Dr. Vincent Wen Chien Kao, DO

  • Fountain Valley, CA
  • Gastroenterologist
NPI1649570268PAC ID4082859681
Medicare services, 2024
69
Medicare patients, 2024
59
Part D claims, 2024
1,087
Publications
2
Hospital affiliations
2
Practice address
18035 Brookhurst St, Fountain Valley, CA 92708
Practice phone
Call (877) 696-3622
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

Memorialcare Medical Foundation

Fountain Valley, California

See all 9 affiliations

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Dr. Vincent Wen Chien Kao is a gastroenterologist in Fountain Valley, California

Dr. Kao practices at Memorialcare Medical Foundation in Fountain Valley, California.

Dr. Kao's NPI, 1649570268, was assigned on October 29, 2010. Dr. Kao graduated from WesternU College of Osteopathic Medicine of the Pacific in 2009. Dr. Kao holds California license 20A11408.

NPI and contact details
Medicare PAC ID
4082859681
NPI enumeration date
October 29, 2010
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(877) 696-3622
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Male
Estimated age
43
Medical school graduation
2009

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

Dr. Vincent Wen Chien Kao practices at Memorialcare Medical Foundation in Fountain Valley, California

Dr. Kao's primary practice is Memorialcare Medical Foundation, at 18035 Brookhurst St, Fountain Valley, CA 92708 in Orange County. The practice phone is (877) 696-3622.

  • Memorialcare Medical Foundation
    18035 Brookhurst St, Fountain Valley, CA 92708 · Orange CountyPhone(877) 696-3622

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

Dr. Vincent Wen Chien Kao is affiliated with 5 sites of care and 4 medical groups

Dr. Kao's primary practice is Memorialcare Medical Foundation in Fountain Valley, California. Dr. Kao is also affiliated with Orange Coast Medical Center. The medical group on file is Optum - Downtown Los Angeles. Dmand AI also links Dr. Kao to 1 more hospital, 3 medical groups and 2 group practices and clinics, each named with a free account.

See all 9 affiliations for Dr. Kao

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

Dmand AI tracks the EHR system at Dr. Vincent Wen Chien Kao's practice

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

EHR by site
SiteEHR vendor and product
Memorialcare Medical FoundationAvailable with a free account
+4 more sites and 3 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Vincent Wen Chien Kao is one of 1,977 gastroenterologists in California

Gastroenterology is Dr. Kao's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Kao is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Kao is licensed in California.

Specialties and state licenses

  • Gastroenterology, CaliforniaPrimaryLicense 20A11408 · taxonomy 207RG0100X

Clinical focus

Dmand AI lists chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy, gastrointestinal bleeding, hemorrhoids and irritable bowel syndrome (IBS) among the conditions Dr. Kao treats.

Gastroenterologists near Dr. Kao

Counts of gastroenterologists 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

Dr. Vincent Wen Chien Kao billed Medicare for 69 services in 2024

CMS data shows 69 Medicare services from Dr. Kao across 4 procedure codes in 2024, for 59 Medicare patients. Medicare paid $7,023 for them.

Medicare services, 202469
Medicare patients59
Paid by Medicare$7,023
Procedure codes4

Dr. Kao's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 742024: 5822%
Surgery
2023: 242024: 1154%
Other services
2023: 122024: 0100%

Where Dr. Kao's Medicare services took place, 2024

  • In an office5884%
  • In a facility1116%

Dr. Kao compared with the California median for gastroenterologists, 2024

  • Dr. Kao
  • California median
Medicare services
69vs 58688% below
Medicare patients
59vs 30280% below
Part D claims
892vs 3802.3 times

Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.

Dr. Kao'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 Dr. Kao

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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kao and other gastroenterologists in California.

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

Dr. Vincent Wen Chien Kao treated 59 Medicare patients in 2024, average age 71

CMS counts 59 Medicare patients who saw Dr. Kao in 2024. The largest group is 65 to 74, with 34 patients. 71% of them have high blood pressure, and 69% have high cholesterol. 29% are also on Medicaid. Their average risk score is 1.35, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Kao's median patient age at 59, with 54% women.

Medicare patients, 202459
Average age71
Average risk score1.35
Also on Medicaid29%

Dr. Kao's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Kao's Medicare patients by sex, 2024

  • Women3153%
  • Men2847%

Chronic conditions among Dr. Kao's Medicare patients, 2024

  1. High blood pressure71%
  2. High cholesterol69%
  3. Arthritis46%
  4. Diabetes36%
  5. Mood disorders32%
  6. Depression31%
  7. Anxiety25%
  8. Chronic kidney disease24%

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

Dr. Kao's patients across all payers

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

Patient panel by age, all payers

Median age 59

Patient panel by sex, all payers

  • Women54%
  • Men45%

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

Dr. Vincent Wen Chien Kao wrote 1,087 Medicare Part D claims in 2024

In 2024, Dr. Kao wrote 1,087 Medicare Part D claims for 494 patients. 81% of them were for generic drugs. CMS names the drug for 892 of them, across 14 drugs with 11 or more claims each, at $321,188 in total drug cost. In 2023, CMS named 1,087 claims across 16 drugs.

Part D claims, 20241,087
Drugs named by CMS14
Total drug cost$321,188
Part D patients494

Dr. Kao's Part D claims by kind of drug, 2024

  • Generic883 claims81%
  • Brand-name204 claims19%

Dr. Kao'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.

Drug classes CMS tracks in Dr. Kao's Part D claims, 2024

  • Antibiotics2%23 of 1,087 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1,0872024: 89218%

Drugs named by CMS: 14 in 2024, 16 in 2023.

See all prescribing by Dr. Kao

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

Dr. Vincent Wen Chien Kao ranks in the 66th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare

Dr. Kao accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Kao as offering telehealth. CMS counts 58 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Kao, more than 66% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Where Dr. Kao ranks in Medicare procedure volume

Upper gastrointestinal (GI) endoscopy for acid reflux
66th percentile58 procedures
Colonoscopy
57th percentile36 procedures

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

Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)

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Dr. Vincent Wen Chien Kao has 2 publications on record

Dmand AI links 2 papers to Dr. Kao. Dr. Kao's most frequent co-author is Myron John Tong, MD.

Papers2

Dr. Kao's most frequent co-authors

Recent publications by Dr. Kao

See all 2 publications and co-authors

See who Dr. Kao researches with

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

How network discovery works

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

Dr. Vincent Wen Chien Kao received $3,301 in industry payments from 2016 to 2025

CMS Open Payments shows 110 general payments to Dr. Kao from 18 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. Abbvie Inc. paid the most, $937.

General payments to Dr. Kao by program year, 2016 to 2025

General payments to Dr. Kao by kind, 2016 to 2025

$3.3Kin total
  • Food and beverage$3,20997%
  • Education$913%

Companies that paid Dr. Kao the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Kao

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

Dr. Vincent Wen Chien Kao graduated from WesternU College of Osteopathic Medicine of the Pacific

Dr. Kao graduated from WesternU College of Osteopathic Medicine of the Pacific in 2009.

  1. Medical schoolWesternU College of Osteopathic Medicine of the Pacific
  2. Board certified in gastroenterologyAmerican Board of Internal Medicine
  3. Board certified in 2010 - 2027CA State License

Source: Dmand AI Professional Profile Data

Dr. Vincent Wen Chien Kao accepts plans from 9 insurance carriers

Dr. Kao is in network with 9 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • LA Care
  • Regence Health Plans
  • CMS Medicare
  • Humana
  • +1 more carriersWith a free account

Plan types Dr. Kao accepts, by number of carriers

  1. Medicare8
  2. PPO5
  3. HMO4
  4. POS2
  5. EPO1

Source: Dmand AI Insurance Network Data

Sources for Dr. Vincent Wen Chien Kao'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)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 Dr. Vincent Wen Chien Kao

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

What is Dr. Vincent Wen Chien Kao's NPI number?

Dr. Vincent Wen Chien Kao's NPI number is 1649570268. It was assigned on October 29, 2010, and it is active in the NPI Registry.

What kind of doctor is Dr. Vincent Wen Chien Kao?

Dr. Vincent Wen Chien Kao is a gastroenterologist in Fountain Valley, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Dr. Vincent Wen Chien Kao practice?

Dr. Kao practices at 18035 Brookhurst St, Fountain Valley, CA 92708. Dr. Kao's primary practice is Memorialcare Medical Foundation in Fountain Valley, California. Dmand AI also links Dr. Kao to 1 hospital, 3 medical groups and 2 group practices and clinics.

What is Dr. Vincent Wen Chien Kao's office phone number?

The practice phone on file for Dr. Kao is (877) 696-3622.

What is Dr. Vincent Wen Chien Kao's medical license number?

Dr. Kao holds California license 20A11408.

Which hospitals is Dr. Vincent Wen Chien Kao affiliated with?

Dr. Kao is affiliated with Orange Coast Medical Center. Dmand AI links Dr. Kao to 1 more hospital.

What medical group is Dr. Vincent Wen Chien Kao part of?

Dr. Kao is linked to Optum - Downtown Los Angeles. Dmand AI links Dr. Kao to 3 more medical groups.

Does Dr. Vincent Wen Chien Kao accept Medicare?

Yes. CMS data shows Dr. Kao billed Medicare for 69 services in 2024, and Dr. Kao accepts Medicare assignment.

Does Dr. Vincent Wen Chien Kao offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Kao as offering telehealth services.

How many Medicare patients does Dr. Vincent Wen Chien Kao see?

CMS counts 59 Medicare patients who saw Dr. Kao in 2024, with an average age of 71.

Show 9 more questionsShow fewer questions

Is Dr. Vincent Wen Chien Kao board certified?

Yes. Dr. Kao is board certified in gastroenterology by the American Board of Internal Medicine.

What services does Dr. Vincent Wen Chien Kao bill to Medicare?

In 2024, Dr. Kao's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99204) and office visit, new patient (99203).

Where did Dr. Vincent Wen Chien Kao go to medical school?

Dr. Kao graduated from WesternU College of Osteopathic Medicine of the Pacific in 2009.

What drugs does Dr. Vincent Wen Chien Kao prescribe most?

In 2024 Medicare Part D data, Dr. Kao's most prescribed drugs by claims were Sod Sulf-Potass Sulf-Mag Sulf, Omeprazole and Pantoprazole Sodium.

Has Dr. Vincent Wen Chien Kao received payments from drug or device companies?

CMS Open Payments shows $3,301 in general payments to Dr. Kao from 18 companies from 2016 to 2025. The largest total came from Abbvie Inc.

How long has Dr. Vincent Wen Chien Kao been practicing?

Dr. Kao graduated from medical school in 2009, 17 years ago.

Does Dr. Vincent Wen Chien Kao do research?

Dmand AI links 2 publications to Dr. Kao.

Who does Dr. Vincent Wen Chien Kao publish with?

Dr. Kao's most frequent co-authors are Myron John Tong, MD (2 shared papers).

What insurance does Dr. Vincent Wen Chien Kao accept?

Dr. Kao is in network with 9 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

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