KAREN CHU (MD) – Obstetrics & Gynecology Physician, NPI 1053436899
Obstetrics & Gynecology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
4,008 OBSTETRICS/GYNECOLOGY in CA
Provider Addresses for KAREN CHU (MD)
3838 California St Rm 412
San Francisco, CA 941181506
Phone: (415) 379-6800
Fax: (415) 379-6808
Type: Location
1 DANIEL BURNHAM CT STE 230C
SAN FRANCISCO, CA 941090460
Phone: (415) 563-9000
Fax: (415) 563-1232
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 28 Open Payments records for all available years, with a total value of $784.
Total Amount is formed as General ($784) + Research ($0) + Ownership ($0) = $784.
Last reported payment date: 2024-10-01 • Largest payer in this snapshot: Ethicon US, LLC ($223).
Total Amount
$784
General + Research + Ownership
Payments
28
Total payment records
General Amount
$784
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-01
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Ethicon US, LLC | $223 |
| Astellas Pharma US Inc | $118 |
| Amgen Inc. | $92 |
| MAYNE PHARMA COMMERCIAL LLC | $75 |
| Biogen, Inc. | $50 |
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: 2008-10-21
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 |
|---|---|---|---|---|
| I20081021000223 | I | Obstetrics/Gynecology | 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 | 35 | 18 | $0 |
| G0101 | Cervical or vaginal cancer screening; pelvic and clinical breast examination | 22 | 22 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 12 | 12 | $0 |
| Q0091 | Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | 12 | 12 | $0 |
Insurance plans in this area (ZIP 94118)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| General Surgery | CA | |
| Cardiac Electrophysiology, Internal Medicine, Nuclear Medicine, Cardiovascular Disease (Cardiology) | CA | |
| Surgical Oncology | CA | |
| Orthopedic Surgery | CA | |
| Orthopedic Surgery, Sports Medicine | CA | |
| - | CA | |
| P S Y C H I A T R Y | CA | |
| - | CA | |
| - | CA | |
| - | CA |
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