Ellen M Walker , PA-C
Physician Assistant โข Ypsilanti, MI
Iha Neurology, 5333 Mcauley Drive Ste 6109
Ypsilanti, MI 48197
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 February 1, 2019; this date does not establish years in practice.
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Published CMS data list 269 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99215 โ Established patient outpatient office visit: 205 service units.
- G2212 โ Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or: 29 service units.
- 99223 โ Initial hospital care with moderate level of medical decision making: 23 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 4 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 279 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Topiramate โ 41 prescription fills, including refills.
- Donepezil Hcl โ 38 prescription fills, including refills.
- Levetiracetam โ 34 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 13 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 65% of clinicians listed under Physician Assistant in Ypsilanti, MI (2024, 87 clinicians with data). Median for this group: 162. Middle half: 62 to 331.
More Medicare Part B services than 70% of clinicians listed under Physician Assistant in Michigan (2024, 3,297 clinicians with data). Median for this group: 134. Middle half: 59 to 292.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 22 in 2022 to 269 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022โ2024.
Practice Location & Contact Primary Location
Iha Neurology
5333 Mcauley Drive Ste 6109
Ypsilanti, MI 48197
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Iha Health Services Corporation. See the list
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
2022
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
200 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $36,971 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $28,137 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
395 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
$16,692 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 โ by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021โ2025.
Years since graduation
4 years (graduated 2022)
CMS Doctors and Clinicians data list 2022 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished 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, CMS release of October 2, 2026.
NPI first issued
2019
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.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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, CMS release of October 2, 2026; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Ellen 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 Ellen 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 Ypsilanti and Michigan
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 65% of clinicians listed under Physician Assistant in Ypsilanti, MI (2024, 87 clinicians with data). Median for this group: 162. Middle half: 62 to 331.
More Medicare Part B services than 70% of clinicians listed under Physician Assistant in Michigan (2024, 3,297 clinicians with data). Median for this group: 134. Middle half: 59 to 292.
Medicare-allowed amount
A higher Medicare-allowed amount than 90% of clinicians listed under Physician Assistant in Ypsilanti, MI (2024, 87 clinicians with data). Median for this group: $14,430. Middle half: $6,270 to $26,561.
A higher Medicare-allowed amount than 85% of clinicians listed under Physician Assistant in Michigan (2024, 3,297 clinicians with data). Median for this group: $10,685. Middle half: $4,963 to $20,340.
Paid by Medicare
A higher Medicare payment amount than 95% of clinicians listed under Physician Assistant in Ypsilanti, MI (2024, 87 clinicians with data). Median for this group: $10,648. Middle half: $4,863 to $19,951.
A higher Medicare payment amount than 85% of clinicians listed under Physician Assistant in Michigan (2024, 3,297 clinicians with data). Median for this group: $7,786. Middle half: $3,622 to $14,974.
Medicare Part D prescriptions
More Part D prescriptions than 70% of clinicians listed under Physician Assistant in Ypsilanti, MI (2024, 88 clinicians with data). Median for this group: 114. Middle half: 45 to 304.
Close to the middle for clinicians listed under Physician Assistant in Michigan (2024, 3,756 clinicians with data). Median for this group: 301. Middle half: 83 to 1,058.
Part D drug cost
A higher Part D drug cost than 65% of clinicians listed under Physician Assistant in Ypsilanti, MI (2024, 88 clinicians with data). Median for this group: $1,326. Middle half: $222 to $39,917.
Close to the middle for clinicians listed under Physician Assistant in Michigan (2024, 3,756 clinicians with data). Median for this group: $6,017. Middle half: $670 to $116,880.
171 active clinicians are listed under Physician Assistant with a practice address in Ypsilanti, MI (7,169 in Michigan).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Ypsilanti
19.3% of these 171 clinicians have the CMS telehealth indicator.
76.6% of these 171 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 B services
Medicare Part B services increased 1123% from 22 in 2022 to 269 in 2024.
- 2022: 22
- 2023: 174
- 2024: 269
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Medicare-allowed amount
Medicare-allowed amount increased 972% from $3,450 in 2022 to $36,971 in 2024.
- 2022: $3,450
- 2023: $25,285
- 2024: $36,971
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Paid by Medicare
Paid by Medicare increased 968% from $2,634 in 2022 to $28,137 in 2024.
- 2022: $2,634
- 2023: $18,627
- 2024: $28,137
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 21% from 231 in 2023 to 279 in 2024.
- 2023: 231
- 2024: 279
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30-day fills
30-day fills increased 15% from 343 in 2023 to 395 in 2024.
- 2023: 343
- 2024: 395
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Part D drug cost
Part D drug cost decreased 25% from $22,131 in 2023 to $16,692 in 2024.
- 2023: $22,131
- 2024: $16,692
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2021โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2022โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
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205 | 159 | $341.76 | $154.28 |
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G2212
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or
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29 | 19 | $61.00 | $27.90 |
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99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
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23 | 23 | $384.00 | $143.08 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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12 | 12 | $256.50 | $103.67 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
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 |
|---|---|---|---|---|---|
| Topiramate | Topiramate | 41 | 1,513 | $315.24 | 12 |
| Donepezil Hcl | Donepezil Hcl | 38 | 1,650 | $325.80 | 13 |
| Levetiracetam | Levetiracetam | 34 | 1,993 | $892.64 | 15 |
| Carbidopa-Levodopa | Carbidopa/Levodopa | 32 | 1,539 | $622.43 | 15 |
| Gabapentin | Gabapentin | 30 | 1,283 | $596.37 | 15 |
| Lacosamide | Lacosamide | 17 | 509 | $467.92 | โ |
| Pregabalin | Pregabalin | 16 | 770 | $343.82 | โ |
| Emgality Pen | Galcanezumab-Gnlm | 15 | 506 | $11,727.84 | โ |
| Memantine Hcl | Memantine Hcl | 12 | 490 | $689.45 | โ |
| Sumatriptan Succinate | Sumatriptan Succinate | 11 | 345 | $60.94 | โ |
| Tizanidine Hcl | Tizanidine Hcl | 11 | 390 | $110.86 | โ |
| Rizatriptan | Rizatriptan Benzoate | 11 | 215 | $139.59 | โ |
| Levetiracetam Er | Levetiracetam | 11 | 450 | $399.41 | โ |
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: 2023-08-24NUCC 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: 246ZE0600X
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 PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20221011000842
MI
0749666022
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, CMS release of October 2, 2026
Iha Health Services Corporation
128 Van Buren St, Chelsea, MI 481181623
Phone: 7344758677
Iha Health Services Corporation
14555 Levan Rd, Livonia, MI 481545085
Iha Health Services Corporation
44428 Woodward Ave, Pontiac, MI 483415009
Phone: 7347128700
Iha Health Services Corporation
51341 W Huron River Dr, Van Buren, MI 481112571
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Psychiatry & Neurology - Neurology
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Neurology
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant
Physician Assistant (Certified)
Psychiatry & Neurology - Neurology
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Recorded as ELLEN WALKER, PA-C
Registered at IHA NEUROLOGY, 5333 MCAULEY DRIVE STE 6109, YPSILANTI, MI 48197 (Tel: 7347121400)
Registered at 24 FRANK LLOYD WRIGHT DRIVE, SUITE J2000, ANN ARBOR, MI 48105
Registered at 5333 MCAULEY DR RM 6109, YPSILANTI, MI 481971005 (Tel: 7347121400)
Registered at 5333 MCAULEY DR RM 6109, YPSILANTI, MI 481971005
Recorded as ELLEN MILLER, PA-C
NPI status registered as active in NPPES database
Registered at 31330 SCHOOLCRAFT RD STE 200, LIVONIA, MI 481502042 (Tel: 7345259712)
Registered at 5801 S MCCLINTOCK DR STE 100, TEMPE, AZ 852836002 (Tel: 4807770607)
Recorded as ELLEN MILLER
Specialist/Technologist, Other
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Ypsilanti
- Stacey Day
- Daniel Shonnard, PA-C
- Michael Francis, PA-C
- Kevin Ryan, PA-C
- Anahit Movsesyan, PA
- Erin Moser
Mailing Address
24 Frank Lloyd Wright Drive, Suite J2000
Ann Arbor, MI 48105