Dr. Thomas Ka Shun Tan, MD
- Medicare services, 2024
- 2,619
- Medicare patients, 2024
- 200
- Part D claims, 2024
- 9,453
- Hospital affiliations
- 4
- Industry payments
- $35,889
- Practice address
- 420 Kuwili St, Honolulu, HI 96817
- Practice phone
- Call (808) 536-9326
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Thomas K S Tan M D Inc
Honolulu, Hawaii
Find Dr. Tan'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. Thomas Ka Shun Tan is an internist in Honolulu, Hawaii
Dr. Tan practices at Thomas K S Tan M D Inc in Honolulu, Hawaii.
Dr. Tan's NPI, 1447328620, was assigned on December 4, 2006. Dr. Tan graduated from University of Hawaii John A. Burns School of Medicine in 1994. Dr. Tan holds Hawaii license MD9783.
- NPI
- 1447328620NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254354475
- NPI enumeration date
- December 4, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (808) 536-9326
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas Ka Shun Tan practices at Thomas K S Tan M D Inc in Honolulu, Hawaii
Dr. Tan's primary practice is Thomas K S Tan M D Inc, at 420 Kuwili St, Honolulu, HI 96817 in Honolulu County. The practice phone is (808) 536-9326.
- Thomas K S Tan M D Inc420 Kuwili St, Honolulu, HI 96817 · Honolulu CountyPhone(808) 536-9326
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Thomas Ka Shun Tan is affiliated with 7 sites of care
Dr. Tan's primary practice is Thomas K S Tan M D Inc in Honolulu, Hawaii. Dr. Tan is also affiliated with The Queen's Medical Center. Dmand AI also links Dr. Tan to 3 more hospitals, 1 physician office and 1 home health agency, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thomas Ka Shun Tan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tan practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Thomas K S Tan M D Inc | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas Ka Shun Tan is one of 771 internists in Hawaii
Internal medicine is Dr. Tan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Tan is licensed in Hawaii.
Specialties and state licenses
- Internal medicine, HawaiiPrimary
Internists near Dr. Tan
Counts of internists 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. Thomas Ka Shun Tan billed Medicare for 2,619 services in 2024
CMS data shows 2,619 Medicare services from Dr. Tan across 9 procedure codes in 2024, for 200 Medicare patients. Medicare paid $179,592 for them. Every service was in an office.
Dr. Tan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,4562024: 1,5829%
- Other services
- 2023: 2232024: 966333%
- Tests and treatments
- 2023: 762024: 717%
Dr. Tan compared with the Hawaii median for internists, 2024
- Dr. Tan
- Hawaii median
- Medicare services
- 2,619vs 3427.7 times
- Medicare patients
- 200vs 12856% above
- Part D claims
- 8,878vs 67013.3 times
Medians across 699 internists in Hawaii with Dmand AI profiles that report each measure.
Dr. Tan'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. Tan and other internists in Hawaii.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas Ka Shun Tan treated 200 Medicare patients in 2024, average age 78
CMS counts 200 Medicare patients who saw Dr. Tan in 2024. The largest group is 75 to 84, with 79 patients. 75% of them have arthritis, and 75% have diabetes. 7% are also on Medicaid. Their average risk score is 1.26, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Tan's median patient age at 72, with 52% women.
Dr. Tan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Tan's Medicare patients by sex, 2024
- Women10251%
- Men9849%
Chronic conditions among Dr. Tan's Medicare patients, 2024
- Arthritis75%
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease37%
- Osteoporosis31%
- Ischemic heart disease21%
- Atrial fibrillation20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women52%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Ka Shun Tan wrote 9,453 Medicare Part D claims in 2024
In 2024, Dr. Tan wrote 9,453 Medicare Part D claims for 633 patients. 82% of them were for generic drugs. CMS names the drug for 8,878 of them, across 115 drugs with 11 or more claims each, at $1,820,856 in total drug cost. In 2023, CMS named 9,100 claims across 121 drugs.
Dr. Tan's Part D claims by kind of drug, 2024
- Generic7,717 claims82%
- Brand-name1,670 claims18%
- Other66 claims1%
Dr. Tan'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. Tan's Part D claims, 2024
- Antibiotics3%304 of 9,453 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: 9,1002024: 8,8782%
Drugs named by CMS: 115 in 2024, 121 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. Thomas Ka Shun Tan offers telehealth to Medicare patients
Dr. Tan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Tan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Thomas Ka Shun Tan received $35,889 in industry payments from 2016 to 2025
CMS Open Payments shows 1,441 general payments to Dr. Tan from 42 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Amarin Pharma Inc. paid the most, $7,405.
General payments to Dr. Tan by program year, 2016 to 2025
General payments to Dr. Tan by kind, 2016 to 2025
- Food and beverage$35,17498%
- Education$7152%
Companies that paid Dr. Tan 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. Thomas Ka Shun Tan graduated from University of Hawaii John A. Burns School of Medicine
Dr. Tan graduated from University of Hawaii John A. Burns School of Medicine in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas Ka Shun Tan'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) |
| 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. Thomas Ka Shun Tan
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. Thomas Ka Shun Tan's NPI number?
Dr. Thomas Ka Shun Tan's NPI number is 1447328620. It was assigned on December 4, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Ka Shun Tan?
Dr. Thomas Ka Shun Tan is an internist in Honolulu, Hawaii. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Thomas Ka Shun Tan practice?
Dr. Tan practices at 420 Kuwili St, Honolulu, HI 96817. Dr. Tan's primary practice is Thomas K S Tan M D Inc in Honolulu, Hawaii. Dmand AI also links Dr. Tan to 3 hospitals, 1 physician office and 1 home health agency.
What is Dr. Thomas Ka Shun Tan's office phone number?
The practice phone on file for Dr. Tan is (808) 536-9326.
What is Dr. Thomas Ka Shun Tan's medical license number?
Dr. Tan holds Hawaii license MD9783.
Which hospitals is Dr. Thomas Ka Shun Tan affiliated with?
Dr. Tan is affiliated with The Queen's Medical Center. Dmand AI links Dr. Tan to 3 more hospitals.
Does Dr. Thomas Ka Shun Tan accept Medicare?
Yes. CMS data shows Dr. Tan billed Medicare for 2,619 services in 2024, and Dr. Tan accepts Medicare assignment.
Does Dr. Thomas Ka Shun Tan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Tan as offering telehealth services.
How many Medicare patients does Dr. Thomas Ka Shun Tan see?
CMS counts 200 Medicare patients who saw Dr. Tan in 2024, with an average age of 78.
What services does Dr. Thomas Ka Shun Tan bill to Medicare?
In 2024, Dr. Tan's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and office visit, established patient (99213).
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Where did Dr. Thomas Ka Shun Tan go to medical school?
Dr. Tan graduated from University of Hawaii John A. Burns School of Medicine in 1994.
What drugs does Dr. Thomas Ka Shun Tan prescribe most?
In 2024 Medicare Part D data, Dr. Tan's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
Has Dr. Thomas Ka Shun Tan received payments from drug or device companies?
CMS Open Payments shows $35,889 in general payments to Dr. Tan from 42 companies from 2016 to 2025. The largest total came from Amarin Pharma Inc.
How long has Dr. Thomas Ka Shun Tan been practicing?
Dr. Tan graduated from medical school in 1994, 32 years ago.
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