Analgesics, OpioidAnesthesia, SpinalAnesthetics, Local
Dr. Michael Tien, MD
NPI1427589175PAC ID8426437302
- Medicare services, 2024
- 82
- Medicare patients, 2024
- 139
- Publications
- 11
- Hospital affiliations
- 2
- Industry payments
- $373
- Practice address
- 1100 West Stewart Dr, Orange, CA 92868
- Practice phone
- Call (714) 633-9111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Michael Tien is an anesthesiologist in Orange, California
Dr. Tien practices at Providence St. Joseph Hospital Orange in Orange, California, part of Providence Health & Services.
Dr. Tien's NPI, 1427589175, was assigned on March 24, 2017. Dr. Tien graduated from Mayo Clinic Alix School of Medicine - Rochester in 2017. Dr. Tien holds California license A156920.
NPI and contact details
- NPI
- 1427589175NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426437302
- NPI enumeration date
- March 24, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 633-9111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Tien practices at Providence St. Joseph Hospital Orange in Orange, California
Dr. Tien's primary practice is Providence St. Joseph Hospital Orange, at 1100 West Stewart Dr, Orange, CA 92868 in Orange County. The practice phone is (714) 633-9111.
- Providence St. Joseph Hospital Orange1100 West Stewart Dr, Orange, CA 92868 · Orange CountyPhone(714) 633-9111
Source: Dmand AI Affiliation Data
Dr. Michael Tien is affiliated with 2 sites of care and 1 medical group
Dr. Tien's primary practice is Providence St. Joseph Hospital Orange in Orange, California, part of Providence Health & Services. Dr. Tien is also affiliated with MemorialCare Saddleback Medical Center. The medical group on file is Allied Anesthesia Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael Tien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tien practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence St. Joseph Hospital Orange | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael Tien is one of 6,593 anesthesiologists in California
Anesthesiology is Dr. Tien's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Tien is board certified in adult cardiac anesthesiology by the American Board of Anesthesiology. Dr. Tien is licensed in California.
Specialties and state licenses
- Anesthesiology, CaliforniaPrimary
Anesthesiologists near Dr. Tien
Counts of anesthesiologists with a Dmand AI profile, by place and practice. Each opens the list.
6,593anesthesiologists in California223anesthesiologists in Orange24anesthesiologists at Providence St. Joseph Hospital Orange
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Michael Tien billed Medicare for 82 services in 2024
CMS data shows 82 Medicare services from Dr. Tien across 4 procedure codes in 2024, for 139 Medicare patients. Medicare paid $11,175 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202482
Medicare patients139
Paid by Medicare$11,175
Procedure codes4
Dr. Tien's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 142024: 30114%
- Imaging
- 2023: 172024: 2653%
- Surgery
- 2023: 182024: 2644%
Dr. Tien compared with the California median for anesthesiologists, 2024
- Dr. Tien
- California median
- Medicare services
- 82vs 7214% above
- Medicare patients
- 139vs 143Close to median
Medians across 5,562 anesthesiologists in California with Dmand AI profiles that report each measure.
Dr. Tien'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. Tien?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tien and other anesthesiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Tien treated 139 Medicare patients in 2024, average age 75
CMS counts 139 Medicare patients who saw Dr. Tien in 2024. The largest group is 75 to 84, with 56 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 21% are also on Medicaid. Their average risk score is 2.85, 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. Tien's median patient age at 68, with 55% women.
Medicare patients, 2024139
Average age75
Average risk score2.85
Also on Medicaid21%
Dr. Tien's Medicare patients by age, 2024
Dr. Tien's Medicare patients by sex, 2024
- Women5741%
- Men8259%
Chronic conditions among Dr. Tien's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease55%
- Arthritis54%
- Heart failure49%
- Atrial fibrillation48%
- Chronic kidney disease44%
- Diabetes41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Michael Tien takes part in Medicare
Dr. Tien 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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Dr. Michael Tien has 11 publications on record
Dmand AI links 11 papers to Dr. Tien, published from 2015 to 2019. 2016 was the busiest year, with 3. The most frequent topics are Blood Glucose, Dexamethasone and Analgesics, Opioid. Dr. Tien has published most often in Anaesthesia. Dr. Tien's most frequent co-authors are Christopher Michael Aiudi, MD, PharmD, Terrence Kelburn Allen, MD and Katherine W. Arendt, MD.
Papers11
Years published2015 to 2019
Dr. Tien's papers by year, 2015 to 2019
Topics Dr. Tien writes about most
- Blood Glucose
- Dexamethasone
- Analgesics, Opioid
- Anesthesia, Spinal
- Antiemetics
Dr. Tien's most frequent co-authors
- Christopher Michael Aiudi, MD, PharmD1 shared paper
- Terrence Kelburn Allen, MD1 shared paper
- Katherine W. Arendt, MD1 shared paper
Recent publications by Dr. Tien
J Cardiothorac Vasc Anesth
Aortic Aneurysm, ThoracicAortic DissectionHospital Mortality
AnesthesiologyCritical CareCurriculum
Anesthesia, EpiduralBlood Patch, EpiduralCatheterization
See who Dr. Tien researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Tien works with, so you can find a warm path to the right anesthesiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Michael Tien received $373 in industry payments from 2024 to 2025
CMS Open Payments shows 7 general payments to Dr. Tien from 3 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Octapharma USA, Inc. paid the most, $149.
General payments to Dr. Tien by program year, 2024 to 2025
Companies that paid Dr. Tien the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael Tien's committees and leadership roles
Dr. Tien's committees and leadership roles
- Chief Resident CouncilChief Resident
- 2020 to 2021
- Residency Education CommitteeMember
- 2018 to 2021
Source: Dmand AI Professional Profile Data
Dr. Michael Tien graduated from Mayo Clinic Alix School of Medicine - Rochester
Dr. Tien graduated from Mayo Clinic Alix School of Medicine - Rochester in 2017. Dr. Tien is a member of American Society of Anesthesiologist (ASA), California Society of Anesthesiologists (CSA), International Anesthesia Research Society (IARS) and Society of Cardiovascular Anesthesiologists.
- Medical school
- Board certified in adult cardiac anesthesiology
- Board certified in anesthesiology
- Board certified in advanced perioperative transesophageal echocardiography
Source: Dmand AI Professional Profile Data
Dr. Michael Tien accepts plans from 1 insurance carrier
Dr. Tien 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. Michael Tien'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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 Tien
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 Tien's NPI number?
Dr. Michael Tien's NPI number is 1427589175. It was assigned on March 24, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Tien?
Dr. Michael Tien is an anesthesiologist in Orange, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Michael Tien practice?
Dr. Tien practices at 1100 West Stewart Dr, Orange, CA 92868. Dr. Tien's primary practice is Providence St. Joseph Hospital Orange in Orange, California, part of Providence Health & Services.
What is Dr. Michael Tien's office phone number?
The practice phone on file for Dr. Tien is (714) 633-9111.
What is Dr. Michael Tien's medical license number?
Dr. Tien holds California license A156920.
Which hospitals is Dr. Michael Tien affiliated with?
Dr. Tien practices at Providence St. Joseph Hospital Orange in Orange, California. Dr. Tien is also affiliated with MemorialCare Saddleback Medical Center.
What medical group is Dr. Michael Tien part of?
Dr. Tien is linked to Allied Anesthesia Medical Group.
Does Dr. Michael Tien accept Medicare?
Yes. CMS data shows Dr. Tien billed Medicare for 82 services in 2024, and Dr. Tien accepts Medicare assignment.
How many Medicare patients does Dr. Michael Tien see?
CMS counts 139 Medicare patients who saw Dr. Tien in 2024, with an average age of 75.
Is Dr. Michael Tien board certified?
Yes. Dr. Tien is board certified in adult cardiac anesthesiology by the American Board of Anesthesiology.
Show 7 more questionsShow fewer questions
What services does Dr. Michael Tien bill to Medicare?
In 2024, Dr. Tien's most billed Medicare services were surgery: heart and blood vessels (36620), ultrasound (76937) and anesthesia (00560).
Where did Dr. Michael Tien go to medical school?
Dr. Tien graduated from Mayo Clinic Alix School of Medicine - Rochester in 2017.
Has Dr. Michael Tien received payments from drug or device companies?
CMS Open Payments shows $373 in general payments to Dr. Tien from 3 companies from 2024 to 2025. The largest total came from Octapharma USA, Inc.
How long has Dr. Michael Tien been practicing?
Dr. Tien graduated from medical school in 2017, 9 years ago.
Does Dr. Michael Tien do research?
Dmand AI links 11 publications to Dr. Tien, published from 2015 to 2019.
Who does Dr. Michael Tien publish with?
Dr. Tien's most frequent co-authors are Christopher Michael Aiudi, MD, PharmD (1 shared paper), Terrence Kelburn Allen, MD (1 shared paper) and Katherine W. Arendt, MD (1 shared paper).
What insurance does Dr. Michael Tien accept?
Dr. Tien 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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