Dr. Michael Hien Bien, MD
- Medicare services, 2024
- 2,376
- Medicare patients, 2024
- 430
- Part D claims, 2024
- 3,909
- Hospital affiliations
- 6
- Industry payments
- $28,658
- Practice address
- 255 E Bonita Ave, Pomona, CA 91767
- Practice phone
- Call (909) 596-7733
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Bien's professional email, personal email and mobile number
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Dr. Michael Hien Bien is a nephrologist in Pomona, California
Dr. Bien practices at Casa Colina Hospital and Centers for Healthcare in Pomona, California, part of Casa Colina Hospital and Centers for Healthcare.
Dr. Bien's NPI, 1689680654, was assigned on July 31, 2006. Dr. Bien graduated from Irvine California College of Medicine in 2004. Dr. Bien holds California license A74264.
- NPI
- 1689680654NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9931191681
- NPI enumeration date
- July 31, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (909) 596-7733
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Hien Bien practices at Casa Colina Hospital and Centers for Healthcare in Pomona, California
Dr. Bien's primary practice is Casa Colina Hospital and Centers for Healthcare, at 255 E Bonita Ave, Pomona, CA 91767 in Los Angeles County. The practice phone is (909) 596-7733.
- Casa Colina Hospital and Centers for Healthcare255 E Bonita Ave, Pomona, CA 91767 · Los Angeles CountyPhone(909) 596-7733
Source: Dmand AI Affiliation Data
Dr. Michael Hien Bien is affiliated with 13 sites of care and 4 medical groups
Dr. Bien's primary practice is Casa Colina Hospital and Centers for Healthcare in Pomona, California, part of Casa Colina Hospital and Centers for Healthcare. Dr. Bien is also affiliated with Pomona Valley Hospital Medical Center. The medical group on file is California Kidney Specialists. Dmand AI also links Dr. Bien to 4 more hospitals, 3 dialysis centers, 3 group practices and clinics, 3 medical groups and 1 ambulatory surgery center, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael Hien Bien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Bien practices, 13 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Casa Colina Hospital and Centers for Healthcare | Available with a free account |
| +12 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Casa Colina Hospital and Centers for Healthcare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Michael Hien Bien is one of 1,401 nephrologists in California
Nephrology is Dr. Bien's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Bien is licensed in California.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
Nephrologists near Dr. Bien
Counts of nephrologists 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 Hien Bien billed Medicare for 2,376 services in 2024
CMS data shows 2,376 Medicare services from Dr. Bien across 11 procedure codes in 2024, for 430 Medicare patients. Medicare paid $362,829 for them.
Dr. Bien's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,3422024: 1,4508%
- Tests and treatments
- 2023: 9062024: 9262%
Where Dr. Bien's Medicare services took place, 2024
- In an office1,36457%
- In a facility1,01243%
Dr. Bien compared with the California median for nephrologists, 2024
- Dr. Bien
- California median
- Medicare services
- 2,376vs 1,0842.2 times
- Medicare patients
- 430vs 30740% above
- Part D claims
- 3,679vs 9553.9 times
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Bien'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.
Need commercial claims for Dr. Bien?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Bien and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Hien Bien treated 430 Medicare patients in 2024, average age 70
CMS counts 430 Medicare patients who saw Dr. Bien in 2024. The largest group is 65 to 74, with 146 patients. 75% of them have chronic kidney disease, and 75% have diabetes. 66% are also on Medicaid. Their average risk score is 4.97, 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. Bien's median patient age at 70, with 48% women.
Dr. Bien's Medicare patients by age, 2024
Dr. Bien's Medicare patients by sex, 2024
- Women20047%
- Men23053%
Chronic conditions among Dr. Bien's Medicare patients, 2024
- Chronic kidney disease75%
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Heart failure54%
- Ischemic heart disease46%
- Arthritis43%
- Atrial fibrillation32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Bien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women48%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael Hien Bien wrote 3,909 Medicare Part D claims in 2024
In 2024, Dr. Bien wrote 3,909 Medicare Part D claims for 295 patients. 77% of them were for generic drugs. CMS names the drug for 3,679 of them, across 66 drugs with 11 or more claims each, at $784,323 in total drug cost. In 2023, CMS named 2,918 claims across 51 drugs.
Dr. Bien's Part D claims by kind of drug, 2024
- Generic3,024 claims77%
- Brand-name836 claims21%
- Other49 claims1%
Dr. Bien'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. Bien's Part D claims, 2024
- Antibiotics1%33 of 3,909 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: 2,9182024: 3,67926%
Drugs named by CMS: 66 in 2024, 51 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. Michael Hien Bien offers telehealth to Medicare patients
Dr. Bien accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Bien as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Michael Hien Bien received $28,658 in industry payments from 2016 to 2025
CMS Open Payments shows 148 general payments to Dr. Bien from 21 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 82% of the total. AstraZeneca Pharmaceuticals LP paid the most, $26,238. It also lists 2 research payments totaling $4,800 in 2016.
General payments to Dr. Bien by program year, 2016 to 2025
General payments to Dr. Bien by kind, 2016 to 2025
- Speaker and faculty fees$23,50082%
- Food and beverage$4,46516%
- Travel and lodging$6932%
Companies that paid Dr. Bien 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. Michael Hien Bien graduated from Irvine California College of Medicine
Dr. Bien graduated from Irvine California College of Medicine in 2004.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael Hien Bien'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 DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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 |
| 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 Hien Bien
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 Hien Bien's NPI number?
Dr. Michael Hien Bien's NPI number is 1689680654. It was assigned on July 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Hien Bien?
Dr. Michael Hien Bien is a nephrologist in Pomona, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Michael Hien Bien practice?
Dr. Bien practices at 255 E Bonita Ave, Pomona, CA 91767. Dr. Bien's primary practice is Casa Colina Hospital and Centers for Healthcare in Pomona, California, part of Casa Colina Hospital and Centers for Healthcare. Dmand AI also links Dr. Bien to 4 hospitals, 3 dialysis centers, 3 group practices and clinics, 3 medical groups and 1 ambulatory surgery center.
What is Dr. Michael Hien Bien's office phone number?
The practice phone on file for Dr. Bien is (909) 596-7733.
What is Dr. Michael Hien Bien's medical license number?
Dr. Bien holds California license A74264.
Which hospitals is Dr. Michael Hien Bien affiliated with?
Dr. Bien practices at Casa Colina Hospital and Centers for Healthcare in Pomona, California. Dr. Bien is also affiliated with Pomona Valley Hospital Medical Center. Dmand AI links Dr. Bien to 4 more hospitals.
What medical group is Dr. Michael Hien Bien part of?
Dr. Bien is linked to California Kidney Specialists. Dmand AI links Dr. Bien to 3 more medical groups.
Does Dr. Michael Hien Bien accept Medicare?
Yes. CMS data shows Dr. Bien billed Medicare for 2,376 services in 2024, and Dr. Bien accepts Medicare assignment.
Does Dr. Michael Hien Bien offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Bien as offering telehealth services.
How many Medicare patients does Dr. Michael Hien Bien see?
CMS counts 430 Medicare patients who saw Dr. Bien in 2024, with an average age of 70.
Show 5 more questionsShow fewer questions
What services does Dr. Michael Hien Bien bill to Medicare?
In 2024, Dr. Bien's most billed Medicare services were hospital inpatient care (99232), dialysis (90960) and dialysis (90961).
Where did Dr. Michael Hien Bien go to medical school?
Dr. Bien graduated from Irvine California College of Medicine in 2004.
What drugs does Dr. Michael Hien Bien prescribe most?
In 2024 Medicare Part D data, Dr. Bien's most prescribed drugs by claims were Amlodipine Besylate, Hydralazine HCl and Furosemide.
Has Dr. Michael Hien Bien received payments from drug or device companies?
CMS Open Payments shows $28,658 in general payments to Dr. Bien from 21 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Michael Hien Bien been practicing?
Dr. Bien graduated from medical school in 2004, 22 years ago.
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