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Walter Glen Speirs , PA-C

Physician Assistant β€’ Mesa, AZ

Active NPI 1326004094 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

7233 E Baseline Rd Ste 126
Mesa, AZ 852095007

Call 6027550800 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

7233 E Baseline Rd Ste 126

Mesa, AZ 852095007

Telephone 6027550800
Fax 6025602721
Other Listings in Public Data

CMS Doctors and Clinicians lists 2 distinct group names: Sierra Nevada Primary Care Physicians A Medical Corporation; Summit Medical Group Arizona Llc. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Medical School

University Of Utah School Of Medicine

Graduation Year

2001

30-day fills

983 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

$57,488 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

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.

Industry payments (Open Payments)

Fewer than 11 payment records totaling $15.91 in 2025

Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.

These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.

General: payments not tied to research, such as meals, travel, consulting or speaking fees.

A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.

Source: CMS Open Payments, program year 2025.

Guide: How to read an Open Payments record

Years since graduation

25 years (graduated 2001)

CMS Doctors and Clinicians data list 2001 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

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.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

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, β€œDoes your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

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.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Walter Speirs 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.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Walter Speirs 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.

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.

Guide: What ordering and referring status means

Compared with the same specialty in Mesa and Arizona

Billing and prescribing volume is not a quality rating.

Medicare Part D prescriptions

More Part D prescriptions than 65% of clinicians listed under Physician Assistant in Mesa, AZ (2024, 144 clinicians with data). Median for this group: 226. Middle half: 82 to 801.

More Part D prescriptions than 60% of clinicians listed under Physician Assistant in Arizona (2024, 1,917 clinicians with data). Median for this group: 260. Middle half: 86 to 858.

Part D drug cost

A higher Part D drug cost than 70% of clinicians listed under Physician Assistant in Mesa, AZ (2024, 144 clinicians with data). Median for this group: $2,540. Middle half: $652 to $59,653.

A higher Part D drug cost than 70% of clinicians listed under Physician Assistant in Arizona (2024, 1,917 clinicians with data). Median for this group: $4,301. Middle half: $765 to $83,048.

472 active clinicians are listed under Physician Assistant with a practice address in Mesa, AZ (3,673 in Arizona).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Mesa

8.3% of these 472 clinicians have the CMS telehealth indicator.

37.1% of these 472 clinicians are listed by CMS as accepting Medicare assignment.

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 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

Open Payments Β· Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $15.91.

Manufacturer Payment Nature Product Type Amount ($)
Exact Sciences Corporation
Food and Beverage
In-kind items and services
Cologuard Collection Kit General $15.91

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.

CMS Part D Β· Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Gabapentin Gabapentin 49 2,572 $610.00 15
Atorvastatin Calcium Atorvastatin Calcium 48 2,825 $331.18 14
Levothyroxine Sodium Levothyroxine Sodium 37 2,248 $463.53 16
Omeprazole Omeprazole 32 2,198 $448.90 13
Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen 30 723 $921.40 11
Lisinopril Lisinopril 28 2,460 $171.38 14
Jardiance Empagliflozin 23 641 $13,349.60 β€”
Metoprolol Succinate Metoprolol Succinate 19 1,470 $335.85 β€”
Rosuvastatin Calcium Rosuvastatin Calcium 19 1,710 $505.74 β€”
Losartan Potassium Losartan Potassium 18 1,320 $109.64 β€”
Eliquis Apixaban 18 1,087 $21,336.19 β€”
Tramadol Hcl Tramadol Hcl 17 472 $126.04 β€”
Alendronate Sodium Alendronate Sodium 17 766 $310.70 β€”
Amlodipine Besylate Amlodipine Besylate 17 1,110 $157.08 β€”
Metformin Hcl Metformin Hcl 16 1,254 $139.19 β€”
Furosemide Furosemide 14 780 $53.78 β€”
Trulicity Dulaglutide 13 476 $16,017.11 β€”
Potassium Chloride Potassium Chloride 12 360 $67.50 β€”
Valsartan-Hydrochlorothiazide Valsartan/Hydrochlorothiazide 12 308 $302.92 β€”
Primidone Primidone 12 360 $92.10 β€”
Albuterol Sulfate Hfa Albuterol Sulfate 12 469 $573.09 β€”
Metoprolol Tartrate Metoprolol Tartrate 11 930 $50.47 β€”
Simvastatin Simvastatin 11 990 $103.28 β€”
Ibuprofen Ibuprofen 11 420 $104.71 β€”
Sumatriptan Succinate Sumatriptan Succinate 11 288 $553.18 β€”

(top 25 shown)

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

Self-certified to NPPES: 2025-02-04
Physician Assistant Primary Specialty

NUCC Taxonomy Code: 363A00000X

License # reported to NPPES AZ 10908

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.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Arizona Medical Board.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - PHYSICIAN ASSISTANT

Medicare Enrollment ID

I20250210002549

Enrollment State Jurisdiction

AZ

PECOS Control ID

0345276952

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File

Sierra Nevada Primary Care Physicians A Medical Corporation

140 Litton Dr, Grass Valley, CA 959455078

Phone: 5302729788277

Summit Medical Group Arizona Llc

14541 W Indian School Rd, Goodyear, AZ 853959243

Phone: 8886986727

Summit Medical Group Arizona Llc

7233 E Baseline Rd, Mesa, AZ 852095007

Phone: 6027550800

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

31 listed
Bright Alvaro , MSN, APN, FNP-BC

Nurse Practitioner - Family

NPI 1477009413

Master of Science in Nursing, Advanced Practice Nurse, Family Nurse Practitioner (Board Certified)

Catherine Mae Aquino , FNP

Nurse Practitioner - Family

NPI 1417628025

Family Nurse Practitioner

Aneta Arzumanova , FNP-C

Nurse Practitioner - Family

NPI 1073236360

Family Nurse Practitioner (Certified)

Brittany Atkinson , FNP

Nurse Practitioner - Family

NPI 1972120798

Family Nurse Practitioner

Laura Cole , FNP

Nurse Practitioner - Family

NPI 1184159741

Family Nurse Practitioner

Dr. David Collins , DO

Family Medicine

NPI 1902303340

Doctor of Osteopathic Medicine (D.O.)

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

15 Historical Events
πŸ“
Updated Practice Location February 04, 2025

Registered at 7233 E BASELINE RD STE 126, MESA, AZ 852095007 (Tel: 6027550800)

πŸ“
Updated Business Mailing Address February 04, 2025

Registered at PO BOX 24981, BELFAST, ME 049152000 (Tel: 8449690686)

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) February 04, 2025

Physician Assistant (license number reported to NPPES: AZ 10908)

πŸ“
Updated Practice Location July 10, 2023

Registered at 844 OLD TUNNEL RD, GRASS VALLEY, CA 959458524 (Tel: 5302749762)

πŸ“
Updated Business Mailing Address July 10, 2023

Registered at 844 OLD TUNNEL RD, GRASS VALLEY, CA 959458524 (Tel: 5302749762)

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) April 28, 2020

Physician Assistant (license number reported to NPPES: CA 22863)

πŸ“
Updated Practice Location December 10, 2018

Registered at 2530 CHESTER KIMM RD, WENATCHEE, WA 988018130 (Tel: 5096637615)

πŸ“
Updated Business Mailing Address December 10, 2018

Registered at 2530 CHESTER KIMM RD, WENATCHEE, WA 988018130 (Tel: 5096637615)

πŸ‘€
Provider Name / Credentials Updated December 10, 2018

Recorded as WALTER SPEIRS, PA-C

βœ…
NPI Profile Active August 25, 2016

NPI status registered as active in NPPES database

πŸ“
Practice Location (Initial Record) August 25, 2016

Registered at 1355 EAST ST, SUITE 200, REDDING, CA 960010801 (Tel: 9702616319)

πŸ“
Business Mailing Address (Initial Record) August 25, 2016

Registered at PO BOX 991901, SUITE 200, REDDING, CA 960991901 (Tel: 5306054260)

πŸ‘€
Provider Name / Credentials (Initial Record) August 25, 2016

Recorded as WALTER SPEIRS, PA

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) August 25, 2016

Physician Assistant (license number reported to NPPES: CO 1476)

🟒
Initial NPI Registration & Enumeration April 21, 2006

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1326004094
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: April 21, 2006
Last Update: February 04, 2025
Sole Proprietor: No

Other Physician Assistants in Mesa

All Physician Assistants in Mesa

Mailing Address

Po Box 24981

Belfast, ME 049152000

Phone: 8449690686

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.