Won Seok Cha

  • Bellflower, CA
  • Family medicine physician
NPI1174903140PAC ID6901184373
Medicare services, 2024
425
Medicare patients, 2024
322
Part D claims, 2024
1,151
Hospital affiliations
1
Industry payments
$17
Practice address
9400 Rosecrans Avenue, Bellflower, CA 90706
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD

Acute Care Hospital outpatient department · Bellflower, California

See all 8 affiliations

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Won Seok Cha is a family medicine physician in Bellflower, California

Won Seok Cha practices at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California.

Won Seok Cha's NPI, 1174903140, was assigned on June 4, 2015. Won Seok Cha graduated from UTMB Health in 2015. Won Seok Cha holds California license C186753.

NPI and contact details
Medicare PAC ID
6901184373
NPI enumeration date
June 4, 2015
NPI status
Active
Accepts Medicare assignment
Yes
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
37
Medical school graduation
2015

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

Won Seok Cha practices at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California

Won Seok Cha's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD, at 9400 Rosecrans Avenue, Bellflower, CA 90706.

  • Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD
    9400 Rosecrans Avenue, Bellflower, CA 90706

Source: Dmand AI Affiliation Data

Won Seok Cha is affiliated with 5 sites of care and 3 medical groups

Won Seok Cha's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California. Won Seok Cha is also affiliated with Downey Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Won Seok Cha to 2 more group practices and clinics, 2 medical groups and 1 breast imaging center, each named with a free account. Won Seok Cha's employer is on file too: a hospital.

See all 8 affiliations for Won Seok Cha

Source: Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Won Seok Cha's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Won Seok Cha practices, 5 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Kaiser Permanente Medical Group Bellflower Medical Offices - HOPDAvailable with a free account
+4 more sites and 2 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Won Seok Cha is one of 15,680 family medicine physicians in California

Family medicine is Won Seok Cha's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Won Seok Cha is board certified in family medicine by the American Board of Family Medicine. Dmand AI has Won Seok Cha's licenses on file in 4 states: California, Oregon, Washington and Illinois.

Specialties and state licenses

  • Family medicine, CaliforniaPrimaryLicense C186753 · 2023 to 2027 · taxonomy 207Q00000X
  • Oregon license2022 to 2025
  • Washington license2020 to 2025
  • Illinois license2018 to 2020

Clinical focus

Dmand AI lists acid reflux, acne, acute gastroduodenitis, acute mini-stroke (TIA), acute skin infection, adjustment disease, ankle or foot injury and arthritis among the conditions Won Seok Cha treats.

Family medicine physicians near Won Seok Cha

Counts of family medicine physicians 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

Won Seok Cha billed Medicare for 425 services in 2024

CMS data shows 425 Medicare services from Won Seok Cha across 8 procedure codes in 2024, for 322 Medicare patients. Medicare paid $21,587 for them. Every service was in an office.

Medicare services, 2024425
Medicare patients322
Paid by Medicare$21,587
Procedure codes8

Won Seok Cha's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 4612024: 36820%
Lab and pathology
2023: 362024: 4422%
Tests and treatments
2023: 772024: 1383%
Other services
2023: 352024: 0100%

Won Seok Cha compared with the California median for family medicine physicians, 2024

  • Won Seok Cha
  • California median
Medicare services
425vs 24673% above
Medicare patients
322vs 1182.7 times
Part D claims
699vs 83316% below

Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.

Won Seok Cha'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 Won Seok Cha

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

Won Seok Cha treated 322 Medicare patients in 2024, average age 75

CMS counts 322 Medicare patients who saw Won Seok Cha in 2024. The largest group is 65 to 74, with 122 patients. 70% of them have high blood pressure, and 69% have high cholesterol. 20% 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 Won Seok Cha's median patient age at 47, with 71% women.

Medicare patients, 2024322
Average age75
Average risk score1.35
Also on Medicaid20%

Won Seok Cha's Medicare patients by age, 2024

Won Seok Cha's Medicare patients by sex, 2024

  • Women23573%
  • Men8727%

Chronic conditions among Won Seok Cha's Medicare patients, 2024

  1. High blood pressure70%
  2. High cholesterol69%
  3. Arthritis53%
  4. Mood disorders28%
  5. Anxiety27%
  6. Diabetes27%
  7. Ischemic heart disease27%
  8. Depression24%

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

Won Seok Cha's patients across all payers

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

Patient panel by age, all payers

Median age 47

Patient panel by sex, all payers

  • Women71%
  • Men29%

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

Won Seok Cha wrote 1,151 Medicare Part D claims in 2024

In 2024, Won Seok Cha wrote 1,151 Medicare Part D claims for 434 patients. 86% of them were for generic drugs. CMS names the drug for 699 of them, across 33 drugs with 11 or more claims each, at $30,292 in total drug cost. In 2023, CMS named 241 claims across 12 drugs.

Part D claims, 20241,151
Drugs named by CMS33
Total drug cost$30,292
Part D patients434

Won Seok Cha's Part D claims by kind of drug, 2024

  • Generic985 claims86%
  • Brand-name152 claims13%
  • Other14 claims1%

Won Seok Cha'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 Won Seok Cha's Part D claims, 2024

  • Opioids3%30 of 1,151 claims
  • Antibiotics12%141 of 1,151 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: 2412024: 699190%

Drugs named by CMS: 33 in 2024, 12 in 2023.

See all prescribing by Won Seok Cha

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

How Won Seok Cha takes part in Medicare

Won Seok Cha accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Won Seok Cha received $17 in industry payments in 2016

CMS Open Payments shows 1 general payment to Won Seok Cha from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $17.

Companies that paid Won Seok Cha the most, 2016 to 2016

Share is of all general payments to this clinician.

See all payments to Won Seok Cha

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

Won Seok Cha graduated from UTMB Health

Won Seok Cha graduated from UTMB Health in 2015.

  1. Medical schoolUTMB Health
  2. Board certified in family medicineAmerican Board of Family Medicine

Source: Dmand AI Professional Profile Data

Won Seok Cha accepts plans from 8 insurance carriers

Won Seok Cha is in network with 8 carriers, including Elevance, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.

  • Elevance
  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • Kaiser Permanente
  • HCSC
  • Regence Health Plans
  • Blue Cross and Blue Shield of Kansas City
  • CMS Medicare

Plan types Won Seok Cha accepts, by number of carriers

  1. Medicare6
  2. PPO5
  3. HMO4
  4. POS4
  5. EPO3

Source: Dmand AI Insurance Network Data

Sources for Won Seok Cha'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 phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand 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)
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 Won Seok Cha

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

What is Won Seok Cha's NPI number?

Won Seok Cha's NPI number is 1174903140. It was assigned on June 4, 2015, and it is active in the NPI Registry.

What does Won Seok Cha specialize in?

Won Seok Cha is a family medicine physician in Bellflower, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).

Where does Won Seok Cha practice?

Won Seok Cha practices at 9400 Rosecrans Avenue, Bellflower, CA 90706. Won Seok Cha's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California. Dmand AI also links Won Seok Cha to 2 group practices and clinics, 2 medical groups and 1 breast imaging center.

What is Won Seok Cha's medical license number?

Won Seok Cha holds California license C186753, one of the licenses on file in 4 states.

Which states has Won Seok Cha been licensed in?

Dmand AI has state licenses on file for Won Seok Cha in California (2023 to 2027), Oregon (2022 to 2025), Washington (2020 to 2025) and Illinois (2018 to 2020).

Which hospitals is Won Seok Cha affiliated with?

Won Seok Cha is affiliated with Downey Medical Center.

What medical group is Won Seok Cha part of?

Won Seok Cha is linked to Southern California Permanente Medical Group. Dmand AI links Won Seok Cha to 2 more medical groups.

Does Won Seok Cha accept Medicare?

Yes. CMS data shows Won Seok Cha billed Medicare for 425 services in 2024, and Won Seok Cha accepts Medicare assignment.

How many Medicare patients does Won Seok Cha see?

CMS counts 322 Medicare patients who saw Won Seok Cha in 2024, with an average age of 75.

Is Won Seok Cha board certified?

Yes. Won Seok Cha is board certified in family medicine by the American Board of Family Medicine.

Show 6 more questionsShow fewer questions

What services does Won Seok Cha bill to Medicare?

In 2024, Won Seok Cha's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and lab and pathology test (81003).

Where did Won Seok Cha go to medical school?

Won Seok Cha graduated from UTMB Health in 2015.

What drugs does Won Seok Cha prescribe most?

In 2024 Medicare Part D data, Won Seok Cha's most prescribed drugs by claims were Losartan Potassium, Amlodipine Besylate and Atorvastatin Calcium.

Has Won Seok Cha received payments from drug or device companies?

CMS Open Payments shows $17 in general payments to Won Seok Cha from 1 company from 2016 to 2016. The largest total came from Merck Sharp & Dohme Corporation.

How long has Won Seok Cha been practicing?

Won Seok Cha graduated from medical school in 2015, 11 years ago.

What insurance does Won Seok Cha accept?

Won Seok Cha is in network with 8 carriers, including Elevance, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.

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