Diane Whitney Walker , NP
Nurse Practitioner • Winchester, VA
905 Cedar Creek Grade, Suite 101
Winchester, VA 226017100
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 2, 2005; this date does not establish years in practice.
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Published CMS data list 1,249 Original Medicare Part B services in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Published rows only; this is not a quality measure.
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Published Part B service records, 2020:
- 99211 — outpatient office visit: 298 service units.
- 99334 — Established patient custodial care facility, group care, or assisted living visit: 236 service units.
- 99307 — Subsequent nursing facility care with straightforward level of medical decision making, per day: 133 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2019 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2020). CPT notice
See all 12 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 11 Medicare Part D prescriptions, including refills, in 2023.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023. Published rows only; this is not a quality measure.
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Published Part D records, 2023:
- Lumigan (Bimatoprost) — 11 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Medicare Part B services went from 2,216 in 2019 to 1,249 in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2019–2020.
Practice Location & Contact Primary Location
905 Cedar Creek Grade
Suite 101
Winchester, VA 226017100
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 $50,188 in 2020
The total amount Medicare approved for these services in 2020. 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 – by Provider and Service, 2020.
Paid by Medicare
About $35,023 in 2020
The part of the Medicare-allowed amount that Medicare itself paid in 2020, 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 – by Provider and Service, 2020.
30-day fills
11 standardized 30-day fills in 2023
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
$2,934 in 2023
The total cost of these prescriptions in 2023, 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, 2023.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021–2025.
NPI first issued
2005
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.
Compared with the same specialty in Winchester and Virginia
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Diane Walker are from 2020.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Diane Walker are from 2023.
43 active clinicians are listed under Nurse Practitioner with a practice address in Winchester, VA (1,722 in Virginia).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Winchester
18.6% of these 43 clinicians have the CMS telehealth indicator.
60.5% of these 43 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 decreased 44% from 2,216 in 2019 to 1,249 in 2020.
- 2019: 2,216
- 2020: 1,249
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Medicare-allowed amount
Medicare-allowed amount decreased 39% from $82,354 in 2019 to $50,188 in 2020.
- 2019: $82,354
- 2020: $50,188
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Paid by Medicare
Paid by Medicare decreased 48% from $66,732 in 2019 to $35,023 in 2020.
- 2019: $66,732
- 2020: $35,023
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 98% from 707 in 2019 to 11 in 2023.
- 2019: 707
- 2020: 1,209
- 2021: 147
- 2022: 25
- 2023: 11
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30-day fills
30-day fills decreased 99% from 806 in 2019 to 11 in 2023.
- 2019: 806
- 2020: 1,365
- 2021: 151
- 2022: 25
- 2023: 11
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Part D drug cost
Part D drug cost decreased 81% from $15,817 in 2019 to $2,934 in 2023.
- 2019: $15,817
- 2020: $86,058
- 2021: $10,507
- 2022: $3,666
- 2023: $2,934
Sources: CMS Medicare Physician & Other Practitioners (2020), CMS Medicare Part D Prescribers (2023), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2018–2019 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 – by Provider and Service data, 2019–2020; 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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99211
Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional
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298 | 24 | $22.80 | $19.63 |
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99334
Established patient custodial care facility, group care, or assisted living visit, typically 15 minutes
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236 | 49 | $60.75 | $51.48 |
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99307
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes
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133 | 40 | $44.31 | $37.53 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
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122 | 88 | $45.25 | $38.67 |
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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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117 | 79 | $74.54 | $63.76 |
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85610
Blood test, clotting time
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116 | 11 | $4.51 | $4.25 |
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99308
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more
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89 | 36 | $69.30 | $58.91 |
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99335
Established patient assisted living visit, typically 25 minutes
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69 | 37 | $95.79 | $81.49 |
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69210
Removal of impacted ear wax
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27 | 23 | $33.51 | $33.38 |
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87804
Detection test by immunoassay with direct visual observation for influenza virus
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18 | 18 | $16.32 | $15.99 |
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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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13 | 13 | $109.21 | $92.57 |
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99336
Established patient assisted living visit, typically 40 minutes
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11 | 11 | $136.51 | $115.29 |
Source: CMS Part B by Provider and Service, 2020; 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 2023.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Lumigan | Bimatoprost | 11 | 275 | $2,934.03 | — |
Source: CMS Part D by Provider and Drug, 2023; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC 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.
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.
Family Medicine
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated June 02, 2005.
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 Nurse Practitioners in Winchester
- Roberta Mccauley, NP
- Janice Roy, NP
- Julie Henderson, NP
- Kimberly Hahn, FNP
- Darah Kinzer, APRN
- Margaret Kelly, FNP
Mailing Address
905 Cedar Creek Grade, Suite 101
Winchester, VA 226017100
Phone: 5407230611