Kari J Williams , NP
Nurse Practitioner โข Phoenix, AZ
5777 E Mayo Blvd
Phoenix, AZ 850544502
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 July 26, 2006; this date does not establish years in practice.
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Published CMS data list 454 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: 176 service units.
- 99214 โ Established patient outpatient office visit: 87 service units.
- 99233 โ Subsequent hospital care with moderate levelof medical decision making: 81 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 7 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 472 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:
- Oxycodone Hcl โ 86 prescription fills, including refills.
- Fentanyl โ 62 prescription fills, including refills.
- Gabapentin โ 45 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 17 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 Nurse Practitioner in Phoenix, AZ (2024, 118 clinicians with data). Median for this group: 190. Middle half: 85 to 639.
More Medicare Part B services than 60% of clinicians listed under Nurse Practitioner in Arizona (2024, 618 clinicians with data). Median for this group: 304. Middle half: 114 to 768.
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 187 in 2020 to 454 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
5777 E Mayo Blvd
Phoenix, AZ 850544502
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: Mayo Clinic Arizona. 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
2005
What Public CMS Data Show
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
160 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 $49,771 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 $39,050 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
512 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
$21,889 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 2024
All general payments: $164.17 across 3 records.
By nature of payment
- Food and Beverage: $164.17 across 3 records.
Reporting-company totals
- Pfizer Inc.: $81.55 across 1 record.
- Averitas Pharma Inc.: $65.96 across 1 record.
- BeiGene USA, Inc.: $16.66 across 1 record.
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 2024 (published June 30, 2026).
Years since graduation
21 years (graduated 2005)
CMS Doctors and Clinicians data list 2005 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.
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.
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; 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.
Enrolled in Medicare (PECOS)
Kari Williams 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 Kari Williams 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 Phoenix and Arizona
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 65% of clinicians listed under Nurse Practitioner in Phoenix, AZ (2024, 118 clinicians with data). Median for this group: 190. Middle half: 85 to 639.
More Medicare Part B services than 60% of clinicians listed under Nurse Practitioner in Arizona (2024, 618 clinicians with data). Median for this group: 304. Middle half: 114 to 768.
Medicare-allowed amount
A higher Medicare-allowed amount than 70% of clinicians listed under Nurse Practitioner in Phoenix, AZ (2024, 118 clinicians with data). Median for this group: $18,033. Middle half: $6,768 to $53,702.
A higher Medicare-allowed amount than 65% of clinicians listed under Nurse Practitioner in Arizona (2024, 618 clinicians with data). Median for this group: $24,217. Middle half: $9,430 to $60,508.
Paid by Medicare
A higher Medicare payment amount than 70% of clinicians listed under Nurse Practitioner in Phoenix, AZ (2024, 118 clinicians with data). Median for this group: $13,808. Middle half: $4,830 to $42,217.
A higher Medicare payment amount than 70% of clinicians listed under Nurse Practitioner in Arizona (2024, 618 clinicians with data). Median for this group: $17,824. Middle half: $6,512 to $45,984.
Medicare Part D prescriptions
More Part D prescriptions than 60% of clinicians listed under Nurse Practitioner in Phoenix, AZ (2024, 145 clinicians with data). Median for this group: 265. Middle half: 61 to 1,010.
Close to the middle for clinicians listed under Nurse Practitioner in Arizona (2024, 705 clinicians with data). Median for this group: 368. Middle half: 91 to 1,188.
Part D drug cost
Close to the middle for clinicians listed under Nurse Practitioner in Phoenix, AZ (2024, 145 clinicians with data). Median for this group: $13,396. Middle half: $1,061 to $135,869.
Close to the middle for clinicians listed under Nurse Practitioner in Arizona (2024, 705 clinicians with data). Median for this group: $19,716. Middle half: $1,586 to $167,412.
334 active clinicians are listed under Nurse Practitioner with a practice address in Phoenix, AZ (1,430 in Arizona).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Phoenix
14.7% of these 334 clinicians have the CMS telehealth indicator.
44.3% of these 334 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 143% from 187 in 2020 to 454 in 2024.
- 2020: 187
- 2021: 142
- 2022: 187
- 2023: 304
- 2024: 454
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Medicare-allowed amount
Medicare-allowed amount increased 197% from $16,779 in 2020 to $49,771 in 2024.
- 2020: $16,779
- 2021: $13,653
- 2022: $20,232
- 2023: $32,395
- 2024: $49,771
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Paid by Medicare
Paid by Medicare increased 193% from $13,337 in 2020 to $39,050 in 2024.
- 2020: $13,337
- 2021: $10,815
- 2022: $15,979
- 2023: $25,458
- 2024: $39,050
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 11 in 2020 to 472 in 2024.
- 2020: 11
- 2022: 13
- 2023: 120
- 2024: 472
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30-day fills
30-day fills went from 11 in 2020 to 512 in 2024.
- 2020: 11
- 2022: 13
- 2023: 135
- 2024: 512
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Part D drug cost
Part D drug cost increased 335% from $5,037 in 2020 to $21,889 in 2024.
- 2020: $5,037
- 2022: $326
- 2023: $8,568
- 2024: $21,889
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2024 only.
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), 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 2024 (payments made January 1 โ December 31, 2024): fewer than 11 records totaling $164.17.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
NURTEC ODT | General | $81.55 |
| Averitas Pharma Inc. |
Food and Beverage
In-kind items and services
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QUTENZA | General | $65.96 |
| BeiGene USA, Inc. |
Food and Beverage
In-kind items and services
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BRUKINSA | General | $16.66 |
Source: CMS Open Payments, program year 2024, 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 2016โ2023 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, 2017โ2024; 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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176 | 89 | $545.00 | $146.07 |
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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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87 | 56 | $340.00 | $100.79 |
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99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
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81 | 33 | $390.00 | $96.61 |
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G2211
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
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39 | 19 | $75.00 | $12.82 |
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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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32 | 27 | $670.00 | $141.15 |
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99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
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20 | 13 | $280.00 | $64.18 |
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99497
Advance care planning, first 30 minutes
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19 | 15 | $255.00 | $61.47 |
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 |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 86 | 1,263 | $1,745.12 | 41 |
| Fentanyl | Fentanyl | 62 | 1,800 | $8,800.81 | 21 |
| Gabapentin | Gabapentin | 45 | 1,576 | $585.57 | 17 |
| Olanzapine | Olanzapine | 38 | 1,226 | $618.18 | 18 |
| Hydromorphone Hcl | Hydromorphone Hcl | 37 | 411 | $665.12 | 16 |
| Buprenorphine | Buprenorphine | 25 | 700 | $6,476.59 | โ |
| Duloxetine Hcl | Duloxetine Hcl | 24 | 870 | $376.68 | โ |
| Morphine Sulfate Er | Morphine Sulfate | 23 | 680 | $368.60 | โ |
| Pregabalin | Pregabalin | 20 | 603 | $159.73 | โ |
| Morphine Sulfate | Morphine Sulfate | 19 | 282 | $537.02 | โ |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 15 | 870 | $220.03 | โ |
| Pantoprazole Sodium | Pantoprazole Sodium | 14 | 420 | $29.16 | โ |
| Ondansetron Odt | Ondansetron | 14 | 158 | $235.95 | โ |
| Prochlorperazine Maleate | Prochlorperazine Maleate | 14 | 177 | $236.92 | โ |
| Hydroxyzine Hcl | Hydroxyzine Hcl | 12 | 367 | $219.39 | โ |
| Ondansetron Hcl | Ondansetron Hcl | 12 | 155 | $76.22 | โ |
| Methylphenidate Hcl | Methylphenidate Hcl | 12 | 420 | $538.36 | 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: 2020-10-06NUCC 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.
NUCC Taxonomy Code: 207RP1001X
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
NUCC Taxonomy Code: 363LA2200X
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NURSE PRACTITIONER
I20060215000629
AZ
1052326840
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
Mayo Clinic Arizona
5777 E Mayo Blvd, Phoenix, AZ 850544502
Phone: 8006030558
Mayo Clinic Arizona
5777 E Mayo Blvd, Phoenix, AZ 850544502
Mayo Clinic Arizona
5701 E Mayo Blvd, Phoenix, AZ 850544502
Phone: 4803424200
Mayo Clinic Arizona
5779 E Mayo Blvd, Phoenix, AZ 850544502
Phone: 4803018000
Mayo Clinic Arizona
13400 E Shea Blvd, Scottsdale, AZ 852595404
Phone: 4803018000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Bachelor of Medicine, Bachelor of Surgery (M.B.B.S.)
Psychiatry & Neurology - Neurology
Doctor of Medicine (M.D.)
Nurse Anesthetist, Certified Registered
Registered Nurse
Radiology - Diagnostic Radiology
Doctor of Medicine (M.D.)
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant
Career & Practice History
NPI enumerated July 26, 2006.
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 Phoenix
- Bridget Blansfield, FNP-C
- Jodi Strand, FNP-C
- Marisa Rebeka, NP
- Kristina Werner, NP
- Suzanne Weinrich, NP-C
- Shawna Underwood, FNP-C
Mailing Address
5777 E Mayo Blvd
Phoenix, AZ 850544502
Phone: 4803018000