Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Welby Nielsen, DO

Individual provider Psychiatry Physician · NPI 1962611947

Welby Nielsen, DO is a Psychiatry in San Luis Obispo, California. Graduated from University of Arizona College of Medicine in 2005, 21 years ago. Practices with Mark David Levine MD Professional Corporation, a 157-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
21
Trained at
University of Arizona College of Medicine
Licensed in
CA
In the registry since
2007
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1039 Murray Ave Ste 220
San Luis Obispo, CA 93405-2058
Phone: (805) 250-2996
Fax: (805) 250-2998
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2561 California Park Dr Ste 300, Chico, CA 95928-4208 — (530) 838-4188

Specialties & licences

Child & Adolescent Psychiatry Physician (primary) Taxonomy 2084P0804X · Licence 20A11177 (CA)
Psychiatry Physician Taxonomy 2084P0800X · Licence 20A11177 (CA)

Record details

NPI number1962611947
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 22, 2007
Last updated in NPPESMarch 29, 2018

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPSYCHIATRY
Medical schoolUNIVERSITY OF ARIZONA COLLEGE OF MEDICINE
Graduated 2005 (21 years in practice)
Group practice Mark David Levine Md Professional Corporation — 157 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in San Luis Obispo