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

Maureen Ursula Welker, MSN, NPC, CCRN

Individual provider Family Nurse Practitioner · NPI 1386608438

Maureen Ursula Welker, MSN, NPC, CCRN is a Nurse Practitioner in Mission Viejo, California. Qualified in 1998, 28 years ago. Practices with Oso Specialty Infusion Inc, a 10-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
28
Licensed in
CA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MSN — Master of Science in Nursing
A graduate nursing degree, usually held alongside an advanced practice licence.

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Practice location Address checks out

26800 Crown Valley Pkwy Ste 330
Mission Viejo, CA 92691-6384
Phone: (929) 364-7246
Fax: (949) 364-1647
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 10596 (CA)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence RN390049 (CA)

Record details

NPI number1386608438
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSN , NPC , CCRN
Sole proprietorNo
NPI enumeratedApril 14, 2006
Last updated in NPPESNovember 11, 2021
Certification dateNovember 11, 2021

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 1998 (28 years in practice)
Group practice Oso Specialty Infusion Inc — 10 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Mission Viejo