Dr. Sako Chen, MD
- Medicare patients, 2024
- 14
- Part D claims, 2024
- 1,214
- Industry payments
- $52
- Affiliated sites
- 3
- Medical group
- 1
- Practice address
- 9400 Rosecrans Avenue, Bellflower, CA 90706
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD
Acute Care Hospital outpatient department · Bellflower, California
Find Dr. Chen's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Sako Chen is an endocrinologist in Bellflower, California
Dr. Chen practices at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California.
Dr. Chen's NPI, 1346350105, was assigned on August 30, 2006. Dr. Chen graduated from Cleveland Medical College, Homeopathic in 1999. Dr. Chen holds California license A74977.
- NPI
- 1346350105NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537119672
- NPI enumeration date
- August 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Sako Chen practices at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California
Dr. Chen'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 - HOPD9400 Rosecrans Avenue, Bellflower, CA 90706
Source: Dmand AI Affiliation Data
Dr. Sako Chen is affiliated with 3 sites of care and 1 medical group
Dr. Chen's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Chen to 1 more breast imaging center and 1 group practice or clinic, each named with a free account. Dr. Chen's employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Sako Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Sako Chen is one of 1,062 endocrinologists in California
Endocrinology, diabetes and metabolism is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207RE0101X. Dr. Chen is board certified in endocrinology, diabetes and metabolism by the American Board of Internal Medicine. Dr. Chen is licensed in California.
Specialties and state licenses
- Endocrinology, diabetes and metabolism, CaliforniaPrimary
Clinical focus
Dmand AI lists enlarged thyroid, overactive thyroid and parathyroid gland disorder among the conditions Dr. Chen treats.
Endocrinologists near Dr. Chen
Counts of endocrinologists 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. Sako Chen treated 14 Medicare patients in 2024, average age 61
CMS counts 14 Medicare patients who saw Dr. Chen in 2024. The largest group is 85 and over, with 0 patients. Their average risk score is 1.19, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 55, with 77% women.
Dr. Chen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women77%
- Men22%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Sako Chen wrote 1,214 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 1,214 Medicare Part D claims for 315 patients. 88% of them were for generic drugs. CMS names the drug for 1,080 of them, across 18 drugs with 11 or more claims each, at $46,094 in total drug cost. In 2023, CMS named 1,051 claims across 16 drugs.
Dr. Chen's Part D claims by kind of drug, 2024
- Generic1,067 claims88%
- Brand-name118 claims10%
- Other29 claims2%
Dr. Chen'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,0512024: 1,0803%
Drugs named by CMS: 18 in 2024, 16 in 2023.
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. Sako Chen offers telehealth to Medicare patients
Dr. Chen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chen as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Sako Chen received $52 in industry payments from 2016 to 2025
CMS Open Payments shows 2 general payments to Dr. Chen from 2 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Eisai Inc. paid the most, $28.
General payments to Dr. Chen by program year, 2016 to 2025
Companies that paid Dr. Chen the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Sako Chen graduated from Cleveland Medical College, Homeopathic
Dr. Chen graduated from Cleveland Medical College, Homeopathic in 1999.
- Medical school
- Board certified in endocrinology, diabetes and metabolism
Source: Dmand AI Professional Profile Data
Dr. Sako Chen accepts plans from 1 insurance carrier
Dr. Chen is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Sako Chen's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Sako Chen
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. Sako Chen's NPI number?
Dr. Sako Chen's NPI number is 1346350105. It was assigned on August 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Sako Chen?
Dr. Sako Chen is an endocrinologist in Bellflower, California. The primary specialty in the NPI Registry is Endocrinology, Diabetes & Metabolism Physician (taxonomy code 207RE0101X).
Where does Dr. Sako Chen practice?
Dr. Chen practices at 9400 Rosecrans Avenue, Bellflower, CA 90706. Dr. Chen's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California. Dmand AI also links Dr. Chen to 1 breast imaging center and 1 group practice or clinic.
What is Dr. Sako Chen's medical license number?
Dr. Chen holds California license A74977.
What medical group is Dr. Sako Chen part of?
Dr. Chen is linked to Southern California Permanente Medical Group.
Does Dr. Sako Chen accept Medicare?
Yes. CMS lists Dr. Chen as accepting Medicare assignment.
Does Dr. Sako Chen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chen as offering telehealth services.
How many Medicare patients does Dr. Sako Chen see?
CMS counts 14 Medicare patients who saw Dr. Chen in 2024, with an average age of 61.
Is Dr. Sako Chen board certified?
Yes. Dr. Chen is board certified in endocrinology, diabetes and metabolism by the American Board of Internal Medicine.
Where did Dr. Sako Chen go to medical school?
Dr. Chen graduated from Cleveland Medical College, Homeopathic in 1999.
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What drugs does Dr. Sako Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Levothyroxine Sodium, Methimazole and Hydrocortisone.
Has Dr. Sako Chen received payments from drug or device companies?
CMS Open Payments shows $52 in general payments to Dr. Chen from 2 companies from 2016 to 2025. The largest total came from Eisai Inc.
How long has Dr. Sako Chen been practicing?
Dr. Chen graduated from medical school in 1999, 27 years ago.
What insurance does Dr. Sako Chen accept?
Dr. Chen is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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