Carcinoma, AdenosquamousColorectal NeoplasmsLymphocytes, Tumor-Infiltrating
Dr. Won-Tak Choi, MD, PhD
NPI1275860918PAC ID1052623923
- Medicare services, 2024
- 1,672
- Medicare patients, 2024
- 515
- Publications
- 68
- MIPS score, 2024
- 85
- Hospital affiliations
- 3
- Practice address
- 505 Parnassus Ave, Box 0296, San Francisco, CA 94143
- Practice phone
- Call (415) 353-2733
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Choi'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. Won-Tak Choi is a pathologist in San Francisco, California
Dr. Choi practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health.
Dr. Choi's NPI, 1275860918, was assigned on November 16, 2009. Dr. Choi graduated from University of Illinois College of Medicine - Chicago in 2009. Dr. Choi holds California license A132954.
NPI and contact details
- NPI
- 1275860918NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1052623923
- NPI enumeration date
- November 16, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (415) 353-2733
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Won-Tak Choi practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California
Dr. Choi's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights, at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143 in San Francisco County. The practice phone is (415) 353-2733.
- UCSF Helen Diller Medical Center at Parnassus Heights505 Parnassus Ave, Box 0296, San Francisco, CA 94143 · San Francisco CountyPhone(415) 353-2733
Source: Dmand AI Affiliation Data
Dr. Won-Tak Choi is affiliated with 3 sites of care and 3 medical groups
Dr. Choi's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. Dr. Choi is also affiliated with UCSF Health Stanyan Hospital. The medical group on file is UCSF Pediatrics. Dmand AI also links Dr. Choi to 1 more hospital and 2 medical groups, each named with a free account.
UCSF Health Stanyan HospitalUCSF Pediatrics1 hospitalName with a free account2 medical groupsNames with a free account
See all 6 affiliations for Dr. ChoiSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Won-Tak Choi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Choi practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCSF Helen Diller Medical Center at Parnassus Heights | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Won-Tak Choi is one of 297 pathologists in California
Anatomic pathology is Dr. Choi's primary specialty in the NPI Registry, under taxonomy code 207ZP0101X. Dr. Choi is board certified in pathology - anatomic/pathology - clinical by the American Board of Pathology. Dmand AI has Dr. Choi's licenses on file in 2 states: California and Washington.
Specialties and state licenses
- Anatomic pathology, CaliforniaPrimary
- Washington license
Pathologists near Dr. Choi
Counts of pathologists with a Dmand AI profile, by place and practice. Each opens the list.
297pathologists in California34pathologists in San Francisco21pathologists at UCSF Helen Diller Medical Center at Parnassus Heights
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Won-Tak Choi billed Medicare for 1,672 services in 2024
CMS data shows 1,672 Medicare services from Dr. Choi across 10 procedure codes in 2024, for 515 Medicare patients. Medicare paid $54,825 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 20241,672
Medicare patients515
Paid by Medicare$54,825
Procedure codes10
Dr. Choi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 1,4802024: 1,67213%
Dr. Choi compared with the California median for pathologists, 2024
- Dr. Choi
- California median
- Medicare services
- 1,672vs 6782.5 times
- Medicare patients
- 515vs 2412.1 times
Medians across 211 pathologists in California with Dmand AI profiles that report each measure.
Dr. Choi'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Won-Tak Choi treated 515 Medicare patients in 2024, average age 71
CMS counts 515 Medicare patients who saw Dr. Choi in 2024. The largest group is 65 to 74, with 274 patients. 67% of them have high cholesterol, and 64% have high blood pressure. 30% are also on Medicaid. Their average risk score is 1.64, 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. Choi's median patient age at 55, with 54% women.
Medicare patients, 2024515
Average age71
Average risk score1.64
Also on Medicaid30%
Dr. Choi's Medicare patients by age, 2024
Dr. Choi's Medicare patients by sex, 2024
- Women26050%
- Men25550%
Chronic conditions among Dr. Choi's Medicare patients, 2024
- High cholesterol67%
- High blood pressure64%
- Arthritis34%
- Diabetes27%
- Cancer26%
- Mood disorders26%
- Depression24%
- Anxiety23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Choi'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
- Women54%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Won-Tak Choi scored 85 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Dr. Choi for performance year 2024, reported as part of a group. Dr. Choi accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Choi's MIPS scores, performance year 2024
- 85of 100Final score
- 81.1of 100Quality
- 40of 100Improvement Activities
- 71of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Won-Tak Choi has 68 publications on record
Dmand AI links 68 papers to Dr. Choi, published from 2007 to 2025. 2024 was the busiest year, with 11. The most frequent topics are Biopsy, Colorectal Neoplasms and Hyperplasia. Dr. Choi has published most often in Histopathology. Dr. Choi's most frequent co-authors are Sanjay Kakar, MD, Sarah E. Umetsu, MD and Oyedele Adeyi, MD.
Papers68
Years published2007 to 2025
Dr. Choi's papers by year, 2016 to 2025
Topics Dr. Choi writes about most
- Biopsy
- Colorectal Neoplasms
- Hyperplasia
- Inflammatory Bowel Diseases
- Receptors, CXCR4
- Adenocarcinoma
- Precancerous Conditions
- Barrett Esophagus
Dr. Choi's most frequent co-authors
Recent publications by Dr. Choi
AdenocarcinomaBiopsyColorectal Neoplasms
Int J Surg Pathol
BiopsyComplement C4bEsophageal Diseases
Biomarkers, TumorCarcinoma, NeuroendocrineInflammatory Bowel Diseases
Colonic PolypsColonoscopyColorectal Neoplasms
See who Dr. Choi researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Choi works with, so you can find a warm path to the right pathologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Won-Tak Choi graduated from University of Illinois College of Medicine - Chicago
Dr. Choi graduated from University of Illinois College of Medicine - Chicago in 2009.
- Medical school
- Board certified in pathology - anatomic/pathology - clinical
Source: Dmand AI Professional Profile Data
Dr. Won-Tak Choi accepts plans from 2 insurance carriers
Dr. Choi is in network with 2 carriers, including CMS Medicare and NV State Medicaid. Medicaid plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
- NV State Medicaid
Plan types Dr. Choi accepts, by number of carriers
- Medicaid1
- Medicare1
Source: Dmand AI Insurance Network Data
Sources for Dr. Won-Tak Choi'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)Clinician Public Reporting: Overall MIPS Performance (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 |
| 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. Won-Tak Choi
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. Won-Tak Choi's NPI number?
Dr. Won-Tak Choi's NPI number is 1275860918. It was assigned on November 16, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Won-Tak Choi?
Dr. Won-Tak Choi is a pathologist in San Francisco, California. The primary specialty in the NPI Registry is Anatomic Pathology Physician (taxonomy code 207ZP0101X).
Where does Dr. Won-Tak Choi practice?
Dr. Choi practices at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143. Dr. Choi's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. Dmand AI also links Dr. Choi to 1 hospital and 2 medical groups.
What is Dr. Won-Tak Choi's office phone number?
The practice phone on file for Dr. Choi is (415) 353-2733.
What is Dr. Won-Tak Choi's medical license number?
Dr. Choi holds California license A132954, one of the licenses on file in 2 states.
Which states has Dr. Won-Tak Choi been licensed in?
Dmand AI has state licenses on file for Dr. Choi in California (2014 to 2026) and Washington (2011 to 2015).
Which hospitals is Dr. Won-Tak Choi affiliated with?
Dr. Choi practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California. Dr. Choi is also affiliated with UCSF Health Stanyan Hospital. Dmand AI links Dr. Choi to 1 more hospital.
What medical group is Dr. Won-Tak Choi part of?
Dr. Choi is linked to UCSF Pediatrics. Dmand AI links Dr. Choi to 2 more medical groups.
Does Dr. Won-Tak Choi accept Medicare?
Yes. CMS data shows Dr. Choi billed Medicare for 1,672 services in 2024, and Dr. Choi accepts Medicare assignment.
What is Dr. Won-Tak Choi's MIPS score?
Dr. Choi's MIPS final score for performance year 2024 is 85 out of 100, reported as part of a group.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. Won-Tak Choi see?
CMS counts 515 Medicare patients who saw Dr. Choi in 2024, with an average age of 71.
Is Dr. Won-Tak Choi board certified?
Yes. Dr. Choi is board certified in pathology - anatomic/pathology - clinical by the American Board of Pathology.
What services does Dr. Won-Tak Choi bill to Medicare?
In 2024, Dr. Choi's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88341) and lab and pathology test (88342).
Where did Dr. Won-Tak Choi go to medical school?
Dr. Choi graduated from University of Illinois College of Medicine - Chicago in 2009.
How long has Dr. Won-Tak Choi been practicing?
Dr. Choi graduated from medical school in 2009, 17 years ago.
Does Dr. Won-Tak Choi do research?
Dmand AI links 68 publications to Dr. Choi, published from 2007 to 2025.
Who does Dr. Won-Tak Choi publish with?
Dr. Choi's most frequent co-authors are Sanjay Kakar, MD (2 shared papers), Sarah E. Umetsu, MD (2 shared papers) and Oyedele Adeyi, MD (1 shared paper).
What insurance does Dr. Won-Tak Choi accept?
Dr. Choi is in network with 2 carriers, including CMS Medicare and NV State Medicaid. Medicaid plans come from the most carriers, 1. Check the plan with the practice before a visit.
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