DR. JOHNNY TZER-REN CHANG (MD) – Plastic Surgery Physician, NPI 1417175258
Plastic Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
803 PLASTIC AND RECONSTRUCTIVE SURGERY in CA
Provider Addresses for DR. JOHNNY TZER-REN CHANG (MD)
325 DISTEL CIR
LOS ALTOS, CA 940221408
Phone: (650) 853-2916
Type: Mailing
795 EL CAMINO REAL
LEE BUILDING, LEVEL 3
PALO ALTO, CA 943012302
Phone: (650) 853-2916
Fax: (650) 853-2852
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $108.
Total Amount is formed as General ($108) + Research ($0) + Ownership ($0) = $108.
Last reported payment date: 2024-05-22 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($108).
Total Amount
$108
General + Research + Ownership
Payments
1
Total payment records
General Amount
$108
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-05-22
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $108 |
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: 2012-09-07
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 |
|---|---|---|---|---|
| I20120907000654 | I | Plastic And Reconstructive Surgery | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 27 | 14 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 12 | 12 | $0 |
Insurance plans in this area (ZIP 94022)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| PLASTIC AND RECONSTRUCTIVE SURGERY | CA | 13132 | Repair of wound (2.6 to 7.5 centimeters) of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, and/or feet | 19 | 18 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| D E R M A T O L O G Y | CA | |
| A L L E R G Y/ I M M U N O L O G Y | CA | |
| - | CA | |
| Hospitalist, Obstetrics/Gynecology | CA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | OR | |
| - | CA | |
| - | CA | |
| - | CA | |
| - | CA | |
| A N E S T H E S I O L O G Y | CA |
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