Cassandra Blair Willison, PA-C
Physician Assistant · Baltimore, MD
Cassandra Blair Willison, PA-C is a physician assistant with a practice address in Baltimore, Maryland, and NPI 1083135735, issued on Jul 3, 2017. Check the license (Maryland C06526, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cassandra Blair Willison
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- C06526 MD
Self-reported in NPPES; status is on the state search - Practice location
- 4940 Eastern Ave, Baltimore, MD 21224
- Phone
- (410) 550-7900
- Enumerated
- Jul 3, 2017
- Record last updated
- Jun 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180913001902); may accept Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 3,224 in Maryland → Look up another NPI →
Also registered at 4940 Eastern Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Cassandra Blair Willison in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license C06526Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 74.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Johns Hopkins UniversityBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cassandra Blair Willison among 3,224 physician assistant records in Maryland
Cassandra Blair Willison, PA-C is one of 3,224 physician assistant records with a practice address in Maryland. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 52% of them.
- NPI issued2017 · 52% of these records are older, 43% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2017 · median 2017 among the 1,974 with a school on file
- Record last updated2021 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,135 physician assistant records list a practice address in Baltimore
They are 1,135 of the 35,183 NPPES records with a practice address in Baltimore, and 3,224 physician assistant records in Maryland.
All 3,224 in Maryland → Every provider in Baltimore → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Carolyn Bacal, P.A.-C.Baltimore, MD 212241568427342
- Lisa Barkey, P.A.-C.Baltimore, MD 212241487619052
- Janine Coy, P.A.Baltimore, MD 212241629054812
- Erin Fitzpatrick, P.A.-C.Baltimore, MD 212241154372225
- Robert Gomon, P.A.-C.Baltimore, MD 212241992758502
- Sherwood Holloway, P.A.-C.Baltimore, MD 212241871546614
- Colleen Howland, PA-CBaltimore, MD 212241346205051
- Andra Love, P.A.-CBaltimore, MD 212241235186776
Common questions
What is Cassandra Blair Willison, PA-C's NPI number?
Cassandra Blair Willison, PA-C's National Provider Identifier (NPI) is 1083135735, issued on Jul 3, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Cassandra Blair Willison, PA-C located?
The NPPES record lists a practice address at 4940 Eastern Ave, Baltimore, MD, 21224. Phone: (410) 550-7900. Providers update this record themselves, so call before visiting.
How can I verify Cassandra Blair Willison, PA-C's license?
NPPES lists Maryland license number C06526, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
What is Cassandra Blair Willison, PA-C's MIPS final score?
The 2023 MIPS final score is 74.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.