Devin Colin Oliver Walker, DO
Child & Adolescent Psychiatry Physician · Fontana, CA
Devin Colin Oliver Walker, DO is a child & adolescent psychiatry physician with a practice address in Fontana, California, and NPI 1801384599, issued on Apr 27, 2018. Check the license (California 20A17649, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Devin Colin Oliver Walker
- Credential
- DO
- Primary taxonomy
- Child & Adolescent Psychiatry Physician 2084P0804X
- License number
- 20A17649 CA
Self-reported in NPPES; status is on the state search - Practice location
- 17234 Valley Blvd, Fontana, CA 92335
- Phone
- (909) 427-5603
- Enumerated
- Apr 27, 2018
- Record last updated
- May 1, 2024
- Medicare enrollment
- Enrolled (PECOS I20210827002282); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest child & adolescent psychiatry physician records → All 1,009 in California → Look up another NPI →
Also registered at 17234 Valley Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nada Awad, MDStudent in an Organized Health Care Education/Training Program1770070591
- Blake BaileyStudent in an Organized Health Care Education/Training Program1265168496
- George BanzonStudent in an Organized Health Care Education/Training Program1952006231
- Matthew BergendahlStudent in an Organized Health Care Education/Training Program1417650268
- Shanon Biagi-FahimStudent in an Organized Health Care Education/Training Program1215787684
- Alexander Bressler, DOFamily Medicine Physician1073991709
Verify Devin Colin Oliver Walker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A17649Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
23% fewer Medicare Part D claims than the average child & adolescent psychiatry physician in 2024
387 Medicare Part D claims for 135 beneficiaries, against an average of 504 among the 3,545 providers of this specialty who prescribed in Part D.
Most prescribed
- Duloxetine Hcl29 claims
- Lorazepam27 claims
- Risperidone26 claims
- Fluoxetine Hcl25 claims
- Bupropion Xl22 claims
- Trazodone Hcl22 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Devin Colin Oliver Walker among 1,009 child & adolescent psychiatry physician records in California
Devin Colin Oliver Walker, DO is one of 1,009 child & adolescent psychiatry physician records with a practice address in California. 55% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 91% of them.
- NPI issued2018 · 91% of these records are older, 8% newer
- In a Medicare fileYes · 55% of these records are
- In the CMS Doctors and Clinicians fileYes · 21% of these records are
- Graduated2018 · median 2005 among the 215 with a school on file
- Record last updated2024 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0804X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Child & Adolescent Psychiatry Physician providers in California
There are 1,009 child & adolescent psychiatry physician records in California.
All 1,009 in California → Every provider in Fontana → Child & Adolescent Psychiatry Physician nationwide →
The 8 child & adolescent psychiatry physician records with the nearest ZIP codes
- Susan Cho, M.D.Fontana, CA 923351245459619
- Victor Dang, MDFontana, CA 923351205567336
- Kamal Dhawan, MDFontana, CA 923351114075025
- Tania GhazarianFontana, CA 923351184365090
- Kevin Guber, M.D.Fontana, CA 923351740443928
- Mark HalimFontana, CA 923351558998542
- Maher Kozman, MDFontana, CA 923351700957602
- Rahul Maini, MDFontana, CA 923351831891803
Common questions
What is Devin Colin Oliver Walker, DO's NPI number?
Devin Colin Oliver Walker, DO's National Provider Identifier (NPI) is 1801384599, issued on Apr 27, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Devin Colin Oliver Walker, DO located?
The NPPES record lists a practice address at 17234 Valley Blvd, Fontana, CA, 92335. Phone: (909) 427-5603. Providers update this record themselves, so call before visiting.
How can I verify Devin Colin Oliver Walker, DO's license?
NPPES lists California license number 20A17649, 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 Devin Colin Oliver Walker, DO prescribe under Medicare Part D?
In 2024, Devin Colin Oliver Walker, DO had 387 Medicare Part D claims for 135 beneficiaries; the average among child & adolescent psychiatry physician prescribers was 504. 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.