Internal Medicine · Fullerton, CA
NPI
1568581759
Since 2007
Specialty
Internal Medicine
Code 207R00000X
Group practices
2
Medicare group memberships
Hospitals
3
Hospital affiliations
1950 Sunny Crest Dr Ste 2800
Fullerton, CA, 92835
Phone (657) 888-9919
Groups this clinician bills Medicare through
Medicare paid, 2024
$85K
1,328 services
Medicare patients, 2024
512
Average age 78
Drug cost, 2024
$8.5M
1,278 prescriptions
Company payments, 2025
$124
From 4 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Sang Hoon AHN was code 99214 (office e&m - established), 686 times for 345 patients. In total Sang Hoon AHN billed 1,328 services in 11 codes, and Medicare paid $85K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2026-02-18.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99214 Office E&M - Established | Office | 686 | 345 | $69.20 | $47K |
| 99441 Telephone Services | Office | 217 | 156 | $24.55 | $5,327 |
| 99213 Office E&M - Established | Office | 154 | 112 | $49.25 | $7,584 |
| 99215 Office E&M - Established | Office | 69 | 49 | $104.08 | $7,181 |
| 99204 Office E&M - New | Office | 66 | 66 | $88.21 | $5,822 |
| 99205 Office E&M - New | Office | 64 | 64 | $122.54 | $7,842 |
| 99442 Telephone Services | Office | 53 | 41 | $54.45 | $2,886 |
By year: 2022 $189K for 2,307 services; 2023 $93K for 1,402 services; 2024 $85K for 1,328 services.
Medicare prescription drug claims, 2024
In 2024, the drug Sang Hoon AHN prescribed most often to Medicare patients was Anastrozole, with 83 prescriptions and refills. In total Sang Hoon AHN wrote 1,278 Medicare prescriptions that cost $8.5M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Anastrozole Generic | 83 | 147 | 20 | $724 |
| Letrozole Generic | 83 | 178 | 24 | $1,178 |
| Promacta Eltrombopag Olamine | 78 | 78 | Under 11 | $729K |
| Tagrisso Osimertinib Mesylate | 75 | 75 | Under 11 | $1.2M |
| Erleada Apalutamide | 53 | 53 | Under 11 | $768K |
| Abiraterone Acetate Generic | 53 | 53 | Under 11 | $138K |
| Revlimid Lenalidomide | 46 | 46 | Under 11 | $636K |
| Levothyroxine Sodium Generic | 41 | 54 | Under 11 | $121 |
| Lonsurf Trifluridine/Tipiracil Hcl | 41 | 41 | Under 11 | $397K |
| Tasigna Nilotinib Hcl | 40 | 40 | Under 11 | $701K |
| Prednisone Generic | 37 | 37 | Under 11 | $65.62 |
| Hydroxyurea Generic | 35 | 61 | 14 | $767 |
| Cabometyx Cabozantinib S-Malate | 34 | 34 | Under 11 | $797K |
| Procrit Epoetin Alfa | 29 | 29 | 15 | $40K |
| Xtandi Enzalutamide | 25 | 25 | Under 11 | $335K |
Brand drugs: - claims; generic drugs: 637 claims; opioid claims: 21.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Sang Hoon AHN $124 ($124 in general payments such as food, travel and fees) from 4 companies. The largest payer was Tempus AI, Inc with $48.28.
Official US government data on Original Medicare services, Medicare prescription drug plans and the payments drug and device companies must report. Services with fewer than 11 patients and drugs with fewer than 11 claims are not published. Procedure codes are shown by number with their public category.