Cassandra Chambers , APRN
Nurse Practitioner โข Chester, IL
1900 State St
Chester, IL 622331116
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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Cassandra Chambers is listed in NPPES under Nurse Practitioner.
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NPI assigned on July 27, 2019; this date does not establish years in practice.
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Published CMS data list 365 Original Medicare Part B services in 2023.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023. Published rows only; this is not a quality measure.
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Published Part B service records, 2023:
- 99214 โ Established patient outpatient office visit: 143 service units.
- 99215 โ Established patient outpatient office visit: 122 service units.
- 99214 โ Established patient outpatient office visit: 45 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2022 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2023). CPT notice
See all 6 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 990 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:
- Prednisone โ 69 prescription fills, including refills.
- Atorvastatin Calcium โ 66 prescription fills, including refills.
- Gabapentin โ 60 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 40 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 75% of clinicians listed under Nurse Practitioner in Illinois (2024, 2,574 clinicians with data). Median for this group: 258. Middle half: 80 to 914.
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 21 in 2019 to 365 in 2023.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2019โ2023.
Practice Location & Contact Primary Location
1900 State St
Chester, IL 622331116
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 Steeleville, IL. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Memorial Hospital. 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
2019
What Public CMS Data Show
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $42,838 in 2023
The total amount Medicare approved for these services in 2023. 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, 2023.
Paid by Medicare
About $29,030 in 2023
The part of the Medicare-allowed amount that Medicare itself paid in 2023, 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, 2023.
30-day fills
1,457 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
$38,516 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: $88.29 across 4 records.
By nature of payment
- Food and Beverage: $88.29 across 4 records.
Reporting-company totals
- Merck Sharp & Dohme LLC: $42.49 across 2 records.
- ABBVIE INC.: $29.31 across 1 record.
- Novartis Pharmaceuticals Corporation: $16.49 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 2025 (published June 30, 2026).
Years since graduation
7 years (graduated 2019)
CMS Doctors and Clinicians data list 2019 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
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; 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.
Enrolled in Medicare (PECOS)
Cassandra Chambers 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 Cassandra Chambers 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 Chester and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 75% of clinicians listed under Nurse Practitioner in Illinois (2024, 2,574 clinicians with data). Median for this group: 258. Middle half: 80 to 914.
Too few clinicians listed under Nurse Practitioner in Chester have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 60% of clinicians listed under Nurse Practitioner in Illinois (2024, 2,574 clinicians with data). Median for this group: $10,784. Middle half: $979 to $113,500.
Too few clinicians listed under Nurse Practitioner in Chester have Medicare Part D data for 2024 to compare.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Cassandra Chambers are from 2023.
2 active clinicians are listed under Nurse Practitioner with a practice address in Chester, IL (4,989 in Illinois).
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 B services
Medicare Part B services increased 1638% from 21 in 2019 to 365 in 2023.
- 2019: 21
- 2020: 435
- 2021: 815
- 2022: 640
- 2023: 365
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Medicare-allowed amount
Medicare-allowed amount increased 2334% from $1,760 in 2019 to $42,838 in 2023.
- 2019: $1,760
- 2020: $34,358
- 2021: $86,997
- 2022: $69,075
- 2023: $42,838
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Paid by Medicare
Paid by Medicare increased 2061% from $1,344 in 2019 to $29,030 in 2023.
- 2019: $1,344
- 2020: $24,783
- 2021: $64,660
- 2022: $51,381
- 2023: $29,030
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 342% from 224 in 2020 to 990 in 2024.
- 2020: 224
- 2021: 984
- 2022: 1,551
- 2023: 1,249
- 2024: 990
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30-day fills
30-day fills increased 312% from 354 in 2020 to 1,457 in 2024.
- 2020: 354
- 2021: 1,775
- 2022: 3,160
- 2023: 2,329
- 2024: 1,457
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Part D drug cost
Part D drug cost increased 84% from $20,890 in 2020 to $38,516 in 2024.
- 2020: $20,890
- 2021: $72,893
- 2022: $209,335
- 2023: $210,844
- 2024: $38,516
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $40.23 in 2021 to $88.29 in 2025.
- 2021: $40.23
- 2022: $45.46
- 2023: $57.89
- 2024: $14.45
- 2025: $88.29
Sources: CMS Medicare Physician & Other Practitioners (2023), 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): fewer than 11 records totaling $88.29.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
CREON | General | $29.31 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
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VAXNEUVANCE | General | $21.52 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
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CAPVAXIVE | General | $20.97 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
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LEQVIO | General | $16.49 |
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 2018โ2022 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, 2019โ2023; 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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143 | 138 | $255.00 | $97.75 |
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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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122 | 118 | $345.00 | $142.17 |
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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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45 | 35 | $255.00 | $82.16 |
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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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27 | 19 | $345.00 | $120.55 |
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99205
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more
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15 | 15 | $500.00 | $183.71 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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13 | 13 | $395.00 | $139.00 |
Source: CMS Part B by Provider and Service, 2023; 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 |
|---|---|---|---|---|---|
| Prednisone | Prednisone | 69 | 399 | $102.12 | 65 |
| Atorvastatin Calcium | Atorvastatin Calcium | 66 | 4,675 | $441.78 | 32 |
| Gabapentin | Gabapentin | 60 | 2,477 | $675.32 | 25 |
| Levothyroxine Sodium | Levothyroxine Sodium | 45 | 2,370 | $170.15 | 12 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 43 | 316 | $270.00 | 42 |
| Doxycycline Hyclate | Doxycycline Hyclate | 42 | 344 | $362.66 | 35 |
| Warfarin Sodium | Warfarin Sodium | 38 | 1,123 | $176.06 | โ |
| Tramadol Hcl | Tramadol Hcl | 37 | 813 | $118.91 | 23 |
| Losartan Potassium | Losartan Potassium | 36 | 2,218 | $283.82 | 15 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 34 | 837 | $756.42 | 24 |
| Lorazepam | Lorazepam | 33 | 918 | $200.38 | 19 |
| Metoprolol Succinate | Metoprolol Succinate | 31 | 2,100 | $248.44 | 19 |
| Lisinopril | Lisinopril | 26 | 1,606 | $115.42 | 16 |
| Hydrochlorothiazide | Hydrochlorothiazide | 26 | 1,920 | $86.10 | 11 |
| Furosemide | Furosemide | 24 | 1,305 | $63.55 | 15 |
| Amlodipine Besylate | Amlodipine Besylate | 22 | 1,020 | $70.01 | โ |
| Carvedilol | Carvedilol | 22 | 960 | $100.12 | โ |
| Fluticasone Propionate | Fluticasone Propionate | 21 | 1,020 | $243.97 | 11 |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 20 | 140 | $67.01 | 17 |
| Metformin Hcl | Metformin Hcl | 19 | 1,110 | $75.21 | โ |
| Farxiga | Dapagliflozin Propanediol | 19 | 750 | $14,232.77 | โ |
| Alprazolam | Alprazolam | 17 | 764 | $162.58 | โ |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 17 | 750 | $108.85 | โ |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 16 | 415 | $373.67 | โ |
| Xarelto | Rivaroxaban | 16 | 480 | $8,990.88 | โ |
(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
Self-certified to NPPES: 2025-01-22NUCC 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: 207RC0000X
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NURSE PRACTITIONER
I20191025000054
IL
9739411695
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
Memorial Hospital
1900 State St, Chester, IL 622331116
Phone: 6188264581
Secondary Practice Locations
602 W Shawneetown Trl
Steeleville, IL 622881126
Phone: 6189653382
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant
Physician Assistant (Certified)
Family Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner
Master of Science in Nursing
Nurse Practitioner - Family
Certified Nurse Practitioner
Physician Assistant
Physician Assistant (Certified)
Family Medicine
Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 1900 STATE ST, CHESTER, IL 622331116 (Tel: 6188262388)
Additional practice office at 602 W Shawneetown Trl, Steeleville, IL 622881126
Registered at 2319 OLD PLANK RD, CHESTER, IL 622331153 (Tel: 6188262388)
Registered at 1900 STATE ST, CHESTER, IL 622331116 (Tel: 6188264581)
Internal Medicine (license number reported to NPPES: IL 209019678)
NPI status registered as active in NPPES database
Registered at 409 W OAK ST, CARBONDALE, IL 629011464 (Tel: 6185294455)
Registered at PO BOX 3988, CARBONDALE, IL 629023988 (Tel: 6184575200)
Recorded as CASSANDRA CHAMBERS, APRN
Nurse Practitioner (license number reported to NPPES: IL 209019678)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
1900 State St
Chester, IL 622331116
Phone: 6188264581