Doctor profile · Federal record
Dr. Ryan Ah San, PA-C
Medical Physician Assistant (CMS: Physician Assistant) · Rancho Santa Margarita, CA
- NPI 1013181346
- Accepts Medicare
- 26 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
29472 Avenida de Las Bandera
Rancho Santa Margarita, CA 926882651
(949) 459-9968
fax (949) 766-2565 - Mailing address
-
17360 Brookhurst St, Attn: McMf - Credentialing Department
Fountain Valley, CA 927083720
Credentials & registration
- NPI registered
- April 2008 — 18 yrs on file
- Profile last updated
- March 9, 2016
- Year of graduation
- 2000 — 26 yrs since
- Specialty taxonomy
- 363AM0700X — NUCC code
- State license (1)
- California #PA15744
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1013181346. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
187
Distinct HCPCS
3
Medicare allowed
$10,999
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 92 | 68 | $79 | |
36415 |
Insertion of needle into vein for collection of blood sample | 60 | 38 | $6 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 35 | 24 | $97 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 66. This provider delivers 2.8× the peer median.Open Payments
Industry payments received
All-time total
$55
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Medtronic, Inc. | 1 | $55.36 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
630
Patients
180
Total drug cost
$53,803
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 109 | 35 | $1,264 |
| Levothyroxine Sodium | Generic | 77 | 25 | $1,448 |
| Amlodipine Besylate | Generic | 44 | 15 | $158 |
| Losartan Potassium | Generic | 42 | 18 | $551 |
| Rosuvastatin Calcium | Generic | 41 | 12 | $1,628 |
| Lisinopril | Generic | 40 | 14 | $486 |
| Metformin Hcl | Generic | 38 | 14 | $274 |
| Hydrochlorothiazide | Generic | 35 | 11 | $118 |
| Ozempic (Semaglutide) | Brand | 35 | 0 | $45,178 |
| Ezetimibe | Generic | 30 | 0 | $1,056 |
Frequently asked questions
What is Dr. Ryan Ah San's medical specialty?
Dr. Ryan Ah San practices Medical Physician Assistant in Rancho Santa Margarita, CA.
Where does Dr. Ryan Ah San practice?
Dr. Ryan Ah San practices at 29472 Avenida de Las Bandera, Rancho Santa Margarita, CA 926882651. Office phone: 9494599968.
What is Dr. Ryan Ah San's NPI?
Dr. Ryan Ah San's National Provider Identifier (NPI) is 1013181346, issued by NPPES.
Does Dr. Ryan Ah San accept Medicare assignment?
Yes. Dr. Ryan Ah San accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ryan Ah San commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.