Dr. Ray Ahn , DDS
Dentist - General Practice • Pasadena, CA
2301 E Washington Blvd
Pasadena, CA 911041947
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. Ray Ahn is listed in NPPES under Dentist - General Practice.
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NPI assigned on October 22, 2014; this date does not establish years in practice.
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Published CMS data list 196 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 — 85 prescription fills, including refills.
- Ibuprofen — 69 prescription fills, including refills.
- Chlorhexidine Gluconate — 23 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 90% of clinicians listed under Dentist - General Practice in Pasadena, CA (2024, 49 clinicians with data). Median for this group: 31. Middle half: 18 to 82.
More Part D prescriptions than 90% of clinicians listed under Dentist - General Practice in California (2024, 6,515 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 D prescriptions went from 27 in 2015 to 196 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2015–2024.
Practice Location & Contact Primary Location
2301 E Washington Blvd
Pasadena, CA 911041947
What Public CMS Data Show
Dentist - General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
196 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
$690 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.
Open Payments general payments, program year 2025
All general payments: $60.05 across 2 records.
By nature of payment
- Food and Beverage: $60.05 across 2 records.
Reporting-company totals
- Dentsply Sirona Inc: $60.05 across 2 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
NPI first issued
2014
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.
Enrolled in Medicare (PECOS)
Dr. Ahn has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Ahn as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Pasadena and California
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 Pasadena, CA (2024, 49 clinicians with data). Median for this group: 31. Middle half: 18 to 82.
More Part D prescriptions than 90% of clinicians listed under Dentist - General Practice in California (2024, 6,515 clinicians with data). Median for this group: 35. Middle half: 18 to 69.
Part D drug cost
A higher Part D drug cost than 90% of clinicians listed under Dentist - General Practice in Pasadena, CA (2024, 49 clinicians with data). Median for this group: $118. Middle half: $74 to $271.
A higher Part D drug cost than 90% of clinicians listed under Dentist - General Practice in California (2024, 6,515 clinicians with data). Median for this group: $147. Middle half: $75 to $317.
99 active clinicians are listed under Dentist - General Practice with a practice address in Pasadena, CA (17,862 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Pasadena
0% of these 99 clinicians have the CMS telehealth indicator.
0% of these 99 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 626% from 27 in 2015 to 196 in 2024.
- 2015: 27
- 2018: 12
- 2021: 13
- 2023: 11
- 2024: 196
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30-day fills
30-day fills increased 626% from 27 in 2015 to 196 in 2024.
- 2015: 27
- 2018: 12
- 2021: 13
- 2023: 11
- 2024: 196
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Part D drug cost
Part D drug cost went from $275 in 2015 to $690 in 2024.
- 2015: $275
- 2018: $54
- 2021: $71
- 2023: $63
- 2024: $690
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $26.52 in 2020 to $60.05 in 2025.
- 2020: $26.52
- 2022: $1,057.65
- 2024: $54.09
- 2025: $60.05
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $60.05.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Dentsply Sirona Inc |
Food and Beverage
In-kind items and services
|
Q-MIX | General | $32.22 |
| Dentsply Sirona Inc |
Food and Beverage
In-kind items and services
|
Q-MIX | General | $27.83 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
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 | 85 | 625 | $264.07 | 66 |
| Ibuprofen | Ibuprofen | 69 | 541 | $208.68 | 52 |
| Chlorhexidine Gluconate | Chlorhexidine Gluconate | 23 | 360 | $91.08 | 18 |
| Clindamycin Hcl | Clindamycin Hcl | 19 | 137 | $125.82 | 13 |
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: 2022-05-23NUCC 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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSORDER AND REFERRING ONLY - ORAL SURGERY
I20150727000972
IN
4587978176
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2301 E WASHINGTON BLVD, PASADENA, CA 911041947 (Tel: 6267974121)
Registered at 2301 E WASHINGTON BLVD, PASADENA, CA 911041947 (Tel: 6267974121)
Dentist (license number reported to NPPES: CA 65237)
NPI status registered as active in NPPES database
Registered at 2050 E ALGONQUIN RD STE 610, SCHAUMBURG, IL 601734166 (Tel: 8477011457)
Registered at 2050 E ALGONQUIN RD STE 610, SCHAUMBURG, IL 601734166 (Tel: 8477011457)
Recorded as RAY AHN, DDS
Dentist (license number reported to NPPES: IN 12012247A)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Dentist - General Practices in Pasadena
- Dr. Rohit Basson, DDS
- Dr. James Angelos, DDS
- Dr. Jill Sekiguchi, DDS
- Dr. Hector Jauregui, DDS
- Dr. Sean Ky, DDS
- Dr. Katrina Yuille, DDS
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Mailing Address
2301 E Washington Blvd
Pasadena, CA 911041947
Phone: 6267974121