Dr. Ojin Kwon , DDS
Dentist - General Practice • Diamond Bar, CA
20657 Golden Springs Dr Ste 205b
Diamond Bar, CA 917893837
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. Ojin Kwon is listed in NPPES under Dentist - General Practice.
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NPI assigned on December 11, 2006; this date does not establish years in practice.
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Published CMS data list 134 Original Medicare Part B services in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Published rows only; this is not a quality measure.
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Published Part B service records, 2020:
- 40801 — Complicated drainage of abscess, cyst, or blood accumulation of mouth: 35 service units.
- 70355 — X-ray of lower jaws, upper jaws and teeth: 29 service units.
- 21208 — Incision and repair of bony defect of cheek bone with repositioning of bony segment: 20 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2019 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2020). CPT notice
See all 7 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 389 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:
- Amoxicillin — 157 prescription fills, including refills.
- Chlorhexidine Gluconate — 138 prescription fills, including refills.
- Ibuprofen — 83 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 all 4 records in the table · Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 95% of clinicians listed under Dentist - General Practice in Diamond Bar, CA (2024, 20 clinicians with data). Median for this group: 39. Middle half: 23 to 102.
More Part D prescriptions than 95% of clinicians listed under Dentist - General Practice in California (2024, 6,509 clinicians with data). Median for this group: 35. Middle half: 18 to 69.
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 B services went from 37 in 2017 to 134 in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017–2020.
Practice Location & Contact Primary Location
20657 Golden Springs Dr Ste 205b
Diamond Bar, CA 917893837
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Dentist - General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
50 people with Original Medicare in 2020
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2020.
Medicare-allowed amount
About $72,075 in 2020
The total amount Medicare approved for these services in 2020. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020.
Paid by Medicare
About $55,988 in 2020
The part of the Medicare-allowed amount that Medicare itself paid in 2020, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020.
30-day fills
389 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
$1,331 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
2006
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 Diamond Bar and California
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 95% of clinicians listed under Dentist - General Practice in Diamond Bar, CA (2024, 20 clinicians with data). Median for this group: 39. Middle half: 23 to 102.
More Part D prescriptions than 95% of clinicians listed under Dentist - General Practice in California (2024, 6,509 clinicians with data). Median for this group: 35. Middle half: 18 to 69.
Part D drug cost
A higher Part D drug cost than 85% of clinicians listed under Dentist - General Practice in Diamond Bar, CA (2024, 20 clinicians with data). Median for this group: $197. Middle half: $114 to $520.
A higher Part D drug cost than 95% of clinicians listed under Dentist - General Practice in California (2024, 6,509 clinicians with data). Median for this group: $147. Middle half: $75 to $317.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Kwon are from 2020.
41 active clinicians are listed under Dentist - General Practice with a practice address in Diamond Bar, CA (17,958 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Diamond Bar
0% of these 41 clinicians have the CMS telehealth indicator.
0% of these 41 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 B services
Medicare Part B services increased 262% from 37 in 2017 to 134 in 2020.
- 2017: 37
- 2018: 1,391
- 2019: 578
- 2020: 134
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Medicare-allowed amount
Medicare-allowed amount increased 2268% from $3,044 in 2017 to $72,075 in 2020.
- 2017: $3,044
- 2018: $823,578
- 2019: $384,570
- 2020: $72,075
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Paid by Medicare
Paid by Medicare increased 2209% from $2,425 in 2017 to $55,988 in 2020.
- 2017: $2,425
- 2018: $650,129
- 2019: $302,914
- 2020: $55,988
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 21% from 321 in 2020 to 389 in 2024.
- 2020: 321
- 2021: 475
- 2022: 286
- 2023: 350
- 2024: 389
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30-day fills
30-day fills increased 21% from 321 in 2020 to 389 in 2024.
- 2020: 321
- 2021: 475
- 2022: 286
- 2023: 350
- 2024: 389
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Part D drug cost
Part D drug cost varied from year to year: $1,237 in 2020 and $1,331 in 2024.
- 2020: $1,237
- 2021: $1,947
- 2022: $1,313
- 2023: $1,525
- 2024: $1,331
Sources: CMS Medicare Physician & Other Practitioners (2020), 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.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2019 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2020; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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40801
Complicated drainage of abscess, cyst, or blood accumulation of mouth
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35 | 32 | $500.00 | $173.10 |
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70355
X-ray of lower jaws, upper jaws and teeth
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29 | 28 | $53.45 | $21.60 |
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21208
Incision and repair of bony defect of cheek bone with repositioning of bony segment
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20 | 19 | $1965.00 | $1073.80 |
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21210
Repair of nasal or cheek bone with bone graft
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16 | 16 | $2612.50 | $2093.23 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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12 | 12 | $237.50 | $117.73 |
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21085
Impression and custom preparation of oral surgical splint
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11 | 11 | $1700.00 | $792.97 |
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76376
3d radiographic procedure
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11 | 11 | $40.00 | $26.10 |
Source: CMS Part B by Provider and Service, 2020; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
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 |
|---|---|---|---|---|---|
| Amoxicillin | Amoxicillin | 157 | 1,105 | $436.45 | 86 |
| Chlorhexidine Gluconate | Chlorhexidine Gluconate | 138 | 2,102 | $674.27 | 65 |
| Ibuprofen | Ibuprofen | 83 | 595 | $139.22 | 52 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 11 | 83 | $81.18 | — |
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
NUCC 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.
NUCC Taxonomy Code: 122300000X
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.
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
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
NPI status registered as active in NPPES database
Registered at 20657 GOLDEN SPRINGS DR STE 205B, DIAMOND BAR, CA 917893837 (Tel: 9098598800)
Registered at 20657 GOLDEN SPRINGS DR STE 205B, DIAMOND BAR, CA 917893837 (Tel: 9098598800)
Recorded as OJIN KWON, D.D.S.
Dentist (license number reported to NPPES: CA 29336)
NPI status registered as active in NPPES database
Registered at 15632 S NORMANDIE AVE, GARDENA, CA 902474016 (Tel: 3105325232)
Registered at 15632 S NORMANDIE AVE, GARDENA, CA 902474016 (Tel: 3105325232)
Recorded as OJIN KWON, DDS
Dentist (license number reported to NPPES: CA 29336)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Dentist - General Practices in Diamond Bar
- Dr. John Lee, DMD
- Dr. Lindy Beverly, DDS
- Dr. Jay Bhatt, DDS
- Dr. Joon Lee, DDS
- Dr. Sanjay Doshi, DDS
- Dr. Sung Kyu Lee, DDS
Mailing Address
20657 Golden Springs Dr Ste 205b
Diamond Bar, CA 917893837
Phone: 9098598800