Dr. Hyon-Kyoo Choi, MD, PhD
- Medicare services, 2024
- 63
- Medicare patients, 2024
- 65
- Part D claims, 2024
- 214
- Hospital affiliations
- 3
- Industry payments
- $84,564
- Practice address
- 55 Fruit Street, Boston, MA 02114
- Practice phone
- Call (617) 726-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Choi'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. Hyon-Kyoo Choi is a rheumatologist in Boston, Massachusetts
Dr. Choi practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Choi's NPI, 1629157128, was assigned on November 3, 2006. Dr. Choi holds Massachusetts license 79165.
- NPI
- 1629157128NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4284612045
- NPI enumeration date
- November 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (617) 726-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Hyon-Kyoo Choi practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Choi's primary practice is Massachusetts General Hospital, at 55 Fruit Street, Boston, MA 02114 in Suffolk County. The practice phone is (617) 726-2000.
- Massachusetts General Hospital55 Fruit Street, Boston, MA 02114 · Suffolk CountyPhone(617) 726-2000
Source: Dmand AI Affiliation Data
Dr. Hyon-Kyoo Choi is affiliated with 7 sites of care and 3 medical groups
Dr. Choi's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Choi is also affiliated with Salem Hospital. The medical group on file is Massachusetts General Hospital. Dmand AI also links Dr. Choi to 1 more hospital, 3 group practices and clinics, 2 medical groups and 1 community health center, each named with a free account. Dr. Choi's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Hyon-Kyoo Choi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Choi practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Massachusetts General Hospital | Available with a free account |
| +6 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Hyon-Kyoo Choi is one of 275 rheumatologists in Massachusetts
Rheumatology is Dr. Choi's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Choi is licensed in Massachusetts.
Specialties and state licenses
- Rheumatology, MassachusettsPrimary
Rheumatologists near Dr. Choi
Counts of rheumatologists 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. Hyon-Kyoo Choi billed Medicare for 63 services in 2024
CMS data shows 63 Medicare services from Dr. Choi across 1 procedure code in 2024, all of them office visits, for 65 Medicare patients. Medicare paid $5,097 for them.
Dr. Choi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 642024: 632%
Where Dr. Choi's Medicare services took place, 2024
- In an office2641%
- In a facility3759%
Dr. Choi compared with the Massachusetts median for rheumatologists, 2024
- Dr. Choi
- Massachusetts median
- Medicare services
- 63vs 41285% below
- Medicare patients
- 65vs 20969% below
- Part D claims
- 154vs 50570% below
Medians across 268 rheumatologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Choi'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Hyon-Kyoo Choi treated 65 Medicare patients in 2024, average age 74
CMS counts 65 Medicare patients who saw Dr. Choi in 2024. The largest group is 65 to 74, with 31 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.50, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Choi's median patient age at 71, with 55% women.
Dr. Choi's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Choi's Medicare patients by sex, 2024
- Women2945%
- Men3655%
Chronic conditions among Dr. Choi's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis66%
- Ischemic heart disease43%
- Chronic kidney disease42%
- Atrial fibrillation37%
- Heart failure35%
- Anxiety32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Choi'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
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Hyon-Kyoo Choi wrote 214 Medicare Part D claims in 2024
In 2024, Dr. Choi wrote 214 Medicare Part D claims for 50 patients. 88% of them were for generic drugs. CMS names the drug for 154 of them, across 6 drugs with 11 or more claims each, at $46,761 in total drug cost. In 2023, CMS named 115 claims across 4 drugs.
Dr. Choi's Part D claims by kind of drug, 2024
- Generic189 claims88%
- Brand-name25 claims12%
Dr. Choi'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1152024: 15434%
Drugs named by CMS: 6 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. Hyon-Kyoo Choi offers telehealth to Medicare patients
Dr. Choi accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Choi as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Hyon-Kyoo Choi received $84,564 in industry payments from 2016 to 2025
CMS Open Payments shows 90 general payments to Dr. Choi from 8 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 64% of the total. Takeda Pharmaceuticals U.S.A., Inc. paid the most, $36,656. It also lists 5 research payments totaling $10,749 from 2024 to 2025.
General payments to Dr. Choi by program year, 2016 to 2025
General payments to Dr. Choi by kind, 2016 to 2025
- Consulting fees$53,88864%
- Honoraria$24,69329%
- Travel and lodging$4,0805%
- Food and beverage$1,7872%
- Education$1160%
Companies that paid Dr. Choi the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Hyon-Kyoo Choi'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Hyon-Kyoo Choi
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. Hyon-Kyoo Choi's NPI number?
Dr. Hyon-Kyoo Choi's NPI number is 1629157128. It was assigned on November 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Hyon-Kyoo Choi?
Dr. Hyon-Kyoo Choi is a rheumatologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Hyon-Kyoo Choi practice?
Dr. Choi practices at 55 Fruit Street, Boston, MA 02114. Dr. Choi's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Choi to 1 hospital, 3 group practices and clinics, 2 medical groups and 1 community health center.
What is Dr. Hyon-Kyoo Choi's office phone number?
The practice phone on file for Dr. Choi is (617) 726-2000.
What is Dr. Hyon-Kyoo Choi's medical license number?
Dr. Choi holds Massachusetts license 79165.
Which hospitals is Dr. Hyon-Kyoo Choi affiliated with?
Dr. Choi practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Choi is also affiliated with Salem Hospital. Dmand AI links Dr. Choi to 1 more hospital.
What medical group is Dr. Hyon-Kyoo Choi part of?
Dr. Choi is linked to Massachusetts General Hospital. Dmand AI links Dr. Choi to 2 more medical groups.
Does Dr. Hyon-Kyoo Choi accept Medicare?
Yes. CMS data shows Dr. Choi billed Medicare for 63 services in 2024, and Dr. Choi accepts Medicare assignment.
Does Dr. Hyon-Kyoo Choi offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Choi as offering telehealth services.
How many Medicare patients does Dr. Hyon-Kyoo Choi see?
CMS counts 65 Medicare patients who saw Dr. Choi in 2024, with an average age of 74.
Show 4 more questionsShow fewer questions
What services does Dr. Hyon-Kyoo Choi bill to Medicare?
In 2024, Dr. Choi's most billed Medicare services were office visit, established patient (99214).
What drugs does Dr. Hyon-Kyoo Choi prescribe most?
In 2024 Medicare Part D data, Dr. Choi's most prescribed drugs by claims were Allopurinol, Prednisone and Hydroxychloroquine Sulfate.
Has Dr. Hyon-Kyoo Choi received payments from drug or device companies?
CMS Open Payments shows $84,564 in general payments to Dr. Choi from 8 companies from 2016 to 2025. The largest total came from Takeda Pharmaceuticals U.S.A., Inc.
How long has Dr. Hyon-Kyoo Choi been practicing?
Dr. Choi graduated from medical school in 1986, 40 years ago.
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