John Walker , PA
Physician Assistant β’ Las Vegas, NV
4475 S Eastern Ave, Suite 222
Las Vegas, NV 891197826
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 June 14, 2006; this date does not establish years in practice.
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Published CMS data list 418 Medicare Part D prescriptions, including refills, in 2014.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2014. Published rows only; this is not a quality measure.
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Published Part D records, 2014:
- Lisinopril β 51 prescription fills, including refills.
- Metformin Hcl β 48 prescription fills, including refills.
- Simvastatin β 37 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2014. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 17 records in the table Β· Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 356 in 2013 to 418 in 2014.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2013β2014.
Practice Location & Contact Primary Location
4475 S Eastern Ave
Suite 222
Las Vegas, NV 891197826
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
785 standardized 30-day fills in 2014
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
$7,586 in 2014
The total cost of these prescriptions in 2014, 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, 2014.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021β2025.
NPI first issued
2006
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 Las Vegas and Nevada
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for John Walker are from 2014.
498 active clinicians are listed under Physician Assistant with a practice address in Las Vegas, NV (1,084 in Nevada).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Las Vegas
12% of these 498 clinicians have the CMS telehealth indicator.
55.2% of these 498 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 increased 17% from 356 in 2013 to 418 in 2014.
- 2013: 356
- 2014: 418
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30-day fills
30-day fills increased 23% from 635 in 2013 to 785 in 2014.
- 2013: 635
- 2014: 785
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Part D drug cost
Part D drug cost decreased 64% from $20,893 in 2013 to $7,586 in 2014.
- 2013: $20,893
- 2014: $7,586
Sources: CMS Medicare Part D Prescribers (2014), 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 2014.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Lisinopril | Lisinopril | 51 | 2,910 | $325.04 | 25 |
| Metformin Hcl | Metformin Hcl | 48 | 2,835 | $591.82 | 16 |
| Simvastatin | Simvastatin | 37 | 2,730 | $324.02 | 19 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 36 | 2,070 | $289.32 | 11 |
| Amlodipine Besylate | Amlodipine Besylate | 34 | 2,100 | $229.90 | 13 |
| Losartan Potassium | Losartan Potassium | 33 | 2,010 | $254.12 | 11 |
| Omeprazole | Omeprazole | 31 | 1,605 | $316.31 | 12 |
| Gabapentin | Gabapentin | 22 | 765 | $388.42 | 11 |
| Clopidogrel | Clopidogrel Bisulfate | 19 | 750 | $167.67 | β |
| Levothyroxine Sodium | Levothyroxine Sodium | 16 | 1,050 | $233.59 | β |
| Proair Hfa | Albuterol Sulfate | 16 | 432 | $1,102.95 | β |
| Metoprolol Tartrate | Metoprolol Tartrate | 13 | 1,065 | $106.44 | β |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 13 | 374 | $498.90 | β |
| Sertraline Hcl | Sertraline Hcl | 13 | 450 | $60.95 | β |
| Cabergoline | Cabergoline | 13 | 364 | $2,168.40 | β |
| Hydrochlorothiazide | Hydrochlorothiazide | 12 | 1,080 | $253.17 | β |
| Lovastatin | Lovastatin | 11 | 660 | $275.26 | β |
Source: CMS Part D by Provider and Drug, 2014; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC 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.
NUCC 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.
NUCC 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.
Additional State Medicaid & Healthcare Payer Identifiers
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant
Physician Assistant
Nurse Practitioner
Advanced Practice Registered Nurse
Career & Practice History
NPI enumerated June 14, 2006.
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 Physician Assistants in Las Vegas
- Izabella Ostolski, PA-C
- Darcie Bouchard, PA-C
- Julia Sung, PA-C
- Nyat Tewolde, PA-C
- Stephanie Atiyeh, PA-C
- Myranda Guillen, PA-C
Mailing Address
Po Box 15645, Credentialing Department
Las Vegas, NV 891145645
Phone: 7027371800