Peter Cotsirilos, M.D.
NPI 1235378621 · Psychiatry Physician · Red Bluff, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Cotsirilos, M.D. is a Psychiatry Physician provider in Red Bluff, CA (NPI 1235378621).
Provider details
- NPI number
- 1235378621
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G66322 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
416 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 211 | $92 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 178 | $130 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 14 | $195 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 13 | $183 |
Typical Medicare-allowed amounts for these services range $92–$195 (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 · 48 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Olanzapine | 295 | 39 |
| Lithium Carbonate | 274 | 40 |
| Quetiapine Fumarate | 196 | 27 |
| Divalproex Sodium | 182 | 22 |
| Benztropine Mesylate | 168 | 26 |
| Hydroxyzine Pamoate | 143 | 30 |
| Lamotrigine | 141 | 24 |
| Risperidone | 135 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-02-10
- Last updated
- 2022-09-12
- Certified
- 2022-08-22
Frequently asked questions
- What is Peter Cotsirilos's NPI number?
- Peter Cotsirilos's National Provider Identifier (NPI) is 1235378621, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Cotsirilos's specialty?
- Peter Cotsirilos is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Cotsirilos located?
- Peter Cotsirilos's practice location on file with NPPES is 925 Walnut St, Red Bluff, CA 96080-3707.
- What is Peter Cotsirilos's phone number?
- The practice phone number listed in the NPPES registry for Peter Cotsirilos is (530) 567-7300.
- Does Peter Cotsirilos accept Medicare?
- Peter Cotsirilos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Cotsirilos's NPI active?
- Yes — Peter Cotsirilos's NPI (1235378621) is active in the NPPES registry as of the last update on 2022-09-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.