Roxanne F. Umanzor-Smiley, PA
Physician Assistant · Fontana, CA
Roxanne F. Umanzor-Smiley, PA is a physician assistant with a practice address in Fontana, California, and NPI 1508914599, issued on Jan 8, 2007. Check the license (California PA13306, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Roxanne F. Umanzor-Smiley
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA13306 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9961 Sierra Ave, Fontana, CA 92335
- Phone
- (909) 427-3910
- Enumerated
- Jan 8, 2007
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100224000167); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 9961 Sierra Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Roxanne F. Umanzor-Smiley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA13306Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average physician assistant in 2024
594 Medicare Part D claims for 351 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Prednisone56 claims
- Meloxicam48 claims
- Pantoprazole Sodium46 claims
- Albuterol Sulfate Hfa30 claims
- Azithromycin22 claims
- Ibuprofen17 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupOntario, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Roxanne F. Umanzor-Smiley among 14,451 physician assistant records in California
Roxanne F. Umanzor-Smiley, PA is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 13% of them.
- NPI issued2007 · 13% of these records are older, 78% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1993 · median 2018 among the 7,214 with a school on file
- Record last updated2021 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
97 physician assistant records list a practice address in Fontana
They are 97 of the 3,012 NPPES records with a practice address in Fontana, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Fontana → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Johnetta Brooks, PAFontana, CA 923351619044450
- Mary Budrunas, PAFontana, CA 923351154498996
- Lindsay Chiu, PAFontana, CA 923351972670719
- Dawn Comstock, PAFontana, CA 923351104993948
- Amy Haager, PAFontana, CA 923351609943455
- Michael Hicks, PAFontana, CA 923351700953544
- Gena McKinney, PAFontana, CA 923351790852549
- Melody McMath, PAFontana, CA 923351780751537
Common questions
What is Roxanne F. Umanzor-Smiley, PA's NPI number?
Roxanne F. Umanzor-Smiley, PA's National Provider Identifier (NPI) is 1508914599, issued on Jan 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Roxanne F. Umanzor-Smiley, PA located?
The NPPES record lists a practice address at 9961 Sierra Ave, Fontana, CA, 92335. Phone: (909) 427-3910. Providers update this record themselves, so call before visiting.
How can I verify Roxanne F. Umanzor-Smiley, PA's license?
NPPES lists California license number PA13306, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Roxanne F. Umanzor-Smiley, PA prescribe under Medicare Part D?
In 2024, Roxanne F. Umanzor-Smiley, PA had 594 Medicare Part D claims for 351 beneficiaries; the average among physician assistant prescribers was 830. 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.