Justine Byk, PSY.D.
Clinical Psychologist · San Francisco, CA
Justine Byk, PSY.D. is a clinical psychologist with a practice address in San Francisco, California, and NPI 1073997292, issued on Jul 17, 2015. Check the license (California PSY27255, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Justine Byk
- Credential
- PSY.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- PSY27255 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1738 Union St, San Francisco, CA 94123
- Phone
- (303) 506-2501
- Enumerated
- Jul 17, 2015
- Entity
- Type 1 · individual
Also registered at 1738 Union St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Emma Bargetto, BS, MA, AMFTMental Health Counselor1568272672
- Erika BoissiereMarriage & Family Therapist1396134375
- Lynn Byk, PH.D.Clinical Psychologist1124175955
- Elizabeth Corsale, ELIZABETH CORSALEMarriage & Family Therapist1598926883
- Joan Demartini Warren, PSY.D.Clinical Psychologist1174547111
- Navneet Gill, PSY.D.Clinical Neuropsychologist1164743167
Verify Justine Byk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PSY27255Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
719 clinical psychologist records list a San Francisco practice address
They are 719 of the 38,143 NPPES records with a San Francisco practice address, and 11,200 clinical psychologist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 719 in San Francisco → All 11,200 in California → Every provider in San Francisco →
Other clinical psychologist records in California
- Tanya Aaen, PH.D.Martinez, CA1477518561
- Jack Aamot, PSY.D.Napa, CA1770711210
- Elena Abalo-Dehmer, PH.D.Anaheim, CA1942406368
- Brian Abary, PSY.DLos Angeles, CA1538354832
- Tatevik Abaryan, PH.D.Pacoima, CA1952682619
- Liana Abascal, PH.D.San Diego, CA1073740569
- Jessica Abdalla, PHDWalnut Creek, CA1558069211
- Mohamed Abdallah, PSY.DEl Centro, CA1912430851
- Megan Abdolrashidi, PSYDGilroy, CA1093293094
- Qutayba Abdullatif, PH.D.Pasadena, CA1134667751
Common questions
What is Justine Byk, PSY.D.'s NPI number?
Justine Byk, PSY.D.'s National Provider Identifier (NPI) is 1073997292, issued on Jul 17, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Justine Byk, PSY.D. located?
The NPPES record lists a practice address at 1738 Union St, San Francisco, CA, 94123. Phone: (303) 506-2501. Providers update this record themselves, so call before visiting.
How can I verify Justine Byk, PSY.D.'s license?
NPPES lists California license number PSY27255, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.