Caspase 1Cells, CulturedDNA Fragmentation
Dr. Ying Chi, MD
NPI1518178169PAC ID2466645957
- Medicare services, 2024
- 1,349
- Medicare patients, 2024
- 130
- Part D claims, 2024
- 307
- Publications
- 4
- Hospital affiliations
- 1
- Practice address
- 11190 Warner Ave, Fountain Valley, CA 92708
- Practice phone
- Call (714) 427-0880
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Fountain Valley Regional Hospital - Outpatient Surgery Center
Fountain Valley, California
Find Dr. Chi's professional email, personal email and mobile number
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Dr. Ying Chi is an orthopaedic hand surgery physician in Fountain Valley, California
Dr. Chi practices at Fountain Valley Regional Hospital - Outpatient Surgery Center in Fountain Valley, California.
Dr. Chi's NPI, 1518178169, was assigned on May 25, 2007. Dr. Chi graduated from University Of Washington School Of Medicine in 2004. Dr. Chi holds California license A107272.
NPI and contact details
- NPI
- 1518178169NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2466645957
- NPI enumeration date
- May 25, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 427-0880
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ying Chi practices at Fountain Valley Regional Hospital - Outpatient Surgery Center in Fountain Valley, California
Dr. Chi's primary practice is Fountain Valley Regional Hospital - Outpatient Surgery Center, at 11190 Warner Ave, Fountain Valley, CA 92708 in Orange County. The practice phone is (714) 427-0880.
- Fountain Valley Regional Hospital - Outpatient Surgery Center11190 Warner Ave, Fountain Valley, CA 92708 · Orange CountyPhone(714) 427-0880
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ying Chi is affiliated with 3 sites of care
Dr. Chi's primary practice is Fountain Valley Regional Hospital - Outpatient Surgery Center in Fountain Valley, California. Dr. Chi is also affiliated with Hoag Hospital Newport Beach. Dmand AI also links Dr. Chi to 1 more physician office, named with a free account.
Fountain Valley Regional Hospital - Outpatient Surgery CenterPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Ying Chi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chi practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fountain Valley Regional Hospital - Outpatient Surgery Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ying Chi is one of 268 orthopaedic hand surgery physicians in California
Hand surgery is Dr. Chi's primary specialty in the NPI Registry, under taxonomy code 207XS0106X. Dr. Chi is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery. Dmand AI has Dr. Chi's licenses on file in 3 states: California, Ohio and Michigan.
Specialties and state licenses
- Orthopaedic hand surgery, CaliforniaPrimary
- Ohio license
- Orthopaedic surgery, Michigan
Clinical focus
Dmand AI lists arm, wrist, hand fracture and dislocation, arthritis, carpal tunnel syndrome, hand joint or tendon inflammation, joint arthropathy, joint pain and muscle pain, fibromyalgia, and limb pain among the conditions Dr. Chi treats.
Orthopaedic hand surgery physicians near Dr. Chi
Counts of orthopaedic hand surgery physicians 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. Ying Chi billed Medicare for 1,349 services in 2024
CMS data shows 1,349 Medicare services from Dr. Chi across 28 procedure codes in 2024, for 130 Medicare patients. Medicare paid $219,388 for them.
Medicare services, 20241,349
Medicare patients130
Paid by Medicare$219,388
Procedure codes28
Dr. Chi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 1,0162024: 9645%
- Imaging
- 2023: 2222024: 16526%
- Office and hospital visits
- 2023: 1992024: 15224%
- Drugs given in the office
- 2023: 1332024: 6849%
Where Dr. Chi's Medicare services took place, 2024
- In an office40630%
- In a facility94370%
Dr. Chi compared with the California median for orthopaedic hand surgery physicians, 2024
- Dr. Chi
- California median
- Medicare services
- 1,349vs 95841% above
- Medicare patients
- 130vs 34462% below
- Part D claims
- 292vs 515.7 times
Medians across 252 orthopaedic hand surgery physicians in California with Dmand AI profiles that report each measure.
Dr. Chi'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. Chi?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chi and other orthopaedic hand surgery physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ying Chi treated 130 Medicare patients in 2024, average age 74
CMS counts 130 Medicare patients who saw Dr. Chi in 2024. The largest group is 65 to 74, with 70 patients. 75% of them have high cholesterol, and 65% have arthritis. Their average risk score is 0.84, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chi's median patient age at 62, with 62% women.
Medicare patients, 2024130
Average age74
Average risk score0.84
Dr. Chi's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chi's Medicare patients by sex, 2024
- Women7759%
- Men5341%
Chronic conditions among Dr. Chi's Medicare patients, 2024
- High cholesterol75%
- Arthritis65%
- High blood pressure65%
- Diabetes25%
- Ischemic heart disease19%
- Chronic kidney disease18%
- Mood disorders18%
- Osteoporosis17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women62%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ying Chi wrote 307 Medicare Part D claims in 2024
In 2024, Dr. Chi wrote 307 Medicare Part D claims for 185 patients. 99% of them were for generic drugs. CMS names the drug for 292 of them, across 2 drugs with 11 or more claims each, at $1,100 in total drug cost. In 2023, CMS named 354 claims across 4 drugs.
Part D claims, 2024307
Drugs named by CMS2
Total drug cost$1,100
Part D patients185
Dr. Chi's Part D claims by kind of drug, 2024
- Generic304 claims99%
- Brand-name and other3 claims1%
Dr. Chi'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. Chi's Part D claims, 2024
- Opioids55%168 of 307 claims
- Antibiotics44%136 of 307 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: 3542024: 29218%
Drugs named by CMS: 2 in 2024, 4 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. Ying Chi ranks in the 94th percentile for melanoma (skin cancer) excision in Medicare
Dr. Chi accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 110 procedures of melanoma (skin cancer) excision by Dr. Chi, more than 94% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Chi ranks in Medicare procedure volume
- Melanoma (skin cancer) excision
- 94th percentile110 procedures
- Removal of tissue
- 62nd percentile11 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Ying Chi has 4 publications on record
Dmand AI links 4 papers to Dr. Chi, published from 2014 to 2018. Dr. Chi's most frequent co-author is Ephraim M. Zinberg, MD.
Papers4
Years published2014 to 2018
Dr. Chi's most frequent co-authors
Recent publications by Dr. Chi
ArthrodesisCarpal BonesLunate Bone
Ann Plast Surg
Head and Neck NeoplasmsMelanomaPlastic Surgery Procedures
See who Dr. Chi researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chi works with, so you can find a warm path to the right orthopaedic hand surgery physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Ying Chi received $320 in industry payments from 2016 to 2021
CMS Open Payments shows 7 general payments to Dr. Chi from 4 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 97% of the total. Merz North America, Inc. paid the most, $113.
General payments to Dr. Chi by program year, 2016 to 2021
General payments to Dr. Chi by kind, 2016 to 2021
$320in total
- Food and beverage$30997%
- Education$113%
Companies that paid Dr. Chi the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ying Chi has 5 awards and honors on record
Dmand AI lists 5 awards for Dr. Chi, most recently Basic Science Honors: Epidemiology, Urology, Precept-Surgery in 1999.
Awards and honors for Dr. Chi
- 1999
- Basic Science Honors: Epidemiology, Urology, Precept-Surgery
- Clinical Honors: Plastic Surgery, Surgery ICU, Burn ICU, Psychiatry, Radiology
- 1998
- Fitness Excellence Award
- Honor Graduate Combat EMT
- Honor Graduate Operating Room Specialist
Source: Dmand AI Professional Profile Data
Dr. Ying Chi graduated from University Of Washington School Of Medicine
Dr. Chi graduated from University Of Washington School Of Medicine in 2004. Dr. Chi is a member of AAOS and ASSH.
- Medical school
- Board certified in orthopaedic surgery
- Board certified in surgery of the hand
Source: Dmand AI Professional Profile Data
Dr. Ying Chi accepts plans from 9 insurance carriers
Dr. Chi is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- Humana
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- Regence Health Plans
- +1 more carriersWith a free account
Plan types Dr. Chi accepts, by number of carriers
- Medicare9
- PPO7
- HMO5
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Ying Chi'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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)Doctors and Clinicians Utilization Data (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. Ying Chi
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. Ying Chi's NPI number?
Dr. Ying Chi's NPI number is 1518178169. It was assigned on May 25, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ying Chi?
Dr. Ying Chi is an orthopaedic hand surgery physician in Fountain Valley, California. The primary specialty in the NPI Registry is Orthopaedic Hand Surgery Physician (taxonomy code 207XS0106X).
Where does Dr. Ying Chi practice?
Dr. Chi practices at 11190 Warner Ave, Fountain Valley, CA 92708. Dr. Chi's primary practice is Fountain Valley Regional Hospital - Outpatient Surgery Center in Fountain Valley, California. Dmand AI also links Dr. Chi to 1 physician office.
What is Dr. Ying Chi's office phone number?
The practice phone on file for Dr. Chi is (714) 427-0880.
What is Dr. Ying Chi's medical license number?
Dr. Chi holds California license A107272, one of the licenses on file in 3 states.
Which states has Dr. Ying Chi been licensed in?
Dmand AI has state licenses on file for Dr. Chi in California (2009 to 2027), Ohio (2010 to 2013) and Michigan (2005 to 2009).
Which hospitals is Dr. Ying Chi affiliated with?
Dr. Chi is affiliated with Hoag Hospital Newport Beach.
Does Dr. Ying Chi accept Medicare?
Yes. CMS data shows Dr. Chi billed Medicare for 1,349 services in 2024, and Dr. Chi accepts Medicare assignment.
How many Medicare patients does Dr. Ying Chi see?
CMS counts 130 Medicare patients who saw Dr. Chi in 2024, with an average age of 74.
Is Dr. Ying Chi board certified?
Yes. Dr. Chi is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery.
Show 8 more questionsShow fewer questions
What services does Dr. Ying Chi bill to Medicare?
In 2024, Dr. Chi's most billed Medicare services were office visit, new patient (99204), surgery: bones and joints (26440) and diagnostic imaging (73110).
Where did Dr. Ying Chi go to medical school?
Dr. Chi graduated from University Of Washington School Of Medicine in 2004.
What drugs does Dr. Ying Chi prescribe most?
In 2024 Medicare Part D data, Dr. Chi's most prescribed drugs by claims were Tramadol HCl and Cephalexin.
Has Dr. Ying Chi received payments from drug or device companies?
CMS Open Payments shows $320 in general payments to Dr. Chi from 4 companies from 2016 to 2021. The largest total came from Merz North America, Inc.
How long has Dr. Ying Chi been practicing?
Dr. Chi graduated from medical school in 2004, 22 years ago.
Does Dr. Ying Chi do research?
Dmand AI links 4 publications to Dr. Chi, published from 2014 to 2018.
Who does Dr. Ying Chi publish with?
Dr. Chi's most frequent co-authors are Ephraim M. Zinberg, MD (1 shared paper).
What insurance does Dr. Ying Chi accept?
Dr. Chi is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
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