Chad Walker , PA
Physician Assistant • Mapleton, IA
513 S Muckey St
Mapleton, IA 51034
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 August 19, 2016; this date does not establish years in practice.
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Published CMS data list 2,380 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:
- Levothyroxine Sodium — 141 prescription fills, including refills.
- Atorvastatin Calcium — 93 prescription fills, including refills.
- Tamsulosin Hcl — 85 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 70 records in the table · Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 80% of clinicians listed under Physician Assistant in Iowa (2024, 934 clinicians with data). Median for this group: 305. Middle half: 94 to 1,210.
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 4,973 in 2020 to 2,380 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
513 S Muckey St
Mapleton, IA 51034
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Des Moines, IA. 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
4,199 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
$201,354 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.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $12.90 in 2021
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.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
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 2021.
NPI first issued
2016
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.
Can order Medicare-covered services
CMS lists Chad 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 Mapleton and Iowa
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 80% of clinicians listed under Physician Assistant in Iowa (2024, 934 clinicians with data). Median for this group: 305. Middle half: 94 to 1,210.
Too few clinicians listed under Physician Assistant in Mapleton have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 80% of clinicians listed under Physician Assistant in Iowa (2024, 934 clinicians with data). Median for this group: $4,784. Middle half: $711 to $109,573.
Too few clinicians listed under Physician Assistant in Mapleton have Medicare Part D data for 2024 to compare.
1 active clinicians are listed under Physician Assistant with a practice address in Mapleton, IA (1,525 in Iowa).
Addresses are self-reported to NPPES and may be out of date.
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 52% from 4,973 in 2020 to 2,380 in 2024.
- 2020: 4,973
- 2021: 4,192
- 2022: 3,737
- 2023: 3,773
- 2024: 2,380
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30-day fills
30-day fills decreased 45% from 7,638 in 2020 to 4,199 in 2024.
- 2020: 7,638
- 2021: 6,890
- 2022: 6,768
- 2023: 6,753
- 2024: 4,199
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Part D drug cost
Part D drug cost decreased 18% from $244,424 in 2020 to $201,354 in 2024.
- 2020: $244,424
- 2021: $227,732
- 2022: $217,824
- 2023: $260,979
- 2024: $201,354
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2021 only.
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2021), 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 2021 (payments made January 1 – December 31, 2021): fewer than 11 records totaling $12.90.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
EVENITY | General | $12.90 |
Source: CMS Open Payments, program year 2021, 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 |
|---|---|---|---|---|---|
| Levothyroxine Sodium | Levothyroxine Sodium | 141 | 9,224 | $1,345.79 | 39 |
| Atorvastatin Calcium | Atorvastatin Calcium | 93 | 5,912 | $747.24 | 30 |
| Tamsulosin Hcl | Tamsulosin Hcl | 85 | 5,733 | $895.16 | 25 |
| Simvastatin | Simvastatin | 83 | 6,232 | $466.61 | 28 |
| Amlodipine Besylate | Amlodipine Besylate | 81 | 6,357 | $495.71 | 32 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 73 | 3,718 | $723.55 | 20 |
| Pantoprazole Sodium | Pantoprazole Sodium | 67 | 4,017 | $911.22 | 18 |
| Lisinopril | Lisinopril | 65 | 4,499 | $381.81 | 25 |
| Ozempic | Semaglutide | 64 | 2,079 | $67,023.52 | — |
| Losartan Potassium | Losartan Potassium | 61 | 4,665 | $391.37 | 24 |
| Omeprazole | Omeprazole | 60 | 4,110 | $687.75 | 29 |
| Gabapentin | Gabapentin | 59 | 3,116 | $1,271.43 | 18 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 56 | 1,307 | $1,655.49 | 16 |
| Furosemide | Furosemide | 55 | 2,767 | $313.36 | 15 |
| Alprazolam | Alprazolam | 53 | 1,382 | $371.17 | 15 |
| Escitalopram Oxalate | Escitalopram Oxalate | 53 | 2,862 | $457.24 | 15 |
| Metoprolol Succinate | Metoprolol Succinate | 52 | 3,510 | $509.30 | 17 |
| Hydrochlorothiazide | Hydrochlorothiazide | 48 | 3,200 | $60.95 | 16 |
| Lorazepam | Lorazepam | 48 | 849 | $248.48 | — |
| Eliquis | Apixaban | 47 | 2,070 | $39,198.91 | 12 |
| Potassium Chloride | Potassium Chloride | 42 | 2,028 | $683.75 | 15 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 42 | 966 | $1,244.59 | 12 |
| Duloxetine Hcl | Duloxetine Hcl | 41 | 2,082 | $1,159.10 | — |
| Tizanidine Hcl | Tizanidine Hcl | 38 | 1,113 | $465.22 | — |
| Ropinirole Hcl | Ropinirole Hcl | 36 | 1,324 | $551.83 | — |
(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
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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSSources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
6601 Sw 9th St
Des Moines, IA 503156138
Phone: 5156439400
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Family Medicine
DNPARNP
Nurse Practitioner - Women's Health
Advanced Registered Nurse Practitioner
Family Medicine
Doctor of Medicine (M.D.)
Physician Assistant - Medical
Physician Assistant
Nurse Practitioner - Family
Doctor of Nursing Practice, Advanced Registered Nurse Practitioner
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 513 S MUCKEY ST, MAPLETON, IA 51034 (Tel: 7128822234)
Registered at 513 S MUCKEY ST, MAPLETON, IA 510341055 (Tel: 7128822234)
NPI status registered as active in NPPES database
Registered at 6601 SW 9TH ST, DES MOINES, IA 503156138 (Tel: 5156439400)
Registered at PO BOX 1475, DES MOINES, IA 503051475 (Tel: 5156439400)
Recorded as CHAD WALKER, PA
Physician Assistant (license number reported to NPPES: IA 083650)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
513 S Muckey St
Mapleton, IA 510341055
Phone: 7128822234