Peter Adamczyk, M.D.
Neurology Physician · Castro Valley, CA
Peter Adamczyk, M.D. is a neurology physician with a practice address in Castro Valley, California, and NPI 1689710915, issued on Jan 30, 2007. Check the license (California A98461, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Peter Adamczyk
- Credential
- M.D.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- A98461 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20055 Lake Chabot RD, Castro Valley, CA 94546
- Phone
- (510) 538-7738
- Enumerated
- Jan 30, 2007
- Record last updated
- Aug 28, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (510) 538-7777
- Medicare enrollment
- Enrolled (PECOS I20131112001556); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Also registered at 20055 Lake Chabot RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Peter Adamczyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A98461Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average neurology physician in 2024
26 Medicare Part D claims for 11 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D.
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: $377.49
9 payments; by number, the most common kind was food and beverage; the largest payer was Stryker Corporation. The 10,858 providers of this specialty with any payment received $8,318.07 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 Adamczyk among 2,339 neurology physician records in California
Peter Adamczyk, M.D. is one of 2,339 neurology physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 48% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2005 · median 2006 among the 1,628 with a school on file
- Record last updated2013 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California.
All 2,339 in California → Every provider in Castro Valley → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Barry Mann, MDCastro Valley, CA 945461831108844
- Vasiliki Economou, M.D.Hayward, CA 945451104912062
- Joseph Seab, MDHayward, CA 945451326126178
- Attigupam Jayaram, M.D.Livermore, CA 945501144279951
- Mark D'Esposito, M.D.Martinez, CA 945531467561704
- Pranati Nandi, MDMartinez, CA 945531811070568
- Lori Panossian, MDMartinez, CA 945531134380918
- Farah Rana, MDMartinez, CA 945531770513608
Common questions
What is Peter Adamczyk, M.D.'s NPI number?
Peter Adamczyk, M.D.'s National Provider Identifier (NPI) is 1689710915, issued on Jan 30, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Peter Adamczyk, M.D. located?
The NPPES record lists a practice address at 20055 Lake Chabot RD, Castro Valley, CA, 94546. Phone: (510) 538-7738. Providers update this record themselves, so call before visiting.
How can I verify Peter Adamczyk, M.D.'s license?
NPPES lists California license number A98461, 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 Adamczyk, M.D. prescribe under Medicare Part D?
In 2024, Peter Adamczyk, M.D. had 26 Medicare Part D claims for 11 beneficiaries; the average among neurology physician prescribers was 1,370. 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.