Treesa Williamson, CRNP
Psychiatric/Mental Health Nurse Practitioner · Philadelphia, PA
Treesa Williamson, CRNP is a psychiatric/mental health nurse practitioner with a practice address in Philadelphia, Pennsylvania, and NPI 1598159824, issued on Mar 25, 2015. Check the license (Pennsylvania SP026787, as entered in NPPES) with the Pennsylvania board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Treesa Williamson
- Credential
- CRNP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- SP026787 PA
SP014874 PA
12.013004 CT
TPAN633 FL
Self-reported in NPPES; status is on the state search - Practice location
- 161 Cecil B Moore Ave Apt 204, Philadelphia, PA 19122
- Phone
- (215) 585-2144
- Enumerated
- Mar 25, 2015
- Record last updated
- Dec 9, 2025
- Medicaid ID
- 1031853220001 PA
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 1,628 in Pennsylvania → Look up another NPI →
Also registered at 161 Cecil B Moore Ave Apt 204
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ellen Linde, CRNPNurse Practitioner1174754774
- Alexandra McClellan, NPPsychiatric/Mental Health Nurse Practitioner1962107128
- Madison Mulhern, DNPNurse Practitioner1801768437
Verify Treesa Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
Search for license SP026787Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
74 Medicare Part D claims for 26 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Treesa Williamson among 1,628 psychiatric/mental health nurse practitioner records in Pennsylvania
Treesa Williamson, CRNP is one of 1,628 psychiatric/mental health nurse practitioner records with a practice address in Pennsylvania. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 19% of them.
- NPI issued2015 · 19% of these records are older, 79% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileNo · 55% of these records are
- Record last updated2025 · 22% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatric/Mental Health Nurse Practitioner providers in Pennsylvania
There are 1,628 psychiatric/mental health nurse practitioner records in Pennsylvania.
All 1,628 in Pennsylvania → Every provider in Philadelphia → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Aaron Daciuk, CRNP-PMHNPPhiladelphia, PA 191221861244311
- Amanda DorsinvillePhiladelphia, PA 191221043149339
- Renee Lucci, CRNPPhiladelphia, PA 191221699385146
- Alexandra McClellan, NPPhiladelphia, PA 191221962107128
- Jessica Vazquez, DNP, FNP-BC, PMHNPPhiladelphia, PA 191221801442470
- Emily Chelso, APRNPhiladelphia, PA 191211689390866
- Arwen Deschere, CRNPPhiladelphia, PA 191231265294540
- Elizabeth Frasch, CRNPPhiladelphia, PA 191211073275129
Common questions
What is Treesa Williamson, CRNP's NPI number?
Treesa Williamson, CRNP's National Provider Identifier (NPI) is 1598159824, issued on Mar 25, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Treesa Williamson, CRNP located?
The NPPES record lists a practice address at 161 Cecil B Moore Ave Apt 204, Philadelphia, PA, 19122. Phone: (215) 585-2144. Providers update this record themselves, so call before visiting.
How can I verify Treesa Williamson, CRNP's license?
NPPES lists Pennsylvania license number SP026787, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.
How much does Treesa Williamson, CRNP prescribe under Medicare Part D?
In 2024, Treesa Williamson, CRNP had 74 Medicare Part D claims for 26 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. Part D covers Medicare prescriptions only.
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.