Ulda Elizabeth Rivera , PA
Physician Assistant β’ Phoenix, AZ
2070 E Baseline Rd
Phoenix, AZ 850426948
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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NPI assigned on October 25, 2021; this date does not establish years in practice.
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Published CMS data list 14 Medicare Part D prescriptions, including refills, in 2023.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2023. Published rows only; this is not a quality measure.
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Published Part D records, 2023:
- Atorvastatin Calcium β 14 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2023. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table Β· Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 28 in 2022 to 14 in 2023.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2022β2023.
Practice Location & Contact Primary Location
2070 E Baseline Rd
Phoenix, AZ 850426948
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
30 standardized 30-day fills in 2023
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
$159 in 2023
The total cost of these prescriptions in 2023, 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, 2023.
Open Payments general payments, program year 2025
All general payments: $817.99 across 20 records.
By nature of payment
- Food and Beverage: $618.05 across 18 records.
- Education: $199.94 across 2 records.
Reporting-company totals (3 largest of 9)
- Astellas Pharma US Inc: $234.17 across 4 records.
- Inspire Medical Systems, Inc.: $144.67 across 1 record.
- Amgen Inc.: $122.15 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
NPI first issued
2021
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.
Compared with the same specialty in Phoenix and Arizona
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Ulda Rivera are from 2023.
926 active clinicians are listed under Physician Assistant with a practice address in Phoenix, AZ (3,673 in Arizona).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Phoenix
14.4% of these 926 clinicians have the CMS telehealth indicator.
56.2% of these 926 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 50% from 28 in 2022 to 14 in 2023.
- 2022: 28
- 2023: 14
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30-day fills
30-day fills decreased 40% from 51 in 2022 to 30 in 2023.
- 2022: 51
- 2023: 30
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Part D drug cost
Part D drug cost went from $212 in 2022 to $159 in 2023.
- 2022: $212
- 2023: $159
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $172.20 in 2024 to $817.99 in 2025.
- 2024: $172.20
- 2025: $817.99
Sources: CMS Medicare Part D Prescribers (2023), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 β December 31, 2025): 20 records totaling $817.99.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Inspire Medical Systems, Inc. |
Food and Beverage
In-kind items and services
|
INSPIRE | General | $144.67 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
OTEZLA | General | $122.15 |
| Astellas Pharma US Inc |
Education
In-kind items and services
|
β | General | $99.99 |
| Astellas Pharma US Inc |
Education
In-kind items and services
|
β | General | $99.95 |
| UROGEN PHARMA, INC. |
Food and Beverage
In-kind items and services
|
ZUSDURI | General | $32.02 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
ERLEADA | General | $28.57 |
| Blue Earth Diagnostics |
Food and Beverage
In-kind items and services
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POSLUMA | General | $28.23 |
| Verity Pharmaceuticals Inc. |
Food and Beverage
Cash or cash equivalent
|
Tlando | General | $26.35 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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XTANDI | General | $26.01 |
| Bayer Healthcare Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
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Nubeqa | General | $24.16 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
ERLEADA | General | $23.65 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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XTANDI | General | $21.30 |
| Verity Pharmaceuticals Inc. |
Food and Beverage
Cash or cash equivalent
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Tlando | General | $20.21 |
| Bayer Healthcare Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
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Nubeqa | General | $19.33 |
| Bayer Healthcare Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
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Nubeqa | General | $19.33 |
| Verity Pharmaceuticals Inc. |
Food and Beverage
Cash or cash equivalent
|
Tlando | General | $18.31 |
| Astellas Pharma US Inc |
Food and Beverage
In-kind items and services
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Xtandi | General | $17.13 |
| Astellas Pharma US Inc |
Food and Beverage
In-kind items and services
|
Xtandi | General | $17.10 |
| Verity Pharmaceuticals Inc. |
Food and Beverage
Cash or cash equivalent
|
Tlando | General | $15.82 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
ERLEADA | General | $13.71 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2023.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 14 | 903 | $159.24 | β |
Source: CMS Part D by Provider and Drug, 2023; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2023-12-04NUCC 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.
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 - Primary Care
Family Nurse Practitioner (Certified)
Family Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2070 E BASELINE RD, PHOENIX, AZ 850426948 (Tel: 6028349071)
Registered at 4700 MILLENIA BLVD STE 650, ORLANDO, FL 328396013 (Tel: 4075336836)
Physician Assistant (license number reported to NPPES: AZ 8636)
NPI status registered as active in NPPES database
Registered at 521 W THOMAS RD FL 2, PHOENIX, AZ 850134241 (Tel: 6022540390)
Registered at PO BOX 33662, PHOENIX, AZ 850673662 (Tel: 4073410647)
Recorded as ULDA RIVERA, PA
Physician Assistant (license number reported to NPPES: PR 000771-P.A.)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Phoenix
- Clayton Gould, PA-C
- Amy Lenox, PA
- Jordan Jensen, PA-C
- Javier Padilla
- Amy Knighton, PA-C
- Arielle Brown, PA
Mailing Address
4700 Millenia Blvd Ste 650
Orlando, FL 328396013
Phone: 4075336836