Peter Pellionisz, MD, PHD
Psychiatry Physician · Menlo Park, CA
Peter Pellionisz, MD, PHD is a psychiatry physician with a practice address in Menlo Park, California, and NPI 1639810328, issued on Apr 5, 2022. Check the license (California A189259, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Peter Pellionisz
- Credential
- MD, PHD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A189259 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1225 Crane St Ste 106A, Menlo Park, CA 94025
- Phone
- (650) 799-1863
- Enumerated
- Apr 5, 2022
- Record last updated
- Aug 4, 2026
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Verify Peter Pellionisz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A189259Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average psychiatry physician in 2024
146 Medicare Part D claims for 20 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Sertraline Hcl16 claims
- Lithium Carbonate13 claims
- Mirtazapine12 claims
- Quetiapine Fumarate11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $244.16
2 payments; by number, the most common kind was food and beverage; the largest payer was Iti, Inc. (d/b/a Intra-Cellular Therapies, Inc.). The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Peter Pellionisz among 8,673 psychiatry physician records in California
Peter Pellionisz, MD, PHD is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 93% of them.
- NPI issued2022 · 93% of these records are older, 4% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2026 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
60 psychiatry physician records list a practice address in Menlo Park
They are 60 of the 1,265 NPPES records with a practice address in Menlo Park, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Menlo Park → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Carol Achtman, M.D.Menlo Park, CA 940251881610574
- Mary English, RN MS CNSMenlo Park, CA 940251073627923
- Grant Halischuk, MDMenlo Park, CA 940251356434922
- Maya Kopell, M.D.Menlo Park, CA 940251376569905
- Tina Lee, M.D.Menlo Park, CA 940251407895287
- Martha Losch, M.D.Menlo Park, CA 940251598791907
- Cecylia Nowakowska, M.D., PH.D.Menlo Park, CA 940251396762225
- Manasi Rana, MDMenlo Park, CA 940251871604108
Common questions
What is Peter Pellionisz, MD, PHD's NPI number?
Peter Pellionisz, MD, PHD's National Provider Identifier (NPI) is 1639810328, issued on Apr 5, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Peter Pellionisz, MD, PHD located?
The NPPES record lists a practice address at 1225 Crane St Ste 106A, Menlo Park, CA, 94025. Phone: (650) 799-1863. Providers update this record themselves, so call before visiting.
How can I verify Peter Pellionisz, MD, PHD's license?
NPPES lists California license number A189259, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Peter Pellionisz, MD, PHD prescribe under Medicare Part D?
In 2024, Peter Pellionisz, MD, PHD had 146 Medicare Part D claims for 20 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.