Alejandra Naranjo Mazzarelli , PA-C
Physician Assistant β’ Oxnard, CA
2651 S C St
Oxnard, CA 930333560
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Alejandra Mazzarelli is listed in NPPES under Physician Assistant.
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NPI assigned on December 14, 2017; this date does not establish years in practice.
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Published CMS data list 171 Medicare Part D prescriptions, including refills, in 2021.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2021. Published rows only; this is not a quality measure.
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Published Part D records, 2021:
- Lisinopril β 29 prescription fills, including refills.
- Metformin Hcl β 27 prescription fills, including refills.
- Amlodipine Besylate β 25 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2021. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 9 records in the table Β· Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 395 in 2018 to 171 in 2021.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2018β2021.
Practice Location & Contact Primary Location
2651 S C St
Oxnard, CA 930333560
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 2 distinct additional practice-address records in Oxnard, CA; Woodlake, CA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
445 standardized 30-day fills in 2021
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$2,911 in 2021
The total cost of these prescriptions in 2021, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2021.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021β2025.
NPI first issued
2017
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Alejandra Mazzarelli has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Alejandra Mazzarelli as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Oxnard and California
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Alejandra Mazzarelli are from 2021.
69 active clinicians are listed under Physician Assistant with a practice address in Oxnard, CA (14,458 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Oxnard
10.1% of these 69 clinicians have the CMS telehealth indicator.
50.7% of these 69 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 57% from 395 in 2018 to 171 in 2021.
- 2018: 395
- 2019: 1,367
- 2020: 1,446
- 2021: 171
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30-day fills
30-day fills decreased 40% from 743 in 2018 to 445 in 2021.
- 2018: 743
- 2019: 3,033
- 2020: 3,247
- 2021: 445
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Part D drug cost
Part D drug cost decreased 89% from $26,837 in 2018 to $2,911 in 2021.
- 2018: $26,837
- 2019: $175,729
- 2020: $185,909
- 2021: $2,911
Sources: CMS Medicare Part D Prescribers (2021), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2021.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Lisinopril | Lisinopril | 29 | 2,163 | $223.81 | 21 |
| Metformin Hcl | Metformin Hcl | 27 | 2,070 | $185.39 | 17 |
| Amlodipine Besylate | Amlodipine Besylate | 25 | 2,250 | $329.51 | 15 |
| Atorvastatin Calcium | Atorvastatin Calcium | 20 | 1,740 | $344.99 | 15 |
| Levothyroxine Sodium | Levothyroxine Sodium | 18 | 1,500 | $504.86 | β |
| Lovastatin | Lovastatin | 15 | 1,350 | $217.52 | β |
| Omeprazole | Omeprazole | 15 | 1,050 | $170.47 | β |
| Diclofenac Sodium | Diclofenac Sodium | 11 | 130 | $911.52 | β |
| Hydrochlorothiazide | Hydrochlorothiazide | 11 | 870 | $23.26 | β |
Source: CMS Part D by Provider and Drug, 2021; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-07-02NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20180322002265
CA
0345502712
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
201 E Lakeview Ave
Woodlake, CA 932861301
Phone: 8779603426
2061 Indiana Dr
Oxnard, CA 930366279
Phone: 8058222744
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Family Nurse Practitioner
Physician Assistant - Medical
Family Medicine
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2651 S C ST, OXNARD, CA 930333560 (Tel: 8888983806)
Registered at PO BOX 31, SOMIS, CA 930660031
Recorded as ALEJANDRA MAZZARELLI, PA-C
Registered at 201 E LAKEVIEW AVE, WOODLAKE, CA 932861301 (Tel: 8779603426)
Registered at 201 E LAKEWOOD AVE, WOODLAKE, CA 93286
Recorded as ALEJANDRA NARANJO, PA-C
NPI status registered as active in NPPES database
Registered at 2061 INDIANA DR, OXNARD, CA 930366279 (Tel: 8058222744)
Registered at PO BOX 7377, FULLERTON, CA 928347377
Recorded as ALEJANDRA CANDELARIO, PA-C
Physician Assistant (license number reported to NPPES: CA 55225)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Oxnard
- Eric Viles, PHYSICIAN ASSISTANT
- Kathryn Lynch, PA-C
- Dr. Ryan Nakasone, DC, PA-C
- Adrian Rojas, PA-C
- Griselda Soriano, PA-C
- Kristine Supple, PA
Mailing Address
Po Box 31
Somis, CA 930660031