Doctor profile · Federal record
Dr. Richard Timmerman, P.A.
Physician Assistant · Mission Viejo, CA
- NPI 1083809552
- 19 yrs on file
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
27700 Medical Center RD
Mission Viejo, CA 926916426
(949) 364-1400
fax (949) 365-4941 - Mailing address
-
Po Box 660099
Arcadia, CA 910660099
Credentials & registration
- NPI registered
- September 2007 — 19 yrs on file
- Specialty taxonomy
- 363A00000X — NUCC code
- State license (1)
- California #PA19082
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1083809552. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
40
Distinct HCPCS
2
Medicare allowed
$4,657
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99284 |
Emergency department visit with moderate level of medical decision making | 28 | 28 | $106 | |
99285 |
Emergency department visit with high level of medical decision making | 12 | 11 | $141 |
In context: peer comparison
Among 8 peers in Mission Viejo Physician Assistant, average services per provider: 65. This provider delivers 0.6× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
39
Patients
39
Total drug cost
$192
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 20 | 20 | $83 |
| Cephalexin | Generic | 19 | 19 | $109 |
Frequently asked questions
What is Dr. Richard Timmerman's medical specialty?
Dr. Richard Timmerman practices Physician Assistant in Mission Viejo, CA.
Where does Dr. Richard Timmerman practice?
Dr. Richard Timmerman practices at 27700 Medical Center RD, Mission Viejo, CA 926916426. Office phone: 9493641400.
What is Dr. Richard Timmerman's NPI?
Dr. Richard Timmerman's National Provider Identifier (NPI) is 1083809552, issued by NPPES.
What procedures does Dr. Richard Timmerman commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with moderate level of medical decision making (HCPCS 99284); Emergency department visit with high level of medical decision making (HCPCS 99285). Source: CMS Medicare Physician & Other Practitioners file.