Dr. Patrick T. Koo, MD
- Medicare services, 2024
- 1,306
- Medicare patients, 2024
- 512
- Part D claims, 2024
- 1,246
- Hospital affiliations
- 2
- Industry payments
- $9,266
- Practice address
- 101 E. Valencia Mesa Drive, Fullerton, CA 92835
- Practice phone
- Call (714) 578-8706
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St. Jude Medical Center - Unit
Acute Care Hospital-Unit · Fullerton, California
Find Dr. Koo'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. Patrick T. Koo is a gastroenterologist in Fullerton, California
Dr. Koo practices at St. Jude Medical Center - Unit in Fullerton, California.
Dr. Koo's NPI, 1801152772, was assigned on April 5, 2012. Dr. Koo graduated from Pennsylvania State University College of Medicine in 2012. Dr. Koo holds California license A136521.
- NPI
- 1801152772NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8921302977
- NPI enumeration date
- April 5, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (714) 578-8706
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Patrick T. Koo practices at St. Jude Medical Center - Unit in Fullerton, California
Dr. Koo's primary practice is St. Jude Medical Center - Unit, at 101 E. Valencia Mesa Drive, Fullerton, CA 92835 in Orange County. The practice phone is (714) 578-8706.
- St. Jude Medical Center - Unit101 E. Valencia Mesa Drive, Fullerton, CA 92835 · Orange CountyPhone(714) 578-8706
Source: Dmand AI Affiliation Data
Dr. Patrick T. Koo is affiliated with 3 sites of care and 1 medical group
Dr. Koo's primary practice is St. Jude Medical Center - Unit in Fullerton, California. Dr. Koo is also affiliated with Providence St. Jude Medical Center. The medical group on file is St. Jude Heritage Medical Group. Dmand AI also links Dr. Koo to 1 more group practice or clinic, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Patrick T. Koo's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Koo practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. Jude Medical Center - Unit | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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. Patrick T. Koo is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Koo's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Koo is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Koo
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. Patrick T. Koo billed Medicare for 1,306 services in 2024
CMS data shows 1,306 Medicare services from Dr. Koo across 21 procedure codes in 2024, for 512 Medicare patients. Medicare paid $134,020 for them.
Dr. Koo's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5672024: 5208%
- Surgery
- 2023: 3622024: 48534%
- Other services
- 2023: 1112024: 268141%
- Tests and treatments
- 2023: 312024: 336%
Where Dr. Koo's Medicare services took place, 2024
- In an office40731%
- In a facility89969%
Dr. Koo compared with the California median for gastroenterologists, 2024
- Dr. Koo
- California median
- Medicare services
- 1,306vs 5862.2 times
- Medicare patients
- 512vs 30270% above
- Part D claims
- 1,030vs 3802.7 times
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Koo'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. Koo?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Koo and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Patrick T. Koo treated 512 Medicare patients in 2024, average age 75
CMS counts 512 Medicare patients who saw Dr. Koo in 2024. The largest group is 65 to 74, with 266 patients. 75% of them have high cholesterol, and 72% have high blood pressure. 18% 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. Koo's median patient age at 65, with 56% women.
Dr. Koo's Medicare patients by age, 2024
Dr. Koo's Medicare patients by sex, 2024
- Women28556%
- Men22744%
Chronic conditions among Dr. Koo's Medicare patients, 2024
- High cholesterol75%
- High blood pressure72%
- Arthritis52%
- Diabetes36%
- Chronic kidney disease30%
- Osteoporosis29%
- Ischemic heart disease28%
- Heart failure23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Koo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Patrick T. Koo wrote 1,246 Medicare Part D claims in 2024
In 2024, Dr. Koo wrote 1,246 Medicare Part D claims for 427 patients. 85% of them were for generic drugs. CMS names the drug for 1,030 of them, across 25 drugs with 11 or more claims each, at $658,332 in total drug cost. In 2023, CMS named 1,028 claims across 25 drugs.
Dr. Koo's Part D claims by kind of drug, 2024
- Generic1,060 claims85%
- Brand-name186 claims15%
Dr. Koo'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. Koo's Part D claims, 2024
- Antibiotics7%91 of 1,246 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: 1,0282024: 1,030No change
Drugs named by CMS: 25 in 2024, 25 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. Patrick T. Koo ranks in the 91st percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Koo accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Koo as offering telehealth. CMS counts 207 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Koo, more than 91% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Koo ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 91st percentile207 procedures
- Colonoscopy
- 86th percentile133 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Patrick T. Koo received $9,266 in industry payments from 2016 to 2025
CMS Open Payments shows 555 general payments to Dr. Koo from 30 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $2,330.
General payments to Dr. Koo by program year, 2016 to 2025
Companies that paid Dr. Koo 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. Patrick T. Koo graduated from Pennsylvania State University College of Medicine
Dr. Koo graduated from Pennsylvania State University College of Medicine in 2012.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Patrick T. Koo'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 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 |
| 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. Patrick T. Koo
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. Patrick T. Koo's NPI number?
Dr. Patrick T. Koo's NPI number is 1801152772. It was assigned on April 5, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Patrick T. Koo?
Dr. Patrick T. Koo is a gastroenterologist in Fullerton, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Patrick T. Koo practice?
Dr. Koo practices at 101 E. Valencia Mesa Drive, Fullerton, CA 92835. Dr. Koo's primary practice is St. Jude Medical Center - Unit in Fullerton, California. Dmand AI also links Dr. Koo to 1 group practice or clinic.
What is Dr. Patrick T. Koo's office phone number?
The practice phone on file for Dr. Koo is (714) 578-8706.
What is Dr. Patrick T. Koo's medical license number?
Dr. Koo holds California license A136521.
Which hospitals is Dr. Patrick T. Koo affiliated with?
Dr. Koo is affiliated with Providence St. Jude Medical Center. Dmand AI links Dr. Koo to 1 more hospital.
What medical group is Dr. Patrick T. Koo part of?
Dr. Koo is linked to St. Jude Heritage Medical Group.
Does Dr. Patrick T. Koo accept Medicare?
Yes. CMS data shows Dr. Koo billed Medicare for 1,306 services in 2024, and Dr. Koo accepts Medicare assignment.
Does Dr. Patrick T. Koo offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Koo as offering telehealth services.
How many Medicare patients does Dr. Patrick T. Koo see?
CMS counts 512 Medicare patients who saw Dr. Koo in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. Patrick T. Koo bill to Medicare?
In 2024, Dr. Koo's most billed Medicare services were medicare service (G0500), office visit, established patient (99214) and surgery: digestive system (43239).
Where did Dr. Patrick T. Koo go to medical school?
Dr. Koo graduated from Pennsylvania State University College of Medicine in 2012.
What drugs does Dr. Patrick T. Koo prescribe most?
In 2024 Medicare Part D data, Dr. Koo's most prescribed drugs by claims were Pantoprazole Sodium, Colestipol HCl and Omeprazole.
Has Dr. Patrick T. Koo received payments from drug or device companies?
CMS Open Payments shows $9,266 in general payments to Dr. Koo from 30 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Patrick T. Koo been practicing?
Dr. Koo graduated from medical school in 2012, 14 years ago.
Selling to gastroenterology practices?
See gastroenterologists 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