ANDREW TA-CHUNG LIU (M.D.) – Obstetrics & Gynecology Physician, NPI 1700835162
Obstetrics & Gynecology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
4,008 OBSTETRICS/GYNECOLOGY in CA
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Provider Addresses for ANDREW TA-CHUNG LIU (M.D.)
2900 WHIPPLE AVE STE 135
REDWOOD CITY, CA 940622844
Phone: (650) 366-5594
Fax: (650) 366-6352
Type: Mailing
2900, Whipple Avenue, Redwood City, San Mateo County, California, 94070, United States
#135
REDWOOD CITY, CA 940622843
Phone: (650) 366-5594
Fax: (650) 366-6352
Type: Location
1804 Embarcadero Road, Embarcadero Road, Palo Alto, Santa Clara County, California, 94303-3221, United States
STE 100
PALO ALTO, CA 943033341
Phone: (650) 366-5594
Fax: (650) 366-6352
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 5 Open Payments records for all available years, with a total value of $185.
Total Amount is formed as General ($185) + Research ($0) + Ownership ($0) = $185.
Last reported payment date: 2024-12-05 • Largest payer in this snapshot: Abbott Laboratories ($133).
Total Amount
$185
General + Research + Ownership
Payments
5
Total payment records
General Amount
$185
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-05
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Abbott Laboratories | $133 |
| Becton, Dickinson and Company | $20 |
| Organon LLC | $16 |
| Mallinckrodt Hospital Products Inc. | $16 |
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: 2006-05-04
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 |
|---|---|---|---|---|
| I20060504001006 | 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 |
|---|---|---|---|---|
| G0101 | Cervical or vaginal cancer screening; pelvic and clinical breast examination | 66 | 66 | $0 |
| Q0091 | Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | 47 | 47 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 41 | 33 | $0 |
Insurance plans in this area (ZIP 94062)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CA | |
| - | CA | |
| - | CA | |
| - | CA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | MA | |
| - | CA | |
| - | CA | |
| Clinical Psychologist | CA | |
| Diagnostic Radiology | CO | |
| - | CA |
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