Dr. Ken Duong Nguyen, MD

  • San Diego, CA
  • Gastroenterologist
NPI1205193828PAC ID2062644487
Medicare services, 2024
951
Medicare patients, 2024
431
Part D claims, 2024
1,909
Publications
2
Hospital affiliations
1
Practice address
3445 Pacific Coast Highway, Suite 110, Torrance, CA 90505
Practice phone
Call (310) 325-8054
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

Coast Surgery Center of South Bay

Surgery Center - Medicare-Certified · Torrance, California

See all 6 affiliations

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Dr. Ken Duong Nguyen is a gastroenterologist in San Diego, California

Dr. Nguyen practices at Coast Surgery Center of South Bay in Torrance, California.

Dr. Nguyen's NPI, 1205193828, was assigned on April 20, 2012. Dr. Nguyen graduated from Boston University School Of Medicine in 2012. Dr. Nguyen's California license number on file is A127222.

NPI and contact details
Medicare PAC ID
2062644487
NPI enumeration date
April 20, 2012
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(310) 325-8054
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
40
Medical school graduation
2012

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

Dr. Ken Duong Nguyen practices in Torrance and San Diego

Dr. Nguyen's primary practice is Coast Surgery Center of South Bay, at 3445 Pacific Coast Highway, Suite 110, Torrance, CA 90505. The practice phone is (310) 325-8054. Dr. Nguyen also practices at Coast Surgery Center, 3444 Kearny Villa Rd, San Diego, CA 92123.

  • Coast Surgery Center of South BayPrimary
    3445 Pacific Coast Highway, Suite 110, Torrance, CA 90505Phone(310) 325-8054
  • Coast Surgery Center
    3444 Kearny Villa Rd, San Diego, CA 92123 · San Diego CountyPhone(858) 268-3566

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

Dr. Ken Duong Nguyen is affiliated with 4 sites of care and 2 medical groups

Dr. Nguyen's primary practice is Coast Surgery Center of South Bay in Torrance, California. Dr. Nguyen is also affiliated with USC Arcadia Hospital. The medical group on file is Unio Specialty Care, Urology, Encinitas (formerly Genesis Healthcare Partners). Dmand AI also links Dr. Nguyen to 1 more group practice or clinic, 1 ambulatory surgery center and 1 medical group, each named with a free account.

See all 6 affiliations for Dr. Nguyen

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Ken Duong Nguyen's practice

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

EHR by site
SiteEHR vendor and product
Coast Surgery Center of South BayAvailable with a free account
+3 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dr. Ken Duong Nguyen is one of 1,977 gastroenterologists in California

Gastroenterology is Dr. Nguyen's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Nguyen is board certified in gastroenterology by the American Board of Internal Medicine. Dmand AI has Dr. Nguyen's licenses on file in 3 states: California, Arizona and Texas.

Specialties and state licenses

  • Gastroenterology, CaliforniaPrimaryLicense A127222 · 2013 to 2025 · taxonomy 207RG0100X
  • Arizona license2018 to 2021
  • Texas license2015 to 2020

Clinical focus

Dmand AI lists acid reflux, acute gallbladder or bile duct inflammation, acute gastroduodenitis, chronic indigestion, chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy and fatty liver among the conditions Dr. Nguyen treats.

Gastroenterologists near Dr. Nguyen

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. Ken Duong Nguyen billed Medicare for 951 services in 2024

CMS data shows 951 Medicare services from Dr. Nguyen across 19 procedure codes in 2024, for 431 Medicare patients. Medicare paid $101,425 for them.

Medicare services, 2024951
Medicare patients431
Paid by Medicare$101,425
Procedure codes19

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

  • 2023
  • 2024
Office and hospital visits
2023: 8092024: 57928%
Surgery
2023: 3412024: 25924%
Other services
2023: 362024: 6067%
Imaging
2023: 452024: 5318%
Tests and treatments
2023: 222024: 0100%

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

  • In an office62466%
  • In a facility32734%

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

  • Dr. Nguyen
  • California median
Medicare services
951vs 58662% above
Medicare patients
431vs 30243% above
Part D claims
1,687vs 3804.4 times

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

Dr. Nguyen'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. Nguyen

Need commercial claims for Dr. Nguyen?

Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nguyen 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. Ken Duong Nguyen treated 431 Medicare patients in 2024, average age 73

CMS counts 431 Medicare patients who saw Dr. Nguyen in 2024. The largest group is 65 to 74, with 222 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 76% are also on Medicaid. Their average risk score is 1.53, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Nguyen's median patient age at 62, with 53% women.

Medicare patients, 2024431
Average age73
Average risk score1.53
Also on Medicaid76%

Dr. Nguyen's Medicare patients by age, 2024

Dr. Nguyen's Medicare patients by sex, 2024

  • Women24958%
  • Men18242%

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

  1. High blood pressure75%
  2. High cholesterol75%
  3. Diabetes50%
  4. Arthritis45%
  5. Chronic kidney disease39%
  6. Ischemic heart disease32%
  7. Osteoporosis31%
  8. COPD22%

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

Dr. Nguyen's patients across all payers

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

Patient panel by age, all payers

Median age 62

Patient panel by sex, all payers

  • Women53%
  • Men46%

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

Dr. Ken Duong Nguyen wrote 1,909 Medicare Part D claims in 2024

In 2024, Dr. Nguyen wrote 1,909 Medicare Part D claims for 542 patients. 65% of them were for generic drugs. CMS names the drug for 1,687 of them, across 31 drugs with 11 or more claims each, at $905,150 in total drug cost. In 2023, CMS named 1,619 claims across 32 drugs.

Part D claims, 20241,909
Drugs named by CMS31
Total drug cost$905,150
Part D patients542

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

  • Generic1,250 claims65%
  • Brand-name and other659 claims35%

Dr. Nguyen'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. Nguyen's Part D claims, 2024

  • Antibiotics4%76 of 1,909 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: 1,6192024: 1,6874%

Drugs named by CMS: 31 in 2024, 32 in 2023.

See all prescribing by Dr. Nguyen

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. Ken Duong Nguyen ranks in the 89th percentile for colonoscopy in Medicare

Dr. Nguyen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Nguyen as offering telehealth. CMS counts 151 procedures of colonoscopy by Dr. Nguyen, more than 89% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Where Dr. Nguyen ranks in Medicare procedure volume

Colonoscopy
89th percentile151 procedures
Upper gastrointestinal (GI) endoscopy for acid reflux
80th percentile117 procedures

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

Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)

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

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Dr. Ken Duong Nguyen has 2 publications on record

Dmand AI links 2 papers to Dr. Nguyen in 2014. Dr. Nguyen's most frequent co-author is Gobind Nath Sharma, MD.

Papers2

Dr. Nguyen's most frequent co-authors

Recent publications by Dr. Nguyen

See all 2 publications and co-authors

See who Dr. Nguyen researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Nguyen 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. Ken Duong Nguyen received $193,196 in industry payments from 2016 to 2025

CMS Open Payments shows 954 general payments to Dr. Nguyen from 39 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 81% of the total. Abbvie Inc. paid the most, $122,761.

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

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

$193.2Kin total
  • Speaker and faculty fees$157,24581%
  • Food and beverage$25,84313%
  • Consulting fees$8,0254%
  • Travel and lodging$1,9881%
  • Education$950%

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

Share is of all general payments to this clinician.

See all payments to Dr. Nguyen

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

Dr. Ken Duong Nguyen graduated from Boston University School Of Medicine

Dr. Nguyen graduated from Boston University School Of Medicine in 2012. Dr. Nguyen is a member of ACG, AGA and ASGE.

  1. Medical schoolBoston University School Of Medicine
  2. Board certified in gastroenterologyAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Ken Duong Nguyen accepts plans from 17 insurance carriers

Dr. Nguyen is in network with 17 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 11. Check the plan with the practice before a visit.

Plan types Dr. Nguyen accepts, by number of carriers

  1. Medicare11
  2. PPO10
  3. HMO9
  4. EPO4
  5. POS3
  6. Medicaid2

Source: Dmand AI Insurance Network Data

Sources for Dr. Ken Duong Nguyen'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 Affiliation DataDmand AI Practice Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy 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. Ken Duong Nguyen

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. Ken Duong Nguyen's NPI number?

Dr. Ken Duong Nguyen's NPI number is 1205193828. It was assigned on April 20, 2012, and it is active in the NPI Registry.

What kind of doctor is Dr. Ken Duong Nguyen?

Dr. Ken Duong Nguyen is a gastroenterologist in San Diego, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Dr. Ken Duong Nguyen practice?

Dr. Nguyen practices at 3445 Pacific Coast Highway, Suite 110, Torrance, CA 90505. Dr. Nguyen also practices at 3444 Kearny Villa Rd, San Diego, CA 92123. Dr. Nguyen's primary practice is Coast Surgery Center of South Bay in Torrance, California. Dmand AI also links Dr. Nguyen to 1 group practice or clinic, 1 ambulatory surgery center and 1 medical group.

What is Dr. Ken Duong Nguyen's office phone number?

The practice phone on file for Dr. Nguyen is (310) 325-8054.

What is Dr. Ken Duong Nguyen's medical license number?

Dr. Nguyen's California license number on file is A127222, one of the licenses on file in 3 states.

Which states has Dr. Ken Duong Nguyen been licensed in?

Dmand AI has state licenses on file for Dr. Nguyen in California (2013 to 2025), Arizona (2018 to 2021) and Texas (2015 to 2020).

Which hospitals is Dr. Ken Duong Nguyen affiliated with?

Dr. Nguyen is affiliated with USC Arcadia Hospital.

What medical group is Dr. Ken Duong Nguyen part of?

Dr. Nguyen is linked to Unio Specialty Care, Urology, Encinitas (formerly Genesis Healthcare Partners). Dmand AI links Dr. Nguyen to 1 more medical group.

Does Dr. Ken Duong Nguyen accept Medicare?

Yes. CMS data shows Dr. Nguyen billed Medicare for 951 services in 2024, and Dr. Nguyen accepts Medicare assignment.

Does Dr. Ken Duong Nguyen offer telehealth?

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

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. Ken Duong Nguyen see?

CMS counts 431 Medicare patients who saw Dr. Nguyen in 2024, with an average age of 73.

Is Dr. Ken Duong Nguyen board certified?

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

What services does Dr. Ken Duong Nguyen bill to Medicare?

In 2024, Dr. Nguyen's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99204) and surgery: digestive system (43239).

Where did Dr. Ken Duong Nguyen go to medical school?

Dr. Nguyen graduated from Boston University School Of Medicine in 2012.

What drugs does Dr. Ken Duong Nguyen prescribe most?

In 2024 Medicare Part D data, Dr. Nguyen's most prescribed drugs by claims were Pantoprazole Sodium, Gavilyte-G and Omeprazole.

Has Dr. Ken Duong Nguyen received payments from drug or device companies?

CMS Open Payments shows $193,196 in general payments to Dr. Nguyen from 39 companies from 2016 to 2025. The largest total came from Abbvie Inc.

How long has Dr. Ken Duong Nguyen been practicing?

Dr. Nguyen graduated from medical school in 2012, 14 years ago.

Does Dr. Ken Duong Nguyen do research?

Dmand AI links 2 publications to Dr. Nguyen.

Who does Dr. Ken Duong Nguyen publish with?

Dr. Nguyen's most frequent co-authors are Gobind Nath Sharma, MD (1 shared paper).

What insurance does Dr. Ken Duong Nguyen accept?

Dr. Nguyen is in network with 17 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 11. Check the plan with the practice before a visit.

Selling to gastroenterology practices?

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