Dr. Michael W. Chien, MD
- Part D claims, 2022
- 11
- Hospital affiliations
- 1
- Industry payments
- $338
- Medical group
- 1
- Insurance carriers
- 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. Chien'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. Michael W. Chien is an allergy physician in Bellflower, California
Dr. Chien practices at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California.
Dr. Chien's NPI, 1689741555, was assigned on November 29, 2006. Dr. Chien graduated from University of Missouri School of Medicine in 1989. Dr. Chien holds California license G70196.
- NPI
- 1689741555NPI Registry (opens in a new tab)
- NPI enumeration date
- November 29, 2006
- NPI status
- Active
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Michael W. Chien practices at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California
Dr. Chien'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. Michael W. Chien is affiliated with 3 sites of care and 1 medical group
Dr. Chien's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California. Dr. Chien is also affiliated with Fontana Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Chien to 1 more breast imaging center, named with a free account. Dr. Chien's employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Michael W. Chien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chien 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. Michael W. Chien is one of 136 allergy physicians in California
Allergy is Dr. Chien's primary specialty in the NPI Registry, under taxonomy code 207KA0200X. Dr. Chien is board certified in allergy & immunology by the American Board of Allergy and Immunology. Dr. Chien is licensed in California.
Specialties and state licenses
- Allergy, CaliforniaPrimary
Allergy physicians near Dr. Chien
Counts of allergy 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
Dr. Michael W. Chien's patients have a median age of 45
Across all payers, Dmand AI patient panel data puts Dr. Chien's median patient age at 45, with 83% women.
Dr. Chien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 45
Patient panel by sex, all payers
- Women83%
- Men17%
Source: Dmand AI Patient Panel Data
Dr. Michael W. Chien wrote 11 Medicare Part D claims in 2022
In 2022, Dr. Chien wrote 11 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $420 in total drug cost. In 2021, CMS named 127 claims across 6 drugs.
Dr. Chien's most prescribed drugs by claims, 2022
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, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 1272022: 1191%
Drugs named by CMS: 1 in 2022, 6 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Michael W. Chien received $338 in industry payments from 2023 to 2024
CMS Open Payments shows 3 general payments to Dr. Chien from 3 drug and device companies from 2023 to 2024. Food and beverage make up the largest share, 100% of the total. Palette Life Sciences, Inc. paid the most, $151.
General payments to Dr. Chien by program year, 2023 to 2024
Companies that paid Dr. Chien the most, 2023 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael W. Chien has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chien, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Chien
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Michael W. Chien graduated from University of Missouri School of Medicine
Dr. Chien graduated from University of Missouri School of Medicine in 1989.
- Medical school
- Board certified in allergy & immunology
Source: Dmand AI Professional Profile Data
Dr. Michael W. Chien accepts plans from 1 insurance carrier
Dr. Chien is in network with 1 carrier, including Kaiser Permanente. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
Plan types Dr. Chien accepts, by number of carriers
- EPO1
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael W. Chien'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Michael W. Chien
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. Michael W. Chien's NPI number?
Dr. Michael W. Chien's NPI number is 1689741555. It was assigned on November 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael W. Chien?
Dr. Michael W. Chien is an allergy physician in Bellflower, California. The primary specialty in the NPI Registry is Allergy Physician (taxonomy code 207KA0200X).
Where does Dr. Michael W. Chien practice?
Dr. Chien practices at 9400 Rosecrans Avenue, Bellflower, CA 90706. Dr. Chien's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California. Dmand AI also links Dr. Chien to 1 breast imaging center.
What is Dr. Michael W. Chien's medical license number?
Dr. Chien holds California license G70196.
Which hospitals is Dr. Michael W. Chien affiliated with?
Dr. Chien is affiliated with Fontana Medical Center.
What medical group is Dr. Michael W. Chien part of?
Dr. Chien is linked to Southern California Permanente Medical Group.
Is Dr. Michael W. Chien board certified?
Yes. Dr. Chien is board certified in allergy & immunology by the American Board of Allergy and Immunology.
Where did Dr. Michael W. Chien go to medical school?
Dr. Chien graduated from University of Missouri School of Medicine in 1989.
What drugs does Dr. Michael W. Chien prescribe most?
In 2022 Medicare Part D data, Dr. Chien's most prescribed drugs by claims were Ipratropium Bromide.
Has Dr. Michael W. Chien received payments from drug or device companies?
CMS Open Payments shows $338 in general payments to Dr. Chien from 3 companies from 2023 to 2024. The largest total came from Palette Life Sciences, Inc.
How long has Dr. Michael W. Chien been practicing?
Dr. Chien graduated from medical school in 1989, 37 years ago.
What insurance does Dr. Michael W. Chien accept?
Dr. Chien is in network with 1 carrier, including Kaiser Permanente. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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