Dr. Chia Chi George Lai, MD
- Medicare services, 2024
- 8,035
- Medicare patients, 2024
- 1,228
- Part D claims, 2024
- 1,347
- Hospital affiliations
- 4
- Industry payments
- $37,714
- Practice address
- 525 N Garfield Ave, Monterey Park, CA 91754
- Practice phone
- Call (626) 573-2222
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Lai'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. Chia Chi George Lai is a gastroenterologist in Monterey Park, California
Dr. Lai practices at Garfield Medical Center in Monterey Park, California, part of AHMC Healthcare.
Dr. Lai's NPI, 1043238413, was assigned on July 17, 2006. Dr. Lai graduated from Taipei Medical University in 1981. Dr. Lai holds California license A42437.
- NPI
- 1043238413NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2466449913
- NPI enumeration date
- July 17, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (626) 573-2222
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Chia Chi George Lai practices at Garfield Medical Center in Monterey Park, California
Dr. Lai's primary practice is Garfield Medical Center, at 525 N Garfield Ave, Monterey Park, CA 91754 in Los Angeles County. The practice phone is (626) 573-2222.
- Garfield Medical Center525 N Garfield Ave, Monterey Park, CA 91754 · Los Angeles CountyPhone(626) 573-2222
Source: Dmand AI Affiliation Data
Dr. Chia Chi George Lai is affiliated with 5 sites of care
Dr. Lai's primary practice is Garfield Medical Center in Monterey Park, California, part of AHMC Healthcare. Dr. Lai is also affiliated with Alhambra Hospital Medical Center. Dmand AI also links Dr. Lai to 2 more hospitals and 1 physician office, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Chia Chi George Lai's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lai practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Garfield Medical Center | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Chia Chi George Lai is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Lai's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Lai is board certified in gastroenterology by the American Board of Internal Medicine. Dmand AI has Dr. Lai's licenses on file in 2 states: California and Illinois.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
- Illinois license
Clinical focus
Dmand AI lists acid reflux, acute gallbladder or bile duct inflammation, acute gastroduodenitis, chronic indigestion, cirrhosis of the liver, colonoscopy, electrolyte disorders and esophagus, stomach, or upper small intestine surgery among the conditions Dr. Lai treats.
Gastroenterologists near Dr. Lai
Counts of gastroenterologists 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. Chia Chi George Lai billed Medicare for 8,035 services in 2024
CMS data shows 8,035 Medicare services from Dr. Lai across 15 procedure codes in 2024, for 1,228 Medicare patients. Medicare paid $631,237 for them.
Dr. Lai's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6,6502024: 6,9374%
- Surgery
- 2023: 1,1212024: 1,0982%
Where Dr. Lai's Medicare services took place, 2024
- In an office1,36217%
- In a facility6,67383%
Dr. Lai compared with the California median for gastroenterologists, 2024
- Dr. Lai
- California median
- Medicare services
- 8,035vs 58613.7 times
- Medicare patients
- 1,228vs 3024.1 times
- Part D claims
- 1,240vs 3803.3 times
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Lai'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 Dr. Lai and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Chia Chi George Lai treated 1,228 Medicare patients in 2024, average age 79
CMS counts 1,228 Medicare patients who saw Dr. Lai in 2024. The largest group is 75 to 84, with 420 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 78% are also on Medicaid. Their average risk score is 2.37, 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. Lai's median patient age at 71, with 54% women.
Dr. Lai's Medicare patients by age, 2024
Dr. Lai's Medicare patients by sex, 2024
- Women72459%
- Men50441%
Chronic conditions among Dr. Lai's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes59%
- Chronic kidney disease57%
- Arthritis51%
- Ischemic heart disease50%
- Alzheimer's and dementia37%
- Osteoporosis37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lai's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Chia Chi George Lai wrote 1,347 Medicare Part D claims in 2024
In 2024, Dr. Lai wrote 1,347 Medicare Part D claims for 640 patients. 69% of them were for generic drugs. CMS names the drug for 1,240 of them, across 25 drugs with 11 or more claims each, at $846,720 in total drug cost. In 2023, CMS named 1,558 claims across 29 drugs.
Dr. Lai's Part D claims by kind of drug, 2024
- Generic932 claims69%
- Brand-name415 claims31%
Dr. Lai'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. Lai's Part D claims, 2024
- Antibiotics5%73 of 1,347 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: 1,5582024: 1,24020%
Drugs named by CMS: 25 in 2024, 29 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. Chia Chi George Lai ranks in the 99th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Lai accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Lai as offering telehealth. CMS counts 963 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Lai, more than 99% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Lai ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 99th percentile963 procedures
- Colonoscopy
- 99th percentile591 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. Chia Chi George Lai received $37,714 in industry payments from 2016 to 2025
CMS Open Payments shows 264 general payments to Dr. Lai from 16 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 61% of the total. Gilead Sciences, Inc. paid the most, $34,536.
General payments to Dr. Lai by program year, 2016 to 2025
General payments to Dr. Lai by kind, 2016 to 2025
- Speaker and faculty fees$23,04061%
- Consulting fees$8,22522%
- Food and beverage$5,46414%
- Travel and lodging$9783%
- Education$70%
Companies that paid Dr. Lai 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. Chia Chi George Lai graduated from Taipei Medical University
Dr. Lai graduated from Taipei Medical University in 1981.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Chia Chi George Lai accepts plans from 14 insurance carriers
Dr. Lai is in network with 14 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- LA Care
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- +6 more carriersWith a free account
Plan types Dr. Lai accepts, by number of carriers
- Medicare10
- PPO8
- HMO7
- POS5
- EPO3
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Chia Chi George Lai'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)Doctors and Clinicians Utilization Data (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 |
| 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. Chia Chi George Lai
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. Chia Chi George Lai's NPI number?
Dr. Chia Chi George Lai's NPI number is 1043238413. It was assigned on July 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Chia Chi George Lai?
Dr. Chia Chi George Lai is a gastroenterologist in Monterey Park, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Chia Chi George Lai practice?
Dr. Lai practices at 525 N Garfield Ave, Monterey Park, CA 91754. Dr. Lai's primary practice is Garfield Medical Center in Monterey Park, California, part of AHMC Healthcare. Dmand AI also links Dr. Lai to 2 hospitals and 1 physician office.
What is Dr. Chia Chi George Lai's office phone number?
The practice phone on file for Dr. Lai is (626) 573-2222.
What is Dr. Chia Chi George Lai's medical license number?
Dr. Lai holds California license A42437, one of the licenses on file in 2 states.
Which states has Dr. Chia Chi George Lai been licensed in?
Dmand AI has state licenses on file for Dr. Lai in California (1986 to 2027) and Illinois (1985 to 1990).
Which hospitals is Dr. Chia Chi George Lai affiliated with?
Dr. Lai practices at Garfield Medical Center in Monterey Park, California. Dr. Lai is also affiliated with Alhambra Hospital Medical Center. Dmand AI links Dr. Lai to 2 more hospitals.
Does Dr. Chia Chi George Lai accept Medicare?
Yes. CMS data shows Dr. Lai billed Medicare for 8,035 services in 2024, and Dr. Lai accepts Medicare assignment.
Does Dr. Chia Chi George Lai offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Lai as offering telehealth services.
How many Medicare patients does Dr. Chia Chi George Lai see?
CMS counts 1,228 Medicare patients who saw Dr. Lai in 2024, with an average age of 79.
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Is Dr. Chia Chi George Lai board certified?
Yes. Dr. Lai is board certified in gastroenterology by the American Board of Internal Medicine.
What services does Dr. Chia Chi George Lai bill to Medicare?
In 2024, Dr. Lai's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99222) and surgery: digestive system (43239).
Where did Dr. Chia Chi George Lai go to medical school?
Dr. Lai graduated from Taipei Medical University in 1981.
What drugs does Dr. Chia Chi George Lai prescribe most?
In 2024 Medicare Part D data, Dr. Lai's most prescribed drugs by claims were Gavilyte-G, Creon and Pantoprazole Sodium.
Has Dr. Chia Chi George Lai received payments from drug or device companies?
CMS Open Payments shows $37,714 in general payments to Dr. Lai from 16 companies from 2016 to 2025. The largest total came from Gilead Sciences, Inc.
How long has Dr. Chia Chi George Lai been practicing?
Dr. Lai graduated from medical school in 1981, 45 years ago.
What insurance does Dr. Chia Chi George Lai accept?
Dr. Lai is in network with 14 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
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