Dr. Hyo Sook Ryu , DMD, MSD
Dentist - General Practice • Boston, MA
1 Kneeland St
Boston, MA 021111527
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Hyo Sook Ryu is listed in NPPES under Dentist - General Practice.
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NPI assigned on July 12, 2010; this date does not establish years in practice.
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Published CMS data list 261 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Triazolam — 140 prescription fills, including refills.
- Midazolam Hcl — 85 prescription fills, including refills.
- Lorazepam — 36 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 90% of clinicians listed under Dentist - General Practice in Boston, MA (2024, 98 clinicians with data). Median for this group: 36. Middle half: 18 to 80.
More Part D prescriptions than 95% of clinicians listed under Dentist - General Practice in Massachusetts (2024, 1,480 clinicians with data). Median for this group: 35. Middle half: 21 to 71.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 189 in 2020 to 261 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
1 Kneeland St
Boston, MA 021111527
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Newton, MA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Dentist - General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
261 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$1,592 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
NPI first issued
2010
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Boston and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 90% of clinicians listed under Dentist - General Practice in Boston, MA (2024, 98 clinicians with data). Median for this group: 36. Middle half: 18 to 80.
More Part D prescriptions than 95% of clinicians listed under Dentist - General Practice in Massachusetts (2024, 1,480 clinicians with data). Median for this group: 35. Middle half: 21 to 71.
Part D drug cost
A higher Part D drug cost than 90% of clinicians listed under Dentist - General Practice in Boston, MA (2024, 98 clinicians with data). Median for this group: $113. Middle half: $48 to $332.
A higher Part D drug cost than 95% of clinicians listed under Dentist - General Practice in Massachusetts (2024, 1,480 clinicians with data). Median for this group: $106. Middle half: $51 to $254.
392 active clinicians are listed under Dentist - General Practice with a practice address in Boston, MA (3,491 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Boston
0% of these 392 clinicians have the CMS telehealth indicator.
0.5% of these 392 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 38% from 189 in 2020 to 261 in 2024.
- 2020: 189
- 2021: 172
- 2022: 189
- 2023: 267
- 2024: 261
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30-day fills
30-day fills increased 38% from 189 in 2020 to 261 in 2024.
- 2020: 189
- 2021: 172
- 2022: 189
- 2023: 267
- 2024: 261
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Part D drug cost
Part D drug cost increased 15% from $1,384 in 2020 to $1,592 in 2024.
- 2020: $1,384
- 2021: $1,105
- 2022: $1,179
- 2023: $1,695
- 2024: $1,592
Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Triazolam | Triazolam | 140 | 146 | $772.88 | 39 |
| Midazolam Hcl | Midazolam Hcl | 85 | 85 | $672.22 | 33 |
| Lorazepam | Lorazepam | 36 | 40 | $146.56 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-05-12NUCC Taxonomy Code: 1223G0001X
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
Secondary Practice Locations
188 Needham St
Newton, MA 024641596
Phone: 8572997500
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Dentist - Prosthodontics
Doctor of Dental Surgery
Dentist - Periodontics
Doctor of Dental Surgery
Dentist
Doctor of Dental Medicine
Dentist
Dentist - Periodontics
Doctor of Dental Medicine
Dentist
Doctor of Dental Surgery
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Dentist (license number reported to NPPES: MA DN1855809)
Registered at 1 KNEELAND ST, BOSTON, MA 021111527 (Tel: 6176366888)
Registered at 62 BOYLSTON ST APT 416, BOSTON, MA 021164796
Recorded as HYO SOOK RYU, D.M.D., M.S.D.
NPI status registered as active in NPPES database
Registered at 1714 BURRSTONE RD, NEW HARTFORD, NY 134131002 (Tel: 3156246227)
Registered at 1714 BURRSTONE RD, NEW HARTFORD, NY 134131002 (Tel: 3156246227)
Recorded as HYO RYU, D.M.D.
Student in an Organized Health Care Education/Training Program (license number reported to NPPES: None NONE)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Dentist - General Practices in Boston
- Dr. Joseph Nore, DMD
- Dr. Matthew Ginsburg, DMD
- Dr. Wilson Hsin, DMD
- Dr. Anna Duong, DDS
- Dr. Samvel Martirosyan, DMD
- Dr. Sangjea Lee, DMD
Mailing Address
62 Boylston St Apt 416
Boston, MA 021164796