DR. STEPHEN CHANG (MD) – Family Medicine Physician, NPI 1043715410
Family Medicine Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
13,194 FAMILY PRACTICE in CA
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Provider Addresses for DR. STEPHEN CHANG (MD)
800, North Main Street, French Park, Santa Ana, Orange County, California, 92701, United States
SANTA ANA, CA 927013576
Phone:
Type: Mailing
The City Drive South, Orange, Orange County, California, 92868, United States
ORANGE, CA 928683201
Phone: (714) 456-5530
Type: Location
101 The City Dr S Ste 835
Orange, CA 928683201
Phone: (714) 456-5530
Type: Location
200 S MANCHESTER AVE STE 300
ORANGE, CA 928683219
Phone: (714) 456-2986
Type: Mailing
1451 IRVINE BLVD
TUSTIN, CA 927803804
Phone: (714) 838-8878
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2021-08-13
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20210813000162 | I | Family Practice | CA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 355 | 172 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 106 | 98 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 31 | 24 | $0 |
| G0008 | Administration of influenza virus vaccine | 26 | 25 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 24 | 24 | $0 |
Insurance plans in this area (ZIP 92701)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Orthopedic Surgery | CA | |
| Family Practice | CA | |
| Family Practice | CA | |
| Gastroenterology, Internal Medicine | CA | |
| Family Practice | CA | |
| Family Practice | CA | |
| Family Practice | CA | |
| Internal Medicine | CA | |
| Critical Care (Intensivists), Pulmonary Disease | CA | |
| Family Practice | CA |
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