Doctor profile · Federal record
Dr. Arnold Knepfer, M.D.
Psychiatry Physician (CMS: Psychiatry) · Corte Madera, CA
- NPI 1134117435
- 68 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
21 Tamal Vista Blvd, 212
Corte Madera, CA 949251130
(415) 927-2320
fax (415) 927-1225
Credentials & registration
- NPI registered
- October 2005 — 21 yrs on file
- Profile last updated
- February 15, 2011
- Year of graduation
- 1958 — 68 yrs since
- Specialty taxonomy
- 2084P0800X — NUCC code
- State license (1)
- California #G5489
- Medicaid
- CA #000G54890
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1134117435. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
388
Distinct HCPCS
5
Medicare allowed
$52,256
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
90838 |
Psychotherapy with evaluation and management visit, 1 hour | 125 | 23 | $124 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 125 | 23 | $143 | |
99310 |
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 86 | 40 | $166 | |
90836 |
Psychotherapy with evaluation and management visit, 45 minutes | 26 | 14 | $93 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 26 | 14 | $85 |
In context: peer comparison
Among 2 peers in Corte Madera Psychiatry Physician, average services per provider: 67. This provider delivers 5.8× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
494
Patients
24
Total drug cost
$15,378
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Alprazolam | Generic | 91 | 12 | $1,285 |
| Zolpidem Tartrate | Generic | 49 | 0 | $642 |
| Lorazepam | Generic | 45 | 12 | $434 |
| Quetiapine Fumarate | Generic | 33 | 0 | $385 |
| Escitalopram Oxalate | Generic | 32 | 0 | $416 |
| Olanzapine | Generic | 30 | 0 | $1,725 |
| Aripiprazole | Generic | 28 | 0 | $6,823 |
| Citalopram Hbr (Citalopram Hydrobromide) | Brand | 25 | 0 | $360 |
| Risperidone | Generic | 25 | 0 | $617 |
| Bupropion Hcl SR (Bupropion Hcl) | Brand | 24 | 0 | $564 |
Frequently asked questions
What is Dr. Arnold Knepfer's medical specialty?
Dr. Arnold Knepfer practices Psychiatry Physician in Corte Madera, CA.
Where does Dr. Arnold Knepfer practice?
Dr. Arnold Knepfer practices at 21 Tamal Vista Blvd, Corte Madera, CA 949251130. Office phone: 4159272320.
What is Dr. Arnold Knepfer's NPI?
Dr. Arnold Knepfer's National Provider Identifier (NPI) is 1134117435, issued by NPPES.
Does Dr. Arnold Knepfer accept Medicare assignment?
Dr. Arnold Knepfer does not accept Medicare assignment for all services. Patients may be billed amounts beyond Medicare-allowed charges.
What procedures does Dr. Arnold Knepfer commonly perform?
Top Medicare-reported procedures in 2023: Psychotherapy with evaluation and management visit (HCPCS 90838); Established patient office or other outpatient visit (HCPCS 99214); Subsequent nursing facility care with high level of medical decision making (HCPCS 99310). Source: CMS Medicare Physician & Other Practitioners file.