Doctor profile · Federal record
Dr. Ian Chang, D.O.
Rheumatology Physician · Internal Medicine Physician · Orange, CA
- NPI 1407116411
- MIPS 91.2 / 100 · 2023
- 14 yrs on file
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
101 the City Dr S Bldg 30
Orange, CA 928683201
(714) 456-7720 - Additional location
-
804 Service Road, Room A225 Msu Clinical Center
East Lansing, MI 48824
(517) 353-4941
fax (517) 432-3145 - Mailing address
-
200 S Manchester Ave Ste 300
Orange, CA 928683219
Credentials & registration
- NPI registered
- May 2012 — 14 yrs on file
- Profile last updated
- March 29, 2023
- Specialty taxonomy
- 207RR0500X — NUCC code
- State licenses (2)
- California #20A16850 · Michigan #5101019682
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1407116411. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
286
Distinct HCPCS
7
Medicare allowed
$41,628
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 97 | 60 | $154 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 74 | 43 | $154 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 29 | 26 | $105 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 28 | 28 | $188 | |
99443 |
Telephone medical discussion with physician, 21-30 minutes | 28 | 20 | $101 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 18 | 16 | $105 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 12 | 12 | $194 |
In context: peer comparison
Among 6 peers in Orange Rheumatology Physician, average services per provider: 73. This provider delivers 3.9× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
357
Patients
94
Total drug cost
$355,623
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Diclofenac Sodium | Generic | 65 | 30 | $1,767 |
| Prednisone | Generic | 48 | 20 | $495 |
| Hydroxychloroquine Sulfate | Generic | 46 | 15 | $2,051 |
| Methotrexate (Methotrexate Sodium) | Brand | 42 | 16 | $1,839 |
| Humira(Cf) Pen (Adalimumab) | Brand | 29 | 0 | $211,442 |
| Gabapentin | Generic | 26 | 0 | $944 |
| Omeprazole | Generic | 25 | 13 | $342 |
| Enbrel Sureclick (Etanercept) | Brand | 17 | 0 | $129,430 |
| Leflunomide | Generic | 16 | 0 | $527 |
| Alendronate Sodium | Generic | 15 | 0 | $189 |
Frequently asked questions
What is Dr. Ian Chang's medical specialty?
Dr. Ian Chang practices Rheumatology Physician in Orange, CA.
Where does Dr. Ian Chang practice?
Dr. Ian Chang practices at 101 the City Dr S Bldg 30, Orange, CA 928683201. Office phone: 7144567720.
What is Dr. Ian Chang's NPI?
Dr. Ian Chang's National Provider Identifier (NPI) is 1407116411, issued by NPPES.
What procedures does Dr. Ian Chang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); Established patient office or other outpatient visit (HCPCS 99215); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.