation
- 2017 — 9 yrs since
- Specialty taxonomy
- 207RE0101X — NUCC code
- State license (1)
- California #A157548
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1265973416. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,274
Distinct HCPCS
9
Medicare allowed
$132,918
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 617 | 131 | $83 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 240 | 175 | $102 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 133 | 83 | $115 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 99 | 95 | $137 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 91 | 91 | $140 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 36 | 31 | $151 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 30 | 30 | $166 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 16 | 13 | $165 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 12 | 12 | $190 |
In context: peer comparison
Among 4 peers in Duarte Endocrinology, Diabetes & Metabolism Physician, average services per provider: 104. This provider delivers 12× the peer median.Open Payments
Industry payments received
All-time total
$115
Transactions
5
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbott Laboratories | 2 | $53.39 | |
| Novo Nordisk INC | 2 | $32.20 | |
| Dexcom, INC. | 1 | $29.15 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
863
Patients
322
Total drug cost
$391,910
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 180 | 73 | $3,977 |
| Metformin Hcl ER (Metformin Hcl) | Brand | 119 | 48 | $3,780 |
| Ozempic (Semaglutide) | Brand | 104 | 21 | $145,980 |
| Trulicity (Dulaglutide) | Brand | 63 | 14 | $99,628 |
| Metformin Hcl | Generic | 58 | 22 | $1,245 |
| Atorvastatin Calcium | Generic | 49 | 27 | $1,165 |
| Rosuvastatin Calcium | Generic | 45 | 23 | $1,644 |
| Januvia (Sitagliptin Phosphate) | Brand | 38 | 12 | $38,376 |
| Nano 2Nd Gen Pen Needle (Pen Needle, Diabetic) | Brand | 32 | 19 | $4,186 |
| Amlodipine Besylate | Generic | 31 | 14 | $174 |
Frequently asked questions
What is Dr. Karen Tsai's medical specialty?
Dr. Karen Tsai practices Endocrinology, Diabetes & Metabolism Physician in Duarte, CA.
Where does Dr. Karen Tsai practice?
Dr. Karen Tsai practices at 1500 Duarte RD, Duarte, CA 910103012. Office phone: 6262564673.
What is Dr. Karen Tsai's NPI?
Dr. Karen Tsai's National Provider Identifier (NPI) is 1265973416, issued by NPPES.
Does Dr. Karen Tsai accept Medicare assignment?
Yes. Dr. Karen Tsai accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Karen Tsai commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.