James Allen Walla , RN
Nurse Practitioner โข Ann Arbor, MI
4250 Plymouth Rd
Ann Arbor, MI 481092700
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 September 8, 2020; this date does not establish years in practice.
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Published CMS data list 71 Original Medicare Part B services in 2022.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022. Published rows only; this is not a quality measure.
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Published Part B service records, 2022:
- 99214 โ Established patient outpatient office visit: 55 service units.
- 99213 โ Established patient outpatient office visit: 16 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2021 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2022). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
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Published CMS data list 11 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:
- Clonazepam โ 11 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 the full table ยท Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 95% of clinicians listed under Nurse Practitioner in Ann Arbor, MI (2024, 228 clinicians with data). Median for this group: 141. Middle half: 45 to 414.
Fewer Part D prescriptions than 95% of clinicians listed under Nurse Practitioner in Michigan (2024, 1,581 clinicians with data). Median for this group: 360. Middle half: 97 to 1,478.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 51 in 2021 to 71 in 2022.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2021โ2022.
Practice Location & Contact Primary Location
4250 Plymouth Rd
Ann Arbor, MI 481092700
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.
Medicare-allowed amount
About $5,468 in 2022
The total amount Medicare approved for these services in 2022. 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, 2022.
Paid by Medicare
About $4,176 in 2022
The part of the Medicare-allowed amount that Medicare itself paid in 2022, 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, 2022.
30-day fills
11 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
$38 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.
Open Payments general payments, program year 2025
All general payments: $1,421.90 across 74 records.
By nature of payment
- Food and Beverage: $1,421.90 across 74 records.
Reporting-company totals (3 largest of 13)
- Neurocrine BioSciences, Inc.: $310.99 across 10 records.
- Lundbeck LLC: $245.75 across 13 records.
- ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.): $218.08 across 15 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
2020
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, โDoes your provider accept Medicare as full payment?โ
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 James Walla 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 Ann Arbor and Michigan
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 95% of clinicians listed under Nurse Practitioner in Ann Arbor, MI (2024, 228 clinicians with data). Median for this group: 141. Middle half: 45 to 414.
Fewer Part D prescriptions than 95% of clinicians listed under Nurse Practitioner in Michigan (2024, 1,581 clinicians with data). Median for this group: 360. Middle half: 97 to 1,478.
Part D drug cost
A lower Part D drug cost than 95% of clinicians listed under Nurse Practitioner in Ann Arbor, MI (2024, 228 clinicians with data). Median for this group: $8,349. Middle half: $604 to $60,501.
A lower Part D drug cost than 95% of clinicians listed under Nurse Practitioner in Michigan (2024, 1,581 clinicians with data). Median for this group: $24,697. Middle half: $1,472 to $176,540.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for James Walla are from 2022.
704 active clinicians are listed under Nurse Practitioner with a practice address in Ann Arbor, MI (3,576 in Michigan).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Ann Arbor
19.2% of these 704 clinicians have the CMS telehealth indicator.
45.5% of these 704 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 39% from 51 in 2021 to 71 in 2022.
- 2021: 51
- 2022: 71
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Medicare-allowed amount
Medicare-allowed amount increased 25% from $4,358 in 2021 to $5,468 in 2022.
- 2021: $4,358
- 2022: $5,468
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Paid by Medicare
Paid by Medicare increased 22% from $3,426 in 2021 to $4,176 in 2022.
- 2021: $3,426
- 2022: $4,176
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 86% from 81 in 2021 to 11 in 2024.
- 2021: 81
- 2022: 299
- 2023: 57
- 2024: 11
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30-day fills
30-day fills decreased 94% from 174 in 2021 to 11 in 2024.
- 2021: 174
- 2022: 569
- 2023: 140
- 2024: 11
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Part D drug cost
Part D drug cost decreased 98% from $2,305 in 2021 to $38 in 2024.
- 2021: $2,305
- 2022: $7,168
- 2023: $2,375
- 2024: $38
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $45.03 in 2023 to $1,421.90 in 2025.
- 2023: $45.03
- 2024: $750.03
- 2025: $1,421.90
Sources: CMS Medicare Physician & Other Practitioners (2022), 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 ยท 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 โ December 31, 2025): 74 records totaling $1,421.90.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Neurocrine BioSciences, Inc. |
Food and Beverage
In-kind items and services
|
INGREZZA | General | $128.07 |
| Vanda Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
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HETLIOZ | General | $38.55 |
| Vanda Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
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HETLIOZ | General | $36.89 |
| Alkermes, Inc. |
Food and Beverage
In-kind items and services
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ARISTADA | General | $34.64 |
| Lundbeck LLC |
Food and Beverage
Cash or cash equivalent
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REXULTI | General | $28.66 |
| Lundbeck LLC |
Food and Beverage
Cash or cash equivalent
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REXULTI | General | $28.02 |
| Vanda Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
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HETLIOZ | General | $27.57 |
| Teva Pharmaceuticals USA, Inc. |
Food and Beverage
In-kind items and services
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AUSTEDO XR | General | $27.13 |
| Neurocrine BioSciences, Inc. |
Food and Beverage
In-kind items and services
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INGREZZA | General | $27.03 |
| Otsuka America Pharmaceutical, Inc. |
Food and Beverage
In-kind items and services
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ABILIFY MAINTENA | General | $26.83 |
| Neurocrine BioSciences, Inc. |
Food and Beverage
In-kind items and services
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INGREZZA | General | $25.35 |
| ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) |
Food and Beverage
In-kind items and services
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CAPLYTA | General | $24.82 |
| Neurocrine BioSciences, Inc. |
Food and Beverage
In-kind items and services
|
INGREZZA | General | $24.77 |
| Alkermes, Inc. |
Food and Beverage
In-kind items and services
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ARISTADA | General | $24.76 |
| Lundbeck LLC |
Food and Beverage
Cash or cash equivalent
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REXULTI | General | $24.41 |
| Collegium Pharmaceutical, Inc. |
Food and Beverage
Cash or cash equivalent
|
Jornay PM | General | $24.38 |
| Neurocrine BioSciences, Inc. |
Food and Beverage
In-kind items and services
|
INGREZZA | General | $23.17 |
| Lundbeck LLC |
Food and Beverage
Cash or cash equivalent
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REXULTI | General | $23.08 |
| Supernus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
Qelbree | General | $23.01 |
| Collegium Pharmaceutical, Inc. |
Food and Beverage
Cash or cash equivalent
|
Jornay PM | General | $22.10 |
| Supernus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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Qelbree | General | $21.78 |
| Sage Therapeutics, LLC |
Food and Beverage
In-kind items and services
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ZURZUVAE | General | $21.63 |
| ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) |
Food and Beverage
In-kind items and services
|
CAPLYTA | General | $21.29 |
| Neurocrine BioSciences, Inc. |
Food and Beverage
In-kind items and services
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INGREZZA | General | $20.66 |
| Otsuka America Pharmaceutical, Inc. |
Food and Beverage
In-kind items and services
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ABILIFY MAINTENA | General | $20.56 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2020โ2021 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, 2021โ2022; 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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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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55 | 22 | $124.05 | $84.20 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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16 | 13 | $106.44 | $52.30 |
Source: CMS Part B by Provider and Service, 2022; 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 |
|---|---|---|---|---|---|
| Clonazepam | Clonazepam | 11 | 307 | $38.31 | 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: 2021-03-19NUCC 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 PECOSSources: 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.
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Nurse Practitioner
Nurse Practitioner
Psychiatry & Neurology - Child & Adolescent Psychiatry
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 4250 PLYMOUTH RD, ANN ARBOR, MI 481092700 (Tel: 7347646443)
Registered at 3621 S STATE ST, ANN ARBOR, MI 481081633 (Tel: 7346475299)
Nurse Practitioner (license number reported to NPPES: MI 4704267270)
NPI status registered as active in NPPES database
Registered at 279 SUMMIT DR STE 200, WATERFORD, MI 483283364 (Tel: 2484091105)
Registered at 15551 NORTHVILLE FOREST DR APT 260, PLYMOUTH, MI 481704949
Recorded as JAMES WALLA, RN
Registered Nurse (license number reported to NPPES: MI 4704267270)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Nurse Practitioners in Ann Arbor
- Sally Villasenor, NP
- Dr. Tiffany Hornbeck, DNP
- Aimee Seaman, NP
- Teresa Konopka, NP
- Andrea Douglas, AGACNP-DNP
- Chelsea Malburg, NP
Mailing Address
3621 S State St
Ann Arbor, MI 481081633
Phone: 7346475299