Carmen Guadalupe Walker , NURSE PRACTITIONER
Nurse Practitioner • Orange, CA
1000 W La Veta Ave
Orange, CA 928684304
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 March 4, 2010; this date does not establish years in practice.
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Published CMS data list 72 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Omeprazole — 28 prescription fills, including refills.
- Dexamethasone — 20 prescription fills, including refills.
- Ciprofloxacin Hcl — 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 4 records in the table · Guide: How to read Medicare Part D prescriber data
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Close to the middle for Part D prescriptions among clinicians listed under Nurse Practitioner in Orange, CA (2024, 61 clinicians with data). Median for this group: 156. Middle half: 32 to 660.
Fewer Part D prescriptions than 70% of clinicians listed under Nurse Practitioner in California (2024, 3,221 clinicians with data). Median for this group: 248. Middle half: 63 to 852.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 137 in 2020 to 72 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
1000 W La Veta Ave
Orange, CA 928684304
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
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
106 standardized 30-day fills in 2024
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
$661 in 2024
The total cost of these prescriptions in 2024, 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 – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $484.81 across 14 records.
By nature of payment
- Food and Beverage: $384.82 across 13 records.
- Education: $99.99 across 1 record.
Reporting-company totals (3 largest of 7)
- Pfizer Inc.: $170.77 across 4 records.
- Pfizer Inc.: $99.99 across 1 record.
- Eisai Inc.: $73.38 across 3 records.
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
2010
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, “Does your provider accept Medicare as full payment?”
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)
Carmen Walker 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 Carmen Walker 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 Orange and California
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Nurse Practitioner in Orange, CA (2024, 61 clinicians with data). Median for this group: 156. Middle half: 32 to 660.
Fewer Part D prescriptions than 70% of clinicians listed under Nurse Practitioner in California (2024, 3,221 clinicians with data). Median for this group: 248. Middle half: 63 to 852.
Part D drug cost
A lower Part D drug cost than 65% of clinicians listed under Nurse Practitioner in Orange, CA (2024, 61 clinicians with data). Median for this group: $3,716. Middle half: $252 to $79,628.
A lower Part D drug cost than 75% of clinicians listed under Nurse Practitioner in California (2024, 3,221 clinicians with data). Median for this group: $13,982. Middle half: $995 to $121,041.
147 active clinicians are listed under Nurse Practitioner with a practice address in Orange, CA (8,237 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Orange
21.1% of these 147 clinicians have the CMS telehealth indicator.
57.1% of these 147 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 47% from 137 in 2020 to 72 in 2024.
- 2020: 137
- 2021: 143
- 2022: 136
- 2023: 91
- 2024: 72
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30-day fills
30-day fills decreased 37% from 169 in 2020 to 106 in 2024.
- 2020: 169
- 2021: 194
- 2022: 166
- 2023: 126
- 2024: 106
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Part D drug cost
Part D drug cost decreased 100% from $255,630 in 2020 to $661 in 2024.
- 2020: $255,630
- 2021: $1,793
- 2022: $12,011
- 2023: $1,080
- 2024: $661
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $362.23 in 2021 to $484.81 in 2025.
- 2021: $362.23
- 2022: $273.73
- 2023: $347.48
- 2024: $995.00
- 2025: $484.81
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · 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 – December 31, 2025): 14 records totaling $484.81.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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TIVDAK | General | $124.62 |
| Pfizer Inc. |
Education
In-kind items and services
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— | General | $99.99 |
| SpringWorks Therapeutics, Inc. |
Food and Beverage
In-kind items and services
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GOMEKLI | General | $30.76 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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JEMPERLI | General | $27.80 |
| Eisai Inc. |
Food and Beverage
In-kind items and services
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Lenvima | General | $27.73 |
| Eisai Inc. |
Food and Beverage
In-kind items and services
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Lenvima | General | $25.62 |
| Verastem, Inc. |
Food and Beverage
In-kind items and services
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AVMAPKI FAKZYNJA CO-PACK | General | $24.57 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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JEMPERLI | General | $20.26 |
| Eisai Inc. |
Food and Beverage
In-kind items and services
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Lenvima | General | $20.03 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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TIVDAK | General | $19.18 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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JEMPERLI | General | $19.13 |
| Gilead Sciences, Inc. |
Food and Beverage
In-kind items and services
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— | General | $18.15 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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TIVDAK | General | $14.51 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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TIVDAK | General | $12.46 |
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 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Omeprazole | Omeprazole | 28 | 1,740 | $213.67 | 14 |
| Dexamethasone | Dexamethasone | 20 | 460 | $308.85 | 17 |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 12 | 65 | $44.06 | 11 |
| Prochlorperazine Maleate | Prochlorperazine Maleate | 12 | 97 | $94.51 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSORDER AND REFERRING ONLY - NURSE PRACTITIONER
I20250428000727
CA
8729504311
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
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
Nurse Practitioner
Career & Practice History
NPI enumerated March 04, 2010.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Nurse Practitioners in Orange
- Susanne Porter, NP
- Tiffany Mcvey, NP
- Francis Baltazar, NP
- Julia Liang, NP
- Selina Sladics, NP
- Sheri Jonsson, NP
Mailing Address
1000 W La Veta Ave
Orange, CA 928684304
Phone: 7147346200