Biomechanical PhenomenaBone and BonesBone Density
Willy Wiyasa Tjong
NPI1831544196PAC ID9739427287
- Medicare services, 2024
- 5,341
- Medicare patients, 2024
- 3,621
- Publications
- 3
- MIPS score, 2024
- 100
- Hospital affiliations
- 6
- Practice address
- 1555 Soquel Drive, Santa Cruz, CA 95065
- Practice phone
- Call (831) 462-7700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Willy Tjong'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.
Willy Wiyasa Tjong is a diagnostic radiologist in Santa Cruz, California
Willy Tjong practices at Dignity Health - Dominican Hospital in Santa Cruz, California, part of CommonSpirit Health.
Willy Tjong's NPI, 1831544196, was assigned on April 24, 2016. Willy Tjong graduated from SUNY Upstate Medical University in 2016. Willy Tjong's California license number on file is A173468.
NPI and contact details
- NPI
- 1831544196NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739427287
- NPI enumeration date
- April 24, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (831) 462-7700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Willy Wiyasa Tjong practices at Dignity Health - Dominican Hospital in Santa Cruz, California
Willy Tjong's primary practice is Dignity Health - Dominican Hospital, at 1555 Soquel Drive, Santa Cruz, CA 95065 in Santa Cruz County. The practice phone is (831) 462-7700.
- Dignity Health - Dominican Hospital1555 Soquel Drive, Santa Cruz, CA 95065 · Santa Cruz CountyPhone(831) 462-7700
Source: Dmand AI Affiliation Data
Willy Wiyasa Tjong is affiliated with 6 sites of care and 4 medical groups
Willy Tjong's primary practice is Dignity Health - Dominican Hospital in Santa Cruz, California, part of CommonSpirit Health. Willy Tjong is also affiliated with UCSF Helen Diller Medical Center at Parnassus Heights. The medical group on file is Mercy Medical Group. Dmand AI also links Willy Tjong to 4 more hospitals and 3 medical groups, each named with a free account.
UCSF Helen Diller Medical Center at Parnassus HeightsMercy Medical Group4 hospitalsNames with a free account3 medical groupsNames with a free account
See all 10 affiliations for Willy TjongSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Willy Wiyasa Tjong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Willy Tjong practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - Dominican Hospital | Available with a free account |
| +5 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Willy Wiyasa Tjong is one of 4,096 diagnostic radiologists in California
Diagnostic radiology is Willy Tjong's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Willy Tjong is board certified in diagnostic radiology by the American Board of Radiology. Dmand AI has Willy Tjong's licenses on file in 3 states: California, Florida and Georgia.
Specialties and state licenses
- Diagnostic radiology, CaliforniaPrimary
- Florida license
- Georgia license
Diagnostic radiologists near Willy Tjong
Counts of diagnostic radiologists with a Dmand AI profile, by place and practice. Each opens the list.
4,096diagnostic radiologists in California10diagnostic radiologists in Santa Cruz8diagnostic radiologists at Dignity Health - Dominican Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Willy Wiyasa Tjong billed Medicare for 5,341 services in 2024
CMS data shows 5,341 Medicare services from Willy Tjong across 61 procedure codes in 2024, for 3,621 Medicare patients. Medicare paid $168,132 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 20245,341
Medicare patients3,621
Paid by Medicare$168,132
Procedure codes61
Willy Tjong's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 3,4012024: 5,18352%
- Tests and treatments
- 2023: 192024: 158732%
Willy Tjong compared with the California median for diagnostic radiologists, 2024
- Willy Tjong
- California median
- Medicare services
- 5,341vs 2,2812.3 times
- Medicare patients
- 3,621vs 1,3462.7 times
Medians across 3,734 diagnostic radiologists in California with Dmand AI profiles that report each measure.
Willy Tjong'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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Medicare shows one payer. Book a meeting to get commercial claims data for Willy Tjong and other diagnostic radiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Willy Wiyasa Tjong treated 3,621 Medicare patients in 2024, average age 77
CMS counts 3,621 Medicare patients who saw Willy Tjong in 2024. The largest group is 75 to 84, with 1,305 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 34% are also on Medicaid. Their average risk score is 1.81, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Willy Tjong's median patient age at 59, with 50% women.
Medicare patients, 20243,621
Average age77
Average risk score1.81
Also on Medicaid34%
Willy Tjong's Medicare patients by age, 2024
Willy Tjong's Medicare patients by sex, 2024
- Women1,93253%
- Men1,68947%
Chronic conditions among Willy Tjong's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis53%
- Diabetes34%
- Ischemic heart disease34%
- Chronic kidney disease33%
- Mood disorders33%
- Atrial fibrillation32%
Share of Medicare patients with each condition. A patient can have several.
Willy Tjong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women50%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Willy Wiyasa Tjong scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Willy Tjong for performance year 2024, reported as part of a group. Willy Tjong accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Willy Tjong's MIPS scores, performance year 2024
- 100of 100Final score
- 96.9of 100Quality
- 40of 100Improvement Activities
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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Willy Wiyasa Tjong has 3 publications on record
Dmand AI links 3 papers to Willy Tjong in 2014. The most frequent topics are Tomography, X-Ray Computed, Radius and Tibia. Willy Tjong has published most often in Med Phys. Willy Tjong's most frequent co-authors are Brian Feeley, MD, Thomas M. Link, MD and Chunbong Benjamin Ma, MD.
Papers3
Topics Willy Tjong writes about most
- Tomography, X-Ray Computed
- Radius
- Tibia
Willy Tjong's most frequent co-authors
- Brian Feeley, MD1 shared paper
- Thomas M. Link, MD1 shared paper
- Chunbong Benjamin Ma, MD1 shared paper
Recent publications by Willy Tjong
AlgorithmsRadiographic Image EnhancementRadiographic Image Interpretation, Computer-Assisted
Image Processing, Computer-AssistedPorosityRadius
See who Willy Tjong researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Willy Tjong works with, so you can find a warm path to the right diagnostic radiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Willy Wiyasa Tjong graduated from SUNY Upstate Medical University
Willy Tjong graduated from SUNY Upstate Medical University in 2016.
- Medical school
- Board certified in diagnostic radiology
- Board certified in neuroradiology
Source: Dmand AI Professional Profile Data
Willy Wiyasa Tjong accepts plans from 7 insurance carriers
Willy Tjong is in network with 7 carriers, including Elevance, United Healthcare and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Aspirus Health Plan
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
Plan types Willy Tjong accepts, by number of carriers
- Medicare5
- PPO4
- POS3
- EPO2
- HMO2
Source: Dmand AI Insurance Network Data
Sources for Willy Wiyasa Tjong'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 Willy Wiyasa Tjong
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Willy Wiyasa Tjong's NPI number?
Willy Wiyasa Tjong's NPI number is 1831544196. It was assigned on April 24, 2016, and it is active in the NPI Registry.
What does Willy Wiyasa Tjong specialize in?
Willy Wiyasa Tjong is a diagnostic radiologist in Santa Cruz, California. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Willy Wiyasa Tjong practice?
Willy Tjong practices at 1555 Soquel Drive, Santa Cruz, CA 95065. Willy Tjong's primary practice is Dignity Health - Dominican Hospital in Santa Cruz, California, part of CommonSpirit Health. Dmand AI also links Willy Tjong to 4 hospitals and 3 medical groups.
What is Willy Wiyasa Tjong's office phone number?
The practice phone on file for Willy Tjong is (831) 462-7700.
What is Willy Wiyasa Tjong's medical license number?
Willy Tjong's California license number on file is A173468, one of the licenses on file in 3 states.
Which states has Willy Wiyasa Tjong been licensed in?
Dmand AI has state licenses on file for Willy Tjong in California (2021 to 2025), Florida (2022 to 2026) and Georgia (2022 to 2025).
Which hospitals is Willy Wiyasa Tjong affiliated with?
Willy Tjong practices at Dignity Health - Dominican Hospital in Santa Cruz, California. Willy Tjong is also affiliated with UCSF Helen Diller Medical Center at Parnassus Heights. Dmand AI links Willy Tjong to 4 more hospitals.
What medical group is Willy Wiyasa Tjong part of?
Willy Tjong is linked to Mercy Medical Group. Dmand AI links Willy Tjong to 3 more medical groups.
Does Willy Wiyasa Tjong accept Medicare?
Yes. CMS data shows Willy Tjong billed Medicare for 5,341 services in 2024, and Willy Tjong accepts Medicare assignment.
What is Willy Wiyasa Tjong's MIPS score?
Willy Tjong's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
Show 8 more questionsShow fewer questions
How many Medicare patients does Willy Wiyasa Tjong see?
CMS counts 3,621 Medicare patients who saw Willy Tjong in 2024, with an average age of 77.
Is Willy Wiyasa Tjong board certified?
Yes. Willy Tjong is board certified in diagnostic radiology by the American Board of Radiology.
What services does Willy Wiyasa Tjong bill to Medicare?
In 2024, Willy Tjong's most billed Medicare services were diagnostic imaging (71045), diagnostic imaging (70450) and diagnostic imaging (74177).
Where did Willy Wiyasa Tjong go to medical school?
Willy Tjong graduated from SUNY Upstate Medical University in 2016.
How long has Willy Wiyasa Tjong been practicing?
Willy Tjong graduated from medical school in 2016, 10 years ago.
Does Willy Wiyasa Tjong do research?
Dmand AI links 3 publications to Willy Tjong.
Who does Willy Wiyasa Tjong publish with?
Willy Tjong's most frequent co-authors are Brian Feeley, MD (1 shared paper), Thomas M. Link, MD (1 shared paper) and Chunbong Benjamin Ma, MD (1 shared paper).
What insurance does Willy Wiyasa Tjong accept?
Willy Tjong is in network with 7 carriers, including Elevance, United Healthcare and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
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