Doctor profile · Federal record
Dr. Gregory Michas, D.O.
Psychiatry Physician (CMS: Psychiatry) · Psychiatry Physician · Walnut Creek, CA
- NPI 1285039651
- Accepts Medicare
- 13 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
3100 Oak RD Ste 270
Walnut Creek, CA 945972078
(925) 944-9711
fax (925) 944-9709 - Additional location
-
201 14Th St Sw
Largo, FL 337703133
(727) 588-5200 - Mailing address
-
1601 Cummins Dr Ste D
Modesto, CA 953586411
Credentials & registration
- NPI registered
- October 2014 — 12 yrs on file
- Profile last updated
- August 26, 2021
- Year of graduation
- 2013 — 13 yrs since
- Specialty taxonomy
- 2084P0800X — NUCC code
- State licenses (2)
- California #20A15586 · Florida #U03533
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1285039651. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,691
Distinct HCPCS
6
Medicare allowed
$153,872
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
90833 |
Psychotherapy with evaluation and management visit, 30 minutes | 785 | 168 | $67 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 671 | 155 | $110 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 119 | 31 | $159 | |
90785 |
Psychiatric services complicated by communication factor | 64 | 21 | $14 | |
90836 |
Psychotherapy with evaluation and management visit, 45 minutes | 28 | 28 | $86 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 24 | 24 | $204 |
In context: peer comparison
Among 11 peers in Walnut Creek Psychiatry Physician, average services per provider: 196. This provider delivers 8.6× the peer median.Open Payments
Industry payments received
All-time total
$44
Transactions
2
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 2 | $43.94 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,870
Patients
442
Total drug cost
$50,841
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Trazodone Hcl | Generic | 201 | 56 | $3,992 |
| Escitalopram Oxalate | Generic | 165 | 40 | $3,462 |
| Lorazepam | Generic | 163 | 33 | $852 |
| Bupropion Xl (Bupropion Hcl) | Brand | 149 | 29 | $6,034 |
| Quetiapine Fumarate | Generic | 127 | 31 | $2,778 |
| Clonazepam | Generic | 126 | 16 | $1,032 |
| Gabapentin | Generic | 122 | 37 | $4,137 |
| Sertraline Hcl | Generic | 121 | 24 | $1,862 |
| Mirtazapine | Generic | 115 | 22 | $2,159 |
| Aripiprazole | Generic | 114 | 31 | $6,688 |
Frequently asked questions
What is Dr. Gregory Michas's medical specialty?
Dr. Gregory Michas practices Psychiatry Physician in Walnut Creek, CA.
Where does Dr. Gregory Michas practice?
Dr. Gregory Michas practices at 3100 Oak RD Ste 270, Walnut Creek, CA 945972078. Office phone: 9259449711.
What is Dr. Gregory Michas's NPI?
Dr. Gregory Michas's National Provider Identifier (NPI) is 1285039651, issued by NPPES.
Does Dr. Gregory Michas accept Medicare assignment?
Yes. Dr. Gregory Michas accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gregory Michas commonly perform?
Top Medicare-reported procedures in 2023: Psychotherapy with evaluation and management visit (HCPCS 90833); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99215). Source: CMS Medicare Physician & Other Practitioners file.