Cassandra Blair Willison , PA-C
Physician Assistant • Baltimore, MD
4940 Eastern Ave
Baltimore, MD 21224
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 Willison is listed in NPPES under Physician Assistant.
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NPI assigned on July 3, 2017; this date does not establish years in practice.
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Published CMS data list 247 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99205 — New patient outpatient office visit: 70 service units.
- 99215 — Established patient outpatient office visit: 70 service units.
- 99204 — New patient outpatient office visit: 54 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® 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 · Guide: How to read Medicare Part B data
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Published CMS data list 95 Medicare Part D prescriptions, including refills, in 2021.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2021. Published rows only; this is not a quality measure.
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Published Part D records, 2021:
- Gabapentin — 42 prescription fills, including refills.
- Oxycodone Hcl — 27 prescription fills, including refills.
- Cyclobenzaprine Hcl — 14 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2021. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 4 records in the table · 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 Baltimore, MD (2024, 467 clinicians with data). Median for this group: 133. Middle half: 56 to 326.
Close to the middle for Medicare Part B services among clinicians listed under Physician Assistant in Maryland (2024, 1,553 clinicians with data). Median for this group: 283. Middle half: 85 to 795.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 28 in 2021 to 247 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2021–2024.
Practice Location & Contact Primary Location
4940 Eastern Ave
Baltimore, MD 21224
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: Johns Hopkins University. 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
2017
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
218 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 – by Provider, 2024.
Medicare-allowed amount
About $27,582 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 – by Provider and Service, 2024.
Paid by Medicare
About $20,504 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 – by Provider and Service, 2024.
30-day fills
98 standardized 30-day fills in 2021
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
$1,188 in 2021
The total cost of these prescriptions in 2021, 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, 2021.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021–2025.
Years since graduation
9 years (graduated 2017)
CMS Doctors and Clinicians data list 2017 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
2017
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.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
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?”
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)
Cassandra Willison 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 Willison 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 Baltimore and Maryland
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 Baltimore, MD (2024, 467 clinicians with data). Median for this group: 133. Middle half: 56 to 326.
Close to the middle for clinicians listed under Physician Assistant in Maryland (2024, 1,553 clinicians with data). Median for this group: 283. Middle half: 85 to 795.
Medicare-allowed amount
A higher Medicare-allowed amount than 70% of clinicians listed under Physician Assistant in Baltimore, MD (2024, 467 clinicians with data). Median for this group: $13,577. Middle half: $5,411 to $27,872.
Close to the middle for clinicians listed under Physician Assistant in Maryland (2024, 1,553 clinicians with data). Median for this group: $23,589. Middle half: $8,301 to $55,477.
Paid by Medicare
A higher Medicare payment amount than 70% of clinicians listed under Physician Assistant in Baltimore, MD (2024, 467 clinicians with data). Median for this group: $10,221. Middle half: $4,190 to $21,011.
Close to the middle for clinicians listed under Physician Assistant in Maryland (2024, 1,553 clinicians with data). Median for this group: $17,886. Middle half: $6,225 to $41,454.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Cassandra Willison are from 2021.
1,194 active clinicians are listed under Physician Assistant with a practice address in Baltimore, MD (3,316 in Maryland).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Baltimore
8% of these 1,194 clinicians have the CMS telehealth indicator.
39.4% of these 1,194 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 782% from 28 in 2021 to 247 in 2024.
- 2021: 28
- 2022: 189
- 2023: 295
- 2024: 247
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Medicare-allowed amount
Medicare-allowed amount increased 858% from $2,878 in 2021 to $27,582 in 2024.
- 2021: $2,878
- 2022: $21,067
- 2023: $30,699
- 2024: $27,582
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Paid by Medicare
Paid by Medicare increased 776% from $2,339 in 2021 to $20,504 in 2024.
- 2021: $2,339
- 2022: $16,227
- 2023: $24,090
- 2024: $20,504
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 352% from 21 in 2018 to 95 in 2021.
- 2018: 21
- 2019: 37
- 2020: 93
- 2021: 95
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30-day fills
30-day fills increased 364% from 21 in 2018 to 98 in 2021.
- 2018: 21
- 2019: 38
- 2020: 99
- 2021: 98
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Part D drug cost
Part D drug cost went from $380 in 2018 to $1,188 in 2021.
- 2018: $380
- 2019: $727
- 2020: $1,002
- 2021: $1,188
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2021), 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 2020–2023 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, 2021–2024; 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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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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70 | 70 | $601.00 | $158.18 |
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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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70 | 70 | $422.60 | $125.41 |
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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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54 | 54 | $481.00 | $116.53 |
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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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53 | 41 | $109.94 | $27.13 |
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 2021.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Gabapentin | Gabapentin | 42 | 1,326 | $650.46 | 16 |
| Oxycodone Hcl | Oxycodone Hcl | 27 | 231 | $353.20 | 14 |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 14 | 182 | $130.73 | — |
| Tramadol Hcl | Tramadol Hcl | 12 | 152 | $53.15 | — |
Source: CMS Part D by Provider and Drug, 2021; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2021-06-13NUCC 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
I20180913001902
MD
2062788565
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
Johns Hopkins University
601 N Caroline St, Baltimore, MD 212870006
Phone: 4109555080
Johns Hopkins University
600 N Wolf St, Baltimore, MD 212870005
Phone: 4109555000
Johns Hopkins University
600 N Wolfe St, Baltimore, MD 212870005
Phone: 4105024340
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
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Recorded as CASSANDRA WILLISON, PA-C
Registered at 4940 EASTERN AVE, BALTIMORE, MD 21224 (Tel: 4105507900)
Registered at 9910 FRANKLIN SQUARE DR STE 2110, BALTIMORE, MD 212364902 (Tel: 4109336423)
Physician Assistant (license number reported to NPPES: MD C06526)
NPI status registered as active in NPPES database
Registered at 4940 EASTERN AVE, BALTIMORE, MD 212242735 (Tel: 4105507900)
Registered at 1 OAK CT, STATEN ISLAND, NY 103082161 (Tel: 7183603622)
Recorded as CASSANDRA BLAIR, PA-C
Physician Assistant
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Baltimore
- Elizabeth Tucker, PA-C
- Jonathan Cohen, PA-C
- Thomas Petry, PA
- Frank Delosso, PA
- Melissa Mcclain, PA
- Bridget Boyle
More public profiles in Maryland
Directory navigation, in NPI number order.
- Alex Baren, PA-C Physician Assistant · Baltimore
- Megan Willis, PT Physical Therapist · Frederick
- Yueun Lee, NP-C Nurse Practitioner - Family · Nottingham
- Vlad Damian, DDS Dentist · Frederick
- Logan Crawford, DPT Physical Therapist · Arnold
- Nicole Shinsky, PA-C Physician Assistant · Baltimore
- Benjamin Fujita-Howie, MD, MPH Anesthesiology - Pain Medicine · Baltimore
- Kristen Mathias Internal Medicine - Rheumatology · Baltimore
- Oluwakemi Balogun Nurse Practitioner - Psychiatric/Mental Health · Glen Burnie
- Mary Maldarelli, MD Internal Medicine - Critical Care Medicine · Baltimore
- Emmy Estrada, PA-C Physician Assistant - Medical · Glenn Dale
- Krystle Robinson, PT, DPT Physical Therapist - Orthopedic · Glenn Dale
Mailing Address
9910 Franklin Square Dr Ste 2110
Baltimore, MD 212364902
Phone: 4109336423