Maureen Ursula Welker, MSN, NPC, CCRN
Family Nurse Practitioner · Mission Viejo, CA
Maureen Ursula Welker, MSN, NPC, CCRN is a family nurse practitioner with a practice address in Mission Viejo, California, and NPI 1386608438, issued on Apr 14, 2006. Check the license (California 10596, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Maureen Ursula Welker
- Credential
- MSN, NPC, CCRN
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- 10596 CA
RN390049 CA
Self-reported in NPPES; status is on the state search - Practice location
- 26800 Crown Valley Pkwy, Mission Viejo, CA 92691
- Phone
- (929) 364-7246
- Enumerated
- Apr 14, 2006
- Record last updated
- Nov 11, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (949) 364-1647
- Medicare enrollment
- Enrolled (PECOS I20040726000953); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 26800 Crown Valley Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Soodabeh Abravesh, M.D.Obstetrics & Gynecology Physician1376785865
- Matt Ahmadi, D.P.M.Foot & Ankle Surgery Podiatrist1285635144
- Jennifer Altamira, ACNPAcute Care Nurse Practitioner1205815248
- Habib Azad, M.D.Nephrology Physician1114962610
- Bahman Badie, M.D.Internal Medicine Physician1396721916
- Mehrnaz Badie, M.D.Internal Medicine Physician1831212885
Verify Maureen Ursula Welker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 10596Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average family nurse practitioner in 2024
70 Medicare Part D claims for 35 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Hydroxychloroquine Sulfate13 claims
- Celecoxib11 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.
Industry payments in 2024: $423.55
13 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Oso Specialty Infusion IncMission Viejo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maureen Ursula Welker among 16,966 family nurse practitioner records in California
Maureen Ursula Welker, MSN, NPC, CCRN is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 93% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated1998 · median 2019 among the 6,793 with a school on file
- Record last updated2021 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
53 family nurse practitioner records list a practice address in Mission Viejo
They are 53 of the 2,156 NPPES records with a practice address in Mission Viejo, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Mission Viejo → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Adeline Barney, NPMission Viejo, CA 926911720467491
- Martha Carranza, NPMission Viejo, CA 926911376614925
- Jeremy Christie, FNP-CMission Viejo, CA 926911013271592
- Alice Daugherty, NURSE PRACTITIONERMission Viejo, CA 926911083621270
- Veronica Estrada, FNPMission Viejo, CA 926911295999571
- Sandra Globus, CFNPMission Viejo, CA 926911912110784
- Estera Han, MSN, FNPMission Viejo, CA 926911922415769
- Maria Felicia Marcos, MSN, FNPMission Viejo, CA 926911194043448
Common questions
What is Maureen Ursula Welker, MSN, NPC, CCRN's NPI number?
Maureen Ursula Welker, MSN, NPC, CCRN's National Provider Identifier (NPI) is 1386608438, issued on Apr 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Maureen Ursula Welker, MSN, NPC, CCRN located?
The NPPES record lists a practice address at 26800 Crown Valley Pkwy, Mission Viejo, CA, 92691. Phone: (929) 364-7246. Providers update this record themselves, so call before visiting.
How can I verify Maureen Ursula Welker, MSN, NPC, CCRN's license?
NPPES lists California license number 10596, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Maureen Ursula Welker, MSN, NPC, CCRN prescribe under Medicare Part D?
In 2024, Maureen Ursula Welker, MSN, NPC, CCRN had 70 Medicare Part D claims for 35 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.