Doctor profile · Federal record
Dr. Ku-Juey Raymond Chang, M.D.
Endocrinology, Diabetes & Metabolism Physician (CMS: Nephrology) · Nephrology Physician · Lake Forest, CA
- NPI 1689611337
- Accepts Medicare
- 33 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
23331 El Toro RD, Suite 102
Lake Forest, CA 926304891
(949) 916-9100
fax (949) 916-0091 - Mailing address
-
Po Box 511345
Los Angeles, CA 900517900
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- December 2, 2015
- Year of graduation
- 1993 — 33 yrs since
- Specialty taxonomy
- 207RE0101X — NUCC code
- State license (1)
- California #G181497
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1689611337. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
22,798
Distinct HCPCS
10
Medicare allowed
$490,060
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 910 | 374 | $138 | |
36415 |
Insertion of needle into vein for collection of blood sample | 890 | 376 | $8 | |
80048 |
Blood test, basic group of blood chemicals (calcium, total) | 872 | 373 | $8 | |
83735 |
Magnesium level | 869 | 372 | $7 | |
84100 |
Phosphate level | 867 | 372 | $5 | |
85025 |
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 862 | 370 | $8 | |
80076 |
Liver function blood test panel | 858 | 370 | $8 | |
84550 |
Uric acid level, blood | 856 | 373 | $4 | |
99490 |
Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 851 | 126 | $67 | |
82550 |
Creatine kinase (cardiac enzyme) level, total | 807 | 368 | $6 |
In context: peer comparison
Among 3 peers in this city , average services per provider: 427. This provider delivers 53× the peer median.Open Payments
Industry payments received
All-time total
$87,420
Transactions
210
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Lilly USA, LLC | 75 | $50,443.69 | |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 51 | $34,283.84 | |
| Amgen Inc. | 17 | $872.84 | |
| ABBVIE INC. | 14 | $303.10 | |
| Bayer Healthcare Pharmaceuticals Inc. | 3 | $238.26 | |
| Novartis Pharmaceuticals Corporation | 12 | $210.97 | |
| CeQur Corporation | 1 | $143.26 | |
| Dexcom, Inc. | 7 | $122.31 | |
| Corcept Therapeutics | 4 | $94.09 | |
| Embecta Corp. | 5 | $92.78 | |
| Novo Nordisk Inc | 5 | $90.28 | |
| SANOFI-AVENTIS U.S. LLC | 4 | $78.41 | |
| CALLIDITAS THERAPEUTICS US INC. | 4 | $75.64 | |
| Verity Pharmaceuticals Inc. | 3 | $65.29 | |
| Travere Therapeutics, Inc. | 5 | $56.93 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,643
Patients
679
Total drug cost
$1,088,968
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 367 | 97 | $6,228 |
| Atorvastatin Calcium | Generic | 309 | 101 | $3,924 |
| Kerendia (Finerenone) | Brand | 270 | 45 | $216,144 |
| Jardiance (Empagliflozin) | Brand | 249 | 61 | $300,524 |
| Synthroid (Levothyroxine Sodium) | Brand | 238 | 69 | $27,115 |
| Mounjaro (Tirzepatide) | Brand | 225 | 31 | $296,511 |
| Metformin Hcl | Generic | 154 | 47 | $1,882 |
| Losartan Potassium | Generic | 132 | 40 | $2,501 |
| Amlodipine Besylate | Generic | 127 | 36 | $1,528 |
| Ramipril | Generic | 119 | 34 | $2,651 |
Frequently asked questions
What is Dr. Ku-Juey Raymond Chang's medical specialty?
Dr. Ku-Juey Raymond Chang practices Endocrinology, Diabetes & Metabolism Physician in Lake Forest, CA.
Where does Dr. Ku-Juey Raymond Chang practice?
Dr. Ku-Juey Raymond Chang practices at 23331 El Toro RD, Lake Forest, CA 926304891. Office phone: 9499169100.
What is Dr. Ku-Juey Raymond Chang's NPI?
Dr. Ku-Juey Raymond Chang's National Provider Identifier (NPI) is 1689611337, issued by NPPES.
Does Dr. Ku-Juey Raymond Chang accept Medicare assignment?
Yes. Dr. Ku-Juey Raymond Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ku-Juey Raymond Chang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Blood test, basic group of blood chemicals (calcium, total) (HCPCS 80048). Source: CMS Medicare Physician & Other Practitioners file.