Karen Woo

  • Los Angeles, CA
  • Vascular surgeon
NPI1285889923PAC ID9830245521
Medicare services, 2024
1,110
Medicare patients, 2024
556
Part D claims, 2024
40
Publications
7
MIPS score, 2024
97
Practice address
200 Medical Plz, Los Angeles, CA 90024
Practice phone
Call (310) 794-9206
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Peter Morton UCLA Medical Building

Los Angeles, California

See all 7 affiliations

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Karen Woo is a vascular surgeon in Los Angeles, California

Karen Woo practices at Peter Morton UCLA Medical Building in Los Angeles, California.

Karen Woo's NPI, 1285889923, was assigned on November 21, 2008. Karen Woo graduated from Joe R. & Teresa Lozano Long School of Medicine in 2001. Karen Woo holds California license A81758.

NPI and contact details
Medicare PAC ID
9830245521
NPI enumeration date
November 21, 2008
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(310) 794-9206
Professional email
Get email
Personal email
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Mobile number
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Sex
Female
Estimated age
51
Medical school graduation
2001

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Karen Woo practices at Peter Morton UCLA Medical Building in Los Angeles, California

Karen Woo's primary practice is Peter Morton UCLA Medical Building, at 200 Medical Plz, Los Angeles, CA 90024 in Los Angeles County. The practice phone is (310) 794-9206.

  • Peter Morton UCLA Medical Building
    200 Medical Plz, Los Angeles, CA 90024 · Los Angeles CountyPhone(310) 794-9206

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Karen Woo is affiliated with 5 sites of care and 2 medical groups

Karen Woo's primary practice is Peter Morton UCLA Medical Building in Los Angeles, California. Karen Woo is also affiliated with Ronald Reagan UCLA Medical Center. The medical group on file is Harbor-UCLA Medical Center. Dmand AI also links Karen Woo to 1 more hospital, 1 group practice or clinic, 1 home health agency and 1 medical group, each named with a free account.

See all 7 affiliations for Karen Woo

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Karen Woo's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Karen Woo practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Peter Morton UCLA Medical BuildingAvailable with a free account
+4 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Karen Woo is one of 532 vascular surgeons in California

Vascular surgery is Karen Woo's primary specialty in the NPI Registry, under taxonomy code 2086S0129X. Karen Woo is board certified in vascular surgery by the American Board of Surgery. Karen Woo is licensed in California.

Specialties and state licenses

  • Vascular surgery, CaliforniaPrimaryLicense A81758 · 2003 to 2026 · taxonomy 2086S0129X

Clinical focus

Dmand AI lists arterial blot clot /embolism, blood vessel access for dialysis, chronic skin ulcer, leg revascularization, peripheral vascular disease, varicose veins and varicose vein treatment among the conditions Karen Woo treats.

Vascular surgeons near Karen Woo

Counts of vascular surgeons with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Karen Woo billed Medicare for 1,110 services in 2024

CMS data shows 1,110 Medicare services from Karen Woo across 16 procedure codes in 2024, for 556 Medicare patients. Medicare paid $109,635 for them.

Medicare services, 20241,110
Medicare patients556
Paid by Medicare$109,635
Procedure codes16

Karen Woo's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Tests and treatments
2023: 5022024: 5102%
Surgery
2023: 2432024: 30325%
Office and hospital visits
2023: 3362024: 29712%

Where Karen Woo's Medicare services took place, 2024

  • In an office61355%
  • In a facility49745%

Karen Woo compared with the California median for vascular surgeons, 2024

  • Karen Woo
  • California median
Medicare services
1,110vs 60982% above
Medicare patients
556vs 2722.0 times
Part D claims
12vs 5578% below

Medians across 499 vascular surgeons in California with Dmand AI profiles that report each measure.

Karen Woo's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Karen Woo

Need commercial claims for Karen Woo?

Medicare shows one payer. Book a meeting to get commercial claims data for Karen Woo and other vascular surgeons in California.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Karen Woo treated 556 Medicare patients in 2024, average age 75

CMS counts 556 Medicare patients who saw Karen Woo in 2024. The largest group is 75 to 84, with 223 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 33% are also on Medicaid. Their average risk score is 3.13, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Karen Woo's median patient age at 66, with 41% women.

Medicare patients, 2024556
Average age75
Average risk score3.13
Also on Medicaid33%

Karen Woo's Medicare patients by age, 2024

Karen Woo's Medicare patients by sex, 2024

  • Women26948%
  • Men28752%

Chronic conditions among Karen Woo's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis60%
  4. Ischemic heart disease49%
  5. Diabetes47%
  6. Chronic kidney disease42%
  7. Heart failure33%
  8. Mood disorders29%

Share of Medicare patients with each condition. A patient can have several.

Karen Woo's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 66

Patient panel by sex, all payers

  • Women41%
  • Men58%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Karen Woo wrote 40 Medicare Part D claims in 2024

In 2024, Karen Woo wrote 40 Medicare Part D claims for 24 patients. 63% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $5,673 in total drug cost.

Part D claims, 202440
Drugs named by CMS1
Total drug cost$5,673
Part D patients24

Karen Woo's Part D claims by kind of drug, 2024

  • Generic25 claims63%
  • Brand-name15 claims38%

Karen Woo's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

See all prescribing by Karen Woo

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Karen Woo scored 97 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Karen Woo for performance year 2024, reported as part of a group. Karen Woo accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Karen Woo as offering telehealth. CMS counts 238 procedures of removal of tissue by Karen Woo, more than 93% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Karen Woo's MIPS scores, performance year 2024

  • 97of 100Final score
  • 83.8of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 73of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Where Karen Woo ranks in Medicare procedure volume

Removal of tissue
93rd percentile238 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Leg revascularization (restoring blood flow): 1 to 10 procedures (CMS shows small counts as a range)

Varicose vein removal: 1 to 10 procedures (CMS shows small counts as a range)

Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)

For MedTech and pharma teams

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Karen Woo has 7 publications on record

Dmand AI links 7 papers to Karen Woo in 2015. Karen Woo's most frequent co-authors are Carlos Fares Bechara, MD, Jean Bismuth, MD and Marlene Grenon, MD.

Papers7

Karen Woo's most frequent co-authors

Recent publications by Karen Woo

See all 7 publications and co-authors

See who Karen Woo researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Karen Woo works with, so you can find a warm path to the right vascular surgeons.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Karen Woo received $4,870 in industry payments from 2016 to 2025

CMS Open Payments shows 42 general payments to Karen Woo from 12 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 54% of the total. Laminate Medical Technologies inc. paid the most, $2,250.

General payments to Karen Woo by program year, 2016 to 2025

General payments to Karen Woo by kind, 2016 to 2025

$4.9Kin total
  • Food and beverage$2,62054%
  • Consulting fees$2,25046%

Companies that paid Karen Woo the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Karen Woo

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Karen Woo graduated from Joe R. & Teresa Lozano Long School of Medicine

Karen Woo graduated from Joe R. & Teresa Lozano Long School of Medicine in 2001.

  1. Medical schoolJoe R. & Teresa Lozano Long School of Medicine
  2. Board certified in vascular surgeryAmerican Board of Surgery

Source: Dmand AI Professional Profile Data

Karen Woo accepts plans from 14 insurance carriers

Karen Woo is in network with 14 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Elevance. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.

  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • Elevance
  • HCSC
  • Aetna
  • Blue Cross Blue Shield of Massachusetts
  • Regence Health Plans
  • Alliant Health Plans
  • +6 more carriersWith a free account

Plan types Karen Woo accepts, by number of carriers

  1. PPO9
  2. HMO7
  3. Medicare6
  4. EPO3
  5. POS2

Source: Dmand AI Insurance Network Data

Sources for Karen Woo's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Karen Woo

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Karen Woo's NPI number?

Karen Woo's NPI number is 1285889923. It was assigned on November 21, 2008, and it is active in the NPI Registry.

What does Karen Woo specialize in?

Karen Woo is a vascular surgeon in Los Angeles, California. The primary specialty in the NPI Registry is Vascular Surgery Physician (taxonomy code 2086S0129X).

Where does Karen Woo practice?

Karen Woo practices at 200 Medical Plz, Los Angeles, CA 90024. Karen Woo's primary practice is Peter Morton UCLA Medical Building in Los Angeles, California. Dmand AI also links Karen Woo to 1 hospital, 1 group practice or clinic, 1 home health agency and 1 medical group.

What is Karen Woo's office phone number?

The practice phone on file for Karen Woo is (310) 794-9206.

What is Karen Woo's medical license number?

Karen Woo holds California license A81758.

Which hospitals is Karen Woo affiliated with?

Karen Woo is affiliated with Ronald Reagan UCLA Medical Center. Dmand AI links Karen Woo to 1 more hospital.

What medical group is Karen Woo part of?

Karen Woo is linked to Harbor-UCLA Medical Center. Dmand AI links Karen Woo to 1 more medical group.

Does Karen Woo accept Medicare?

Yes. CMS data shows Karen Woo billed Medicare for 1,110 services in 2024, and Karen Woo accepts Medicare assignment.

Does Karen Woo offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Karen Woo as offering telehealth services.

What is Karen Woo's MIPS score?

Karen Woo's MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.

Show 10 more questionsShow fewer questions

How many Medicare patients does Karen Woo see?

CMS counts 556 Medicare patients who saw Karen Woo in 2024, with an average age of 75.

Is Karen Woo board certified?

Yes. Karen Woo is board certified in vascular surgery by the American Board of Surgery.

What services does Karen Woo bill to Medicare?

In 2024, Karen Woo's most billed Medicare services were office visit, established patient (99214), surgery: skin and soft tissue (11045) and surgery: skin and soft tissue (11042).

Where did Karen Woo go to medical school?

Karen Woo graduated from Joe R. & Teresa Lozano Long School of Medicine in 2001.

What drugs does Karen Woo prescribe most?

In 2024 Medicare Part D data, Karen Woo's most prescribed drugs by claims were Santyl.

Has Karen Woo received payments from drug or device companies?

CMS Open Payments shows $4,870 in general payments to Karen Woo from 12 companies from 2016 to 2025. The largest total came from Laminate Medical Technologies inc.

How long has Karen Woo been practicing?

Karen Woo graduated from medical school in 2001, 25 years ago.

Does Karen Woo do research?

Dmand AI links 7 publications to Karen Woo.

Who does Karen Woo publish with?

Karen Woo's most frequent co-authors are Carlos Fares Bechara, MD (1 shared paper), Jean Bismuth, MD (1 shared paper) and Marlene Grenon, MD (1 shared paper).

What insurance does Karen Woo accept?

Karen Woo is in network with 14 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Elevance. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.

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