Robert I. Picker, M.D.
Psychiatry Physician · Walnut Creek, CA
Robert I. Picker, M.D. is a psychiatry physician with a practice address in Walnut Creek, California, and NPI 1275574691, issued on Jun 9, 2006. Check the license (California G19505, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert I. Picker
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- G19505 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1399 Ygnacio Valley RD, Walnut Creek, CA 94598
- Phone
- (925) 945-8440
- Enumerated
- Jun 9, 2006
- Record last updated
- Oct 19, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (924) 945-8448
- Medicare enrollment
- Enrolled (PECOS I20041027000729); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1969
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 1399 Ygnacio Valley RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert I. Picker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G19505Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% more Medicare Part D claims than the average psychiatry physician in 2024
1,180 Medicare Part D claims for 94 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Quetiapine Fumarate92 claims
- Dextroamphetamine-Amphetamine71 claims
- Lorazepam70 claims
- Bupropion Xl69 claims
- Zolpidem Tartrate69 claims
- Clonazepam47 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: $2,736.71
111 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.
Bills Medicare through one group practice
- Comprehensive Psychiatric Services A Medical GroupWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert I. Picker among 8,673 psychiatry physician records in California
Robert I. Picker, M.D. 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 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 67% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated1969 · median 2005 among the 3,295 with a school on file
- Record last updated2010 · 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).
67 psychiatry physician records list a practice address in Walnut Creek
They are 67 of the 6,170 NPPES records with a practice address in Walnut Creek, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Walnut Creek → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Paul Abrinko, MDWalnut Creek, CA 945981912081308
- Allan Barza, M.D.Walnut Creek, CA 945981952475030
- Ileana Boitor, MDWalnut Creek, CA 945981245485242
- Robert Hepps, M.D.Walnut Creek, CA 945981457441545
- Bradley Johnson, M.D.Walnut Creek, CA 945981407023567
- Raymond Ruzicano, M.D.Walnut Creek, CA 945981811062508
- Samee Shahzada, M.D.Walnut Creek, CA 945981831345784
- Richard Slawsky, M.D.Walnut Creek, CA 945981669528410
Common questions
What is Robert I. Picker, M.D.'s NPI number?
Robert I. Picker, M.D.'s National Provider Identifier (NPI) is 1275574691, issued on Jun 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert I. Picker, M.D. located?
The NPPES record lists a practice address at 1399 Ygnacio Valley RD, Walnut Creek, CA, 94598. Phone: (925) 945-8440. Providers update this record themselves, so call before visiting.
How can I verify Robert I. Picker, M.D.'s license?
NPPES lists California license number G19505, 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 Robert I. Picker, M.D. prescribe under Medicare Part D?
In 2024, Robert I. Picker, M.D. had 1,180 Medicare Part D claims for 94 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.