Karen Woo
NPI 1285889923 · Vascular Surgery Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Vascular Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Woo is a Vascular Surgery Physician provider in Los Angeles, CA (NPI 1285889923).
Provider details
- NPI number
- 1285889923
- Entity type
- Individual
- Primary specialty
- Vascular Surgery PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- A81758 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,110 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Removal of Skin and Tissue, Each Additional 20.0 Sq Cm Or Less11045 | 166 | $27 |
| Removal of Skin and Tissue, 20.0 Sq Cm Or Less11042 | 137 | $67 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 127 | $106 |
| Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970 | 108 | $221 |
| Ultrasound of Both Sides of Head and Neck Blood Flow93880 | 91 | $223 |
| Ultrasound Study of Arm and Leg Arteries93922 | 91 | $84 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Collagenase Clostridium Hist.brand: Santyl | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$583 across 8 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-11-21
- Last updated
- 2019-12-20
- Certified
- 2019-12-20
Frequently asked questions
- What is Karen Woo's NPI number?
- Karen Woo's National Provider Identifier (NPI) is 1285889923, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Woo's specialty?
- Karen Woo is listed in the NPPES registry with a primary specialty of Vascular Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Woo located?
- Karen Woo's practice location on file with NPPES is 200 Ucla Medical Plz Ste 526, Los Angeles, CA 90095-5310.
- What is Karen Woo's phone number?
- The practice phone number listed in the NPPES registry for Karen Woo is (310) 206-6294.
- Does Karen Woo accept Medicare?
- Karen Woo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Woo's NPI active?
- Yes — Karen Woo's NPI (1285889923) is active in the NPPES registry as of the last update on 2019-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.