Doctor profile · Federal record
Dr. William Ko, MD
Pain Medicine (Anesthesiology) Physician (CMS: Interventional Pain Management) · Anesthesiology Physician · Fullerton, CA
- NPI 1629011762
- Accepts Medicare
- 26 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
100 E Valencia Mesa Dr, Suite 310
Fullerton, CA 928353813
(714) 446-5200
fax (714) 446-5292 - Mailing address
-
100 E Valencia Mesa Dr Ste 310
Fullerton, CA 928353800
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- November 5, 2021
- Year of graduation
- 2000 — 26 yrs since
- Specialty taxonomy
- 207LP2900X — NUCC code
- State license (1)
- California #A82916
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1629011762. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
3,271
Distinct HCPCS
10
Medicare allowed
$132,541
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J3301 |
Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 2,556 | 140 | $1 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 288 | 126 | $138 | |
62323 |
Injection of substance into lower spine canal using imaging guidance | 129 | 74 | $289 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 62 | 62 | $122 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 44 | 35 | $99 | |
64483 |
Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level | 43 | 26 | $325 | |
64484 |
Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level | 41 | 19 | $146 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 34 | 34 | $180 | |
20610 |
Aspiration and/or injection of fluid from large joint | 29 | 15 | $78 | |
27096 |
Injection of anesthetic or steroid into joint between lower spine and hip bone using imaging guidance | 24 | 15 | $260 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 297. This provider delivers 11× the peer median.Open Payments
Industry payments received
All-time total
$135
Transactions
4
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| BIOTRONIK NRO, Inc. | 1 | $42.41 | |
| Janssen Biotech, Inc. | 1 | $39.36 | |
| Averitas Pharma Inc. | 1 | $35.53 | |
| SCILEX PHARMACEUTICALS INC. | 1 | $17.83 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,207
Patients
607
Total drug cost
$51,211
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 499 | 128 | $14,994 |
| Gabapentin | Generic | 415 | 112 | $5,627 |
| Meloxicam | Generic | 193 | 62 | $638 |
| Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) | Brand | 171 | 50 | $6,514 |
| Morphine Sulfate Er (Morphine Sulfate) | Brand | 136 | 29 | $3,541 |
| Oxycodone Hcl | Generic | 127 | 42 | $3,283 |
| Baclofen | Generic | 109 | 32 | $1,798 |
| Diclofenac Sodium | Generic | 100 | 32 | $1,202 |
| Methadone Hcl | Generic | 79 | 18 | $2,012 |
| Tramadol Hcl | Generic | 77 | 24 | $439 |
Frequently asked questions
What is Dr. William Ko's medical specialty?
Dr. William Ko practices Pain Medicine (Anesthesiology) Physician in Fullerton, CA.
Where does Dr. William Ko practice?
Dr. William Ko practices at 100 E Valencia Mesa Dr, Fullerton, CA 928353813. Office phone: 7144465200.
What is Dr. William Ko's NPI?
Dr. William Ko's National Provider Identifier (NPI) is 1629011762, issued by NPPES.
Does Dr. William Ko accept Medicare assignment?
Yes. Dr. William Ko accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Ko commonly perform?
Top Medicare-reported procedures in 2023: Injection, triamcinolone acetonide, not otherwise specified, 10 mg (HCPCS J3301); Established patient office or other outpatient visit (HCPCS 99214); Injection of substance into lower spine canal using imaging guidance (HCPCS 62323). Source: CMS Medicare Physician & Other Practitioners file.