Dr. Peter John Cotsirilos Jr., MD
- Medicare services, 2024
- 416
- Medicare patients, 2024
- 110
- Part D claims, 2024
- 3,498
- Hospital affiliations
- 4
- Industry payments
- $1,529
- Practice address
- 2767 Olive Highway, Oroville, CA 95966
- Practice phone
- Call (530) 533-8500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Cotsirilos' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Peter John Cotsirilos Jr. is a psychiatrist in Oroville, California
Dr. Cotsirilos practices at Oroville Hospital in Oroville, California, part of Oro Hospital.
Dr. Cotsirilos' NPI, 1235378621, was assigned on February 10, 2009. Dr. Cotsirilos graduated from University of Illinois College of Medicine - Chicago in 1987. Dr. Cotsirilos holds California license G66322.
- NPI
- 1235378621NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668524315
- NPI enumeration date
- February 10, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (530) 533-8500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Peter John Cotsirilos Jr. practices at Oroville Hospital in Oroville, California
Dr. Cotsirilos' primary practice is Oroville Hospital, at 2767 Olive Highway, Oroville, CA 95966 in Butte County. The practice phone is (530) 533-8500.
- Oroville Hospital2767 Olive Highway, Oroville, CA 95966 · Butte CountyPhone(530) 533-8500
Source: Dmand AI Affiliation Data
Dr. Peter John Cotsirilos Jr. is affiliated with 4 sites of care and 2 medical groups
Dr. Cotsirilos' primary practice is Oroville Hospital in Oroville, California, part of Oro Hospital. Dr. Cotsirilos is also affiliated with Sutter Medical Center, Sacramento. The medical group on file is Advanced Psychiatry Associates. Dmand AI also links Dr. Cotsirilos to 2 more hospitals and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Peter John Cotsirilos Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Cotsirilos practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Oroville Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Oro Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Peter John Cotsirilos Jr. is one of 6,803 psychiatrists in California
Psychiatry is Dr. Cotsirilos' primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dmand AI has Dr. Cotsirilos' licenses on file in 3 states: California, Illinois and Wisconsin.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
- Illinois license
- Wisconsin license
Clinical focus
Dmand AI lists ADHD, anxiety, bipolar disorder, depression, intellectual and developmental disabilities and schizophrenia among the conditions Dr. Cotsirilos treats.
Psychiatrists near Dr. Cotsirilos
Counts of psychiatrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Peter John Cotsirilos Jr. billed Medicare for 416 services in 2024
CMS data shows 416 Medicare services from Dr. Cotsirilos across 4 procedure codes in 2024, for 110 Medicare patients. Medicare paid $34,135 for them. Every service was in an office.
Dr. Cotsirilos' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4252024: 4025%
- Tests and treatments
- 2023: 222024: 1436%
Dr. Cotsirilos compared with the California median for psychiatrists, 2024
- Dr. Cotsirilos
- California median
- Medicare services
- 416vs 1193.5 times
- Medicare patients
- 110vs 412.7 times
- Part D claims
- 3,376vs 14423.4 times
Medians across 6,809 psychiatrists in California with Dmand AI profiles that report each measure.
Dr. Cotsirilos' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Cotsirilos?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Cotsirilos and other psychiatrists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Peter John Cotsirilos Jr. treated 110 Medicare patients in 2024, average age 56
CMS counts 110 Medicare patients who saw Dr. Cotsirilos in 2024. The largest group is under 65, with 79 patients. 72% of them have mood disorders, and 68% have high cholesterol. Their average risk score is 1.16, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Cotsirilos' median patient age at 37, with 40% women.
Dr. Cotsirilos' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Cotsirilos' Medicare patients by sex, 2024
- Women6458%
- Men4642%
Chronic conditions among Dr. Cotsirilos' Medicare patients, 2024
- Mood disorders72%
- High cholesterol68%
- Bipolar disorder52%
- High blood pressure48%
- Anxiety42%
- Schizophrenia and other psychoses42%
- Depression39%
- Diabetes30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Cotsirilos' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 37
Patient panel by sex, all payers
- Women40%
- Men59%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Peter John Cotsirilos Jr. wrote 3,498 Medicare Part D claims in 2024
In 2024, Dr. Cotsirilos wrote 3,498 Medicare Part D claims for 196 patients. 89% of them were for generic drugs. CMS names the drug for 3,376 of them, across 48 drugs with 11 or more claims each, at $1,011,833 in total drug cost. In 2023, CMS named 3,176 claims across 44 drugs.
Dr. Cotsirilos' Part D claims by kind of drug, 2024
- Generic3,116 claims89%
- Brand-name382 claims11%
Dr. Cotsirilos' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Cotsirilos' Part D claims, 2024
- Antipsychotics, patients 65 and over5%182 of 3,498 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,1762024: 3,3766%
Drugs named by CMS: 48 in 2024, 44 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Peter John Cotsirilos Jr. takes part in Medicare
Dr. Cotsirilos accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Peter John Cotsirilos Jr. received $1,529 in industry payments from 2016 to 2025
CMS Open Payments shows 101 general payments to Dr. Cotsirilos from 13 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 82% of the total. Alkermes, Inc. paid the most, $349.
General payments to Dr. Cotsirilos by program year, 2016 to 2025
General payments to Dr. Cotsirilos by kind, 2016 to 2025
- Food and beverage$1,25582%
- Consulting fees$15010%
- Education$1248%
Companies that paid Dr. Cotsirilos the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Peter John Cotsirilos Jr. graduated from University of Illinois College of Medicine - Chicago
Dr. Cotsirilos graduated from University of Illinois College of Medicine - Chicago in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Peter John Cotsirilos Jr. accepts plans from 4 insurance carriers
Dr. Cotsirilos is in network with 4 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- CMS Medicare
Plan types Dr. Cotsirilos accepts, by number of carriers
- Medicare3
- PPO3
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Peter John Cotsirilos Jr.'s profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Peter John Cotsirilos Jr.
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Peter John Cotsirilos Jr.'s NPI number?
Dr. Peter John Cotsirilos Jr.'s NPI number is 1235378621. It was assigned on February 10, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Peter John Cotsirilos Jr.?
Dr. Peter John Cotsirilos Jr. is a psychiatrist in Oroville, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Peter John Cotsirilos Jr. practice?
Dr. Cotsirilos practices at 2767 Olive Highway, Oroville, CA 95966. Dr. Cotsirilos' primary practice is Oroville Hospital in Oroville, California, part of Oro Hospital. Dmand AI also links Dr. Cotsirilos to 2 hospitals and 1 medical group.
What is Dr. Peter John Cotsirilos Jr.'s office phone number?
The practice phone on file for Dr. Cotsirilos is (530) 533-8500.
What is Dr. Peter John Cotsirilos Jr.'s medical license number?
Dr. Cotsirilos holds California license G66322, one of the licenses on file in 3 states.
Which states has Dr. Peter John Cotsirilos Jr. been licensed in?
Dmand AI has state licenses on file for Dr. Cotsirilos in California (1989 to 2027), Illinois (1989 to 2005) and Wisconsin (1988 to 2005).
Which hospitals is Dr. Peter John Cotsirilos Jr. affiliated with?
Dr. Cotsirilos practices at Oroville Hospital in Oroville, California. Dr. Cotsirilos is also affiliated with Sutter Medical Center, Sacramento. Dmand AI links Dr. Cotsirilos to 2 more hospitals.
What medical group is Dr. Peter John Cotsirilos Jr. part of?
Dr. Cotsirilos is linked to Advanced Psychiatry Associates. Dmand AI links Dr. Cotsirilos to 1 more medical group.
Does Dr. Peter John Cotsirilos Jr. accept Medicare?
Yes. CMS data shows Dr. Cotsirilos billed Medicare for 416 services in 2024, and Dr. Cotsirilos accepts Medicare assignment.
How many Medicare patients does Dr. Peter John Cotsirilos Jr. see?
CMS counts 110 Medicare patients who saw Dr. Cotsirilos in 2024, with an average age of 56.
Show 6 more questionsShow fewer questions
What services does Dr. Peter John Cotsirilos Jr. bill to Medicare?
In 2024, Dr. Cotsirilos' most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and psychiatric service (90792).
Where did Dr. Peter John Cotsirilos Jr. go to medical school?
Dr. Cotsirilos graduated from University of Illinois College of Medicine - Chicago in 1987.
What drugs does Dr. Peter John Cotsirilos Jr. prescribe most?
In 2024 Medicare Part D data, Dr. Cotsirilos' most prescribed drugs by claims were Olanzapine, Lithium Carbonate and Quetiapine Fumarate.
Has Dr. Peter John Cotsirilos Jr. received payments from drug or device companies?
CMS Open Payments shows $1,529 in general payments to Dr. Cotsirilos from 13 companies from 2016 to 2025. The largest total came from Alkermes, Inc.
How long has Dr. Peter John Cotsirilos Jr. been practicing?
Dr. Cotsirilos graduated from medical school in 1987, 39 years ago.
What insurance does Dr. Peter John Cotsirilos Jr. accept?
Dr. Cotsirilos is in network with 4 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
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