Mark R Alejandro , RN
Registered Nurse • Castro Valley, CA
Professional Overview & Biography Verified Profile Summary
Mark Alejandro, RN is a registered healthcare professional specializing in Registered Nurse in Castro Valley, CA. Practice services are available at 15200 FOOTHILL BLVD under active NPI credentials.
Practice Location & Contact Primary Location
15200 Foothill Blvd
Castro Valley, CA 945781013
Specialty Benchmarks & Practice Insights
Comparative analytics for Registered Nurse in Castro Valley, CA
Practicing in Castro Valley, CA (13888 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Medical Specialties & State Licenses
CMS Verified: 2026-07-09NUCC Taxonomy Code: 163W00000X
(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive either a diploma from a hospital program, an associate degree in nursing (A.D.N.) or a Bachelor of Science degree in nursing (B.S.N.), who is licensed or certified by the state, and is practicing within the scope of that license or certification. R.N.'s assist patient in recovering and maintaining their physical or mental health. They assist physicians during treatments and examinations and administer medications. (2) A provider who is trained and educated in a formal nursing education program at an accredited school of nursing, passes a national certification examination, and is licensed by the state to practice nursing. The individual provides nursing services to patients or clients in areas such as health promotion, disease prevention, acute and chronic care and restoration and maintenance of health across the life span.
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Licensed Vocational Nurse
Registered Nurse - Psychiatric/Mental Health
Social Worker - Clinical
Master of Social Work
Student in an Organized Health Care Education/Training Program
Licensed Vocational Nurse
Licensed Vocational Nurse
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
NPI status registered as active in NPPES database
Registered at 15200 FOOTHILL BLVD, CASTRO VALLEY, CA 945781013 (Tel: 5103529690)
Registered at 764 PORTOLA WAY UNIT 102, NAPA, CA 945593041
Recorded as MARK ALEJANDRO, RN
Registered Nurse (License #95356222 in CA)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
Verified patient ratings, medical care experiences, and facility photos
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NPI Administrative Meta
Mailing Address
764 Portola Way Unit 102
Napa, CA 945593041
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