Gregory Michas, D.O.
NPI 1285039651 · Psychiatry Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Michas, D.O. is a Psychiatry Physician provider in Walnut Creek, CA (NPI 1285039651).
Provider details
- NPI number
- 1285039651
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- U03533 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,076 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 984 | $81 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 948 | $153 |
| Psychiatric Services Complicated By Communication Factor90785 | 110 | $16 |
| Psychotherapy With Evaluation and Management Visit, 45 Minutes90836 | 17 | $102 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 17 | $194 |
Typical Medicare-allowed amounts for these services range $16–$194 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 52 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 217 | 53 |
| Bupropion Hclbrand: Bupropion Xl | 177 | 32 |
| Lorazepam | 177 | 33 |
| Zolpidem Tartrate | 140 | 19 |
| Escitalopram Oxalate | 139 | 38 |
| Duloxetine Hcl | 138 | 27 |
| Mirtazapine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$44 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 201 14th St SwLargo, FL 33770-3133Phone: (727) 588-5200
Registry dates
- Enumerated
- 2014-10-28
- Last updated
- 2021-08-26
- Certified
- 2021-08-26
Frequently asked questions
- What is Gregory Michas's NPI number?
- Gregory Michas's National Provider Identifier (NPI) is 1285039651, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Michas's specialty?
- Gregory Michas is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Michas located?
- Gregory Michas's practice location on file with NPPES is 3100 Oak Rd Ste 270, Walnut Creek, CA 94597-2078.
- What is Gregory Michas's phone number?
- The practice phone number listed in the NPPES registry for Gregory Michas is (925) 944-9711.
- Does Gregory Michas accept Medicare?
- Gregory Michas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Michas's NPI active?
- Yes — Gregory Michas's NPI (1285039651) is active in the NPPES registry as of the last update on 2021-08-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.