Gary Denis Dylewski, DO
Psychiatry Physician · Costa Mesa, CA
Gary Denis Dylewski, DO is a psychiatry physician with a practice address in Costa Mesa, California, and NPI 1831383207, issued on Aug 29, 2007. Check the license (California 20A6529, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gary Denis Dylewski
- Credential
- DO
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 20A6529 CA
Self-reported in NPPES; status is on the state search - Practice location
- 234 East 17TH St, Costa Mesa, CA 92627
- Phone
- (949) 722-1790
- Enumerated
- Aug 29, 2007
- Record last updated
- Aug 29, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (949) 722-1717
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Verify Gary Denis Dylewski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A6529Check 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 psychiatry physician in 2024
20 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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: $249.05
3 payments; by number, the most common kind was food and beverage; the largest payer was Vanda Pharmaceuticals 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.
Gary Denis Dylewski among 8,673 psychiatry physician records in California
Gary Denis Dylewski, DO 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 2007, is newer than 33% of them.
- NPI issued2007 · 33% of these records are older, 48% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2007 · 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).
Psychiatry Physician providers in California
There are 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Costa Mesa → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Evagelos Coskinas, M.D.Costa Mesa, CA 926271437382314
- Hugo Gomez RuedaCosta Mesa, CA 926271346701455
- Diane Highum, M.D.Costa Mesa, CA 926271396868386
- Harvey Jaffe, M.D.Costa Mesa, CA 926271194751123
- Thomas Phan, M.D.Costa Mesa, CA 926271740716687
- Gail Ross, M.D.Costa Mesa, CA 926271619043361
- Michael Schwartz, D.O.Costa Mesa, CA 926271861584708
- Nisha Warikoo, M.D.Costa Mesa, CA 926271306164462
Common questions
What is Gary Denis Dylewski, DO's NPI number?
Gary Denis Dylewski, DO's National Provider Identifier (NPI) is 1831383207, issued on Aug 29, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gary Denis Dylewski, DO located?
The NPPES record lists a practice address at 234 East 17TH St, Costa Mesa, CA, 92627. Phone: (949) 722-1790. Providers update this record themselves, so call before visiting.
How can I verify Gary Denis Dylewski, DO's license?
NPPES lists California license number 20A6529, 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 Gary Denis Dylewski, DO prescribe under Medicare Part D?
In 2024, Gary Denis Dylewski, DO had 20 Medicare Part D claims; 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.