Dr. Cynthia Tien-Bao Chao, MD
- Medicare services, 2023
- 110
- Part D claims, 2023
- 58
- Hospital affiliations
- 1
- Industry payments
- $1,064
- Medical group
- 1
- Practice address
- 3181 SW Sam Jackson Park Road, Portland, OR 97239
- Practice phone
- Call (503) 494-9000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chao'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. Cynthia Tien-Bao Chao is a general surgeon in Portland, Oregon
Dr. Chao practices at OHSU Hospital in Portland, Oregon, part of State of Oregon.
Dr. Chao's NPI, 1124164207, was assigned on January 29, 2007. Dr. Chao graduated from Columbia University College of Physicians and Surgeons in 1989. Dr. Chao holds Washington license MD00037878.
- NPI
- 1124164207NPI Registry (opens in a new tab)
- NPI enumeration date
- January 29, 2007
- NPI status
- Active
- Practice phone
- (503) 494-9000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Cynthia Tien-Bao Chao practices at OHSU Hospital in Portland, Oregon
Dr. Chao's primary practice is OHSU Hospital, at 3181 SW Sam Jackson Park Road, Portland, OR 97239 in Multnomah County. The practice phone is (503) 494-9000.
- OHSU Hospital3181 SW Sam Jackson Park Road, Portland, OR 97239 · Multnomah CountyPhone(503) 494-9000
Source: Dmand AI Affiliation Data
Dr. Cynthia Tien-Bao Chao is affiliated with 2 sites of care and 1 medical group
Dr. Chao's primary practice is OHSU Hospital in Portland, Oregon, part of State of Oregon. The medical group on file is Legacy Medical Group-Northwest. Dmand AI also links Dr. Chao to 1 more clinical lab, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Cynthia Tien-Bao Chao's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chao practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| OHSU Hospital | 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. Cynthia Tien-Bao Chao is one of 438 general surgeons in Oregon
Surgery is Dr. Chao's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Chao is licensed in Washington.
Specialties and state licenses
- Surgery, WashingtonPrimary
General surgeons near Dr. Chao
Counts of general surgeons 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. Cynthia Tien-Bao Chao billed Medicare for 110 services in 2023
CMS data shows 110 Medicare services from Dr. Chao across 6 procedure codes in 2023. Medicare paid $19,898 for them.
Dr. Chao's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Surgery
- 2022: 02023: 49
- Office and hospital visits
- 2022: 562023: 4913%
- Imaging
- 2022: 02023: 12
Where Dr. Chao's Medicare services took place, 2023
- In an office4945%
- In a facility6155%
Dr. Chao compared with the Oregon median for general surgeons, 2023
- Dr. Chao
- Oregon median
- Medicare services
- 110vs 8333% above
- Part D claims
- 58vs 4723% above
Medians across 433 general surgeons in Oregon with Dmand AI profiles that report each measure.
Dr. Chao's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Cynthia Tien-Bao Chao's patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Dr. Chao's median patient age at 73, with 100% women.
Dr. Chao's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. Cynthia Tien-Bao Chao wrote 58 Medicare Part D claims in 2023
In 2023, Dr. Chao wrote 58 Medicare Part D claims. Every claim was for a generic drug. They cover 3 drugs, with $309 in total drug cost. In 2022, CMS named 74 claims across 4 drugs.
Dr. Chao's most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 742023: 5822%
Drugs named by CMS: 3 in 2023, 4 in 2022.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Cynthia Tien-Bao Chao received $1,064 in industry payments from 2016 to 2022
CMS Open Payments shows 16 general payments to Dr. Chao from 8 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 96% of the total. Genentech, Inc. paid the most, $341.
General payments to Dr. Chao by program year, 2016 to 2022
General payments to Dr. Chao by kind, 2016 to 2022
- Food and beverage$1,01896%
- Gifts$293%
- Education$172%
Companies that paid Dr. Chao the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Cynthia Tien-Bao Chao graduated from Columbia University College of Physicians and Surgeons
Dr. Chao graduated from Columbia University College of Physicians and Surgeons in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Cynthia Tien-Bao Chao'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 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) |
| 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. Cynthia Tien-Bao Chao
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. Cynthia Tien-Bao Chao's NPI number?
Dr. Cynthia Tien-Bao Chao's NPI number is 1124164207. It was assigned on January 29, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Cynthia Tien-Bao Chao?
Dr. Cynthia Tien-Bao Chao is a general surgeon in Portland, Oregon. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Cynthia Tien-Bao Chao practice?
Dr. Chao practices at 3181 SW Sam Jackson Park Road, Portland, OR 97239. Dr. Chao's primary practice is OHSU Hospital in Portland, Oregon, part of State of Oregon. Dmand AI also links Dr. Chao to 1 clinical lab.
What is Dr. Cynthia Tien-Bao Chao's office phone number?
The practice phone on file for Dr. Chao is (503) 494-9000.
What is Dr. Cynthia Tien-Bao Chao's medical license number?
Dr. Chao holds Washington license MD00037878.
Which hospitals is Dr. Cynthia Tien-Bao Chao affiliated with?
Dr. Chao practices at OHSU Hospital in Portland, Oregon.
What medical group is Dr. Cynthia Tien-Bao Chao part of?
Dr. Chao is linked to Legacy Medical Group-Northwest.
Does Dr. Cynthia Tien-Bao Chao accept Medicare?
Yes. CMS data shows Dr. Chao billed Medicare for 110 services in 2023.
What services does Dr. Cynthia Tien-Bao Chao bill to Medicare?
In 2023, Dr. Chao's most billed Medicare services were office visit, established patient (99213), office visit, new patient (99205) and surgery: skin and soft tissue (19301).
Where did Dr. Cynthia Tien-Bao Chao go to medical school?
Dr. Chao graduated from Columbia University College of Physicians and Surgeons in 1989.
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What drugs does Dr. Cynthia Tien-Bao Chao prescribe most?
In 2023 Medicare Part D data, Dr. Chao's most prescribed drugs by claims were Tramadol HCl, Gabapentin and Tamoxifen Citrate.
Has Dr. Cynthia Tien-Bao Chao received payments from drug or device companies?
CMS Open Payments shows $1,064 in general payments to Dr. Chao from 8 companies from 2016 to 2022. The largest total came from Genentech, Inc.
How long has Dr. Cynthia Tien-Bao Chao been practicing?
Dr. Chao graduated from medical school in 1989, 37 years ago.
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