Radiol Case Rep
Dr. David D. Chi, MD
NPI1881746428PAC ID1052440526
- Medicare services, 2024
- 631
- Medicare patients, 2026
- 408
- Part D claims, 2026
- 125
- Publications
- 1
- MIPS score, 2026
- 30
- Practice address
- 555 Marin Street Suite 270, Thousand Oaks, CA 91360
- Practice phone
- Call (805) 719-0244
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Advanced Digestive Center of Southern California
Surgery Center - Not Medicare-Certified · Thousand Oaks, California
Find Dr. Chi'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. David D. Chi is a general surgeon in Thousand Oaks, California
Dr. Chi practices at Advanced Digestive Center of Southern California in Thousand Oaks, California.
Dr. Chi's NPI, 1881746428, was assigned on January 16, 2007. Dr. Chi graduated from David Geffen School of Medicine at UCLA in 1990. Dr. Chi holds California license G84570.
NPI and contact details
- NPI
- 1881746428NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1052440526
- NPI enumeration date
- January 16, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 719-0244
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David D. Chi practices at Advanced Digestive Center of Southern California in Thousand Oaks, California
Dr. Chi's primary practice is Advanced Digestive Center of Southern California, at 555 Marin Street Suite 270, Thousand Oaks, CA 91360. The practice phone is (805) 719-0244.
- Advanced Digestive Center of Southern California555 Marin Street Suite 270, Thousand Oaks, CA 91360Phone(805) 719-0244
Source: Dmand AI Affiliation Data
Dr. David D. Chi is affiliated with 5 sites of care and 1 medical group
Dr. Chi's primary practice is Advanced Digestive Center of Southern California in Thousand Oaks, California. Dr. Chi is also affiliated with Los Robles Regional Medical Center. The medical group on file is UCLA Associated General Surgeons. Dmand AI also links Dr. Chi to 1 more hospital, 1 physician office and 1 home health agency, each named with a free account.
Advanced Digestive Center of Southern CaliforniaPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. David D. Chi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chi practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Advanced Digestive Center of Southern California | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Chi practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. David D. Chi is one of 2,926 general surgeons in California
Surgery is Dr. Chi's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Chi is board certified in surgery by the American Board of Surgery. Dr. Chi is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists abdominal hernia repair surgery, appendectomy, breast reconstruction, cancerous skin growth removal, colon removal, gallbladder removal, groin hernia surgery and mastectomy among the conditions Dr. Chi treats.
General surgeons near Dr. Chi
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
2,926general surgeons in California
6general surgeons in Thousand Oaks
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. David D. Chi billed Medicare for 631 services in 2024
CMS data shows 631 Medicare services from Dr. Chi across 8 procedure codes in 2024, for 408 Medicare patients. Medicare paid $70,819 for them.
Medicare services, 2024631
Medicare patients408
Paid by Medicare$70,819
Procedure codes8
Dr. Chi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5412024: 5858%
- Surgery
- 2023: 492024: 466%
Where Dr. Chi's Medicare services took place, 2024
- In an office55588%
- In a facility7612%
Dr. Chi compared with the California median for general surgeons, 2024
- Dr. Chi
- California median
- Medicare services
- 631vs 1663.8 times
- Medicare patients
- 408vs 1213.4 times
- Part D claims
- 79vs 342.3 times
Medians across 2,606 general surgeons 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 general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David D. Chi treated 408 Medicare patients in 2026, average age 76
CMS counts 408 Medicare patients who saw Dr. Chi in 2026. The largest group is 65 to 74, with 180 patients. 75% of them have high cholesterol, and 70% have high blood pressure. Their average risk score is 1.13, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chi's median patient age at 74, with 58% women.
Medicare patients, 2026408
Average age76
Average risk score1.13
Dr. Chi's Medicare patients by age, 2026
CMS leaves out age groups with fewer than 11 patients.
Dr. Chi's Medicare patients by sex, 2026
- Women26866%
- Men14034%
Chronic conditions among Dr. Chi's Medicare patients, 2026
- High cholesterol75%
- High blood pressure70%
- Arthritis54%
- Cancer53%
- Ischemic heart disease31%
- Osteoporosis25%
- Anxiety23%
- Atrial fibrillation22%
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 74
Patient panel by sex, all payers
- Women58%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2026 data
Dr. David D. Chi wrote 125 Medicare Part D claims in 2026
In 2026, Dr. Chi wrote 125 Medicare Part D claims for 91 patients. 99% of them were for generic drugs. CMS names the drug for 79 of them, across 1 drug with 11 or more claims each, at $640 in total drug cost. In 2023, CMS named 76 claims across 1 drug.
Part D claims, 2026125
Drugs named by CMS1
Total drug cost$640
Part D patients91
Dr. Chi's Part D claims by kind of drug, 2026
- Generic124 claims99%
- Brand-name and other1 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, 2026
- Opioids65%81 of 125 claims
- Antibiotics18%23 of 125 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: 762024: 794%
Drugs named by CMS: 1 in 2024, 1 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), 2026 data
Dr. David D. Chi scored 30 out of 100 in Medicare's MIPS program for 2026
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 30 out of 100 for Dr. Chi for performance year 2026, reported individually. Dr. Chi accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 53 procedures of hernia repair - groin (open) by Dr. Chi, more than 99% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Chi's MIPS scores, performance year 2026
- 30of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 100of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Chi ranks in Medicare procedure volume
- Hernia repair - groin (open)
- 99th percentile53 procedures
- Mastectomy
- 66th percentile12 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2026 data; and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Find general surgeons like Dr. Chi by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. David D. Chi has 1 publication on record
Dmand AI links 1 paper to Dr. Chi in 2015. Dr. Chi's most frequent co-authors are Roy Gottlieb, DO and Rukhsana Mohamedali Serang, DO.
Papers1
Dr. Chi's most frequent co-authors
Recent publications by Dr. Chi
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 general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. David D. Chi received $7,438 in industry payments from 2016 to 2025
CMS Open Payments shows 56 general payments to Dr. Chi from 20 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 60% of the total. Intuitive Surgical, Inc. paid the most, $3,871.
General payments to Dr. Chi by program year, 2016 to 2025
General payments to Dr. Chi by kind, 2016 to 2025
$7.4Kin total
- Food and beverage$4,43860%
- Education$3,00040%
Companies that paid Dr. Chi the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. David D. Chi has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Chi, most recently CMS Stage 1 2012 in 2011. Dr. Chi serves on Board of Directors American Cancer Society, Board of Govenors Specialty Surgery and Department or Surgery.
Awards and honors for Dr. Chi
- 2011
- CMS Stage 1 2012
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. David D. Chi graduated from David Geffen School of Medicine at UCLA
Dr. Chi graduated from David Geffen School of Medicine at UCLA in 1990. Dr. Chi is a member of ACS, ASBS and SSO.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. David D. Chi accepts plans from 15 insurance carriers
Dr. Chi is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Humana
- Regence Health Plans
- +7 more carriersWith a free account
Plan types Dr. Chi accepts, by number of carriers
- PPO10
- Medicare8
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. David D. 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 | 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) |
| 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)Clinician Public Reporting: Overall MIPS Performance (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. David D. 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. David D. Chi's NPI number?
Dr. David D. Chi's NPI number is 1881746428. It was assigned on January 16, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. David D. Chi?
Dr. David D. Chi is a general surgeon in Thousand Oaks, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. David D. Chi practice?
Dr. Chi practices at 555 Marin Street Suite 270, Thousand Oaks, CA 91360. Dr. Chi's primary practice is Advanced Digestive Center of Southern California in Thousand Oaks, California. Dmand AI also links Dr. Chi to 1 hospital, 1 physician office and 1 home health agency, and a free account names each one.
What is Dr. David D. Chi's office phone number?
The practice phone on file for Dr. Chi is (805) 719-0244. Dmand AI also checks direct phone and mobile numbers, available with a free account.
What is Dr. David D. Chi's email address?
Dmand AI checks professional and personal email addresses for Dr. Chi through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Dr. David D. Chi's medical license number?
Dr. Chi holds California license G84570.
Which hospitals is Dr. David D. Chi affiliated with?
Dr. Chi is affiliated with Los Robles Regional Medical Center. Dmand AI links Dr. Chi to 1 more hospital, named with a free account.
What medical group is Dr. David D. Chi part of?
Dr. Chi is linked to UCLA Associated General Surgeons.
Who does Dr. David D. Chi practice with?
Dmand AI links 58 HCPs to Dr. Chi's primary medical group, 32 of them general surgeons. A free account lists them, with verified contacts.
Does Dr. David D. Chi accept Medicare?
Yes. CMS data shows Dr. Chi billed Medicare for 631 services in 2024, and Dr. Chi accepts Medicare assignment.
Show 12 more questionsShow fewer questions
What is Dr. David D. Chi's MIPS score?
Dr. Chi's MIPS final score for performance year 2026 is 30 out of 100, reported individually.
How many Medicare patients does Dr. David D. Chi see?
CMS counts 408 Medicare patients who saw Dr. Chi in 2026, with an average age of 76.
Is Dr. David D. Chi board certified?
Yes. Dr. Chi is board certified in surgery by the American Board of Surgery.
What services does Dr. David D. Chi bill to Medicare?
In 2024, Dr. Chi's most billed Medicare services were office visit, established patient (99213), office visit, new patient (99204) and office visit, established patient (99214).
Where did Dr. David D. Chi go to medical school?
Dr. Chi graduated from David Geffen School of Medicine at UCLA in 1990.
What drugs does Dr. David D. Chi prescribe most?
In 2024 Medicare Part D data, Dr. Chi's most prescribed drugs by claims were Hydrocodone-Acetaminophen.
Has Dr. David D. Chi received payments from drug or device companies?
CMS Open Payments shows $7,438 in general payments to Dr. Chi from 20 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. David D. Chi been practicing?
Dr. Chi graduated from medical school in 1990, 36 years ago.
Does Dr. David D. Chi do research?
Dmand AI links 1 publication to Dr. Chi.
Who does Dr. David D. Chi publish with?
Dr. Chi's most frequent co-authors are Roy Gottlieb, DO (1 shared paper) and Rukhsana Mohamedali Serang, DO (1 shared paper).
What EHR does Dr. David D. Chi's practice use?
Dmand AI tracks the EHR system at Advanced Digestive Center of Southern California and at 4 more affiliated sites. The vendor and product are available with a free Dmand AI account.
What insurance does Dr. David D. Chi accept?
Dr. Chi is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit. The full carrier list is available with a free Dmand AI account.
Selling to surgery practices?
See general surgeons in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card