Cassandra Y. Gryczewski, ACAGNP
Adult Health Nurse Practitioner · Wethersfield, CT
Cassandra Y. Gryczewski, ACAGNP is an adult health nurse practitioner with a practice address in Wethersfield, Connecticut, and NPI 1851796551, issued on Oct 24, 2014. Check the license (Connecticut 005962, as entered in NPPES) with the Connecticut board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cassandra Y. Gryczewski
- Credential
- ACAGNP
- Primary taxonomy
- Adult Health Nurse Practitioner 363LA2200X
- License number
- 005962 CT
Self-reported in NPPES; status is on the state search - Practice location
- 1260 Silas Deane Hwy, Wethersfield, CT 06109
- Phone
- (860) 258-2375
- Enumerated
- Oct 24, 2014
- Record last updated
- May 21, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (860) 571-6805
- Medicare enrollment
- Enrolled (PECOS I20150331001887); accepts Medicare assignment
- Medical or professional school
- University Of Connecticut School Of Medicine, 2014
- Entity
- Type 1 · individual
8 nearest adult health nurse practitioner records → All 628 in Connecticut → Look up another NPI →
Also registered at 1260 Silas Deane Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Cassandra Y. Gryczewski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license 005962Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average adult health nurse practitioner in 2024
84 Medicare Part D claims for 36 beneficiaries, against an average of 1,280 among the 16,937 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone11 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.
Industry payments in 2024: $122.24
2 payments; by number, the most common kind was food and beverage; the largest payer was Myriad Genetic Laboratories, Inc. The 12,291 providers of this specialty with any payment received $946.40 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Starling Physicians, PLLCAvon, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cassandra Y. Gryczewski among 628 adult health nurse practitioner records in Connecticut
Cassandra Y. Gryczewski, ACAGNP is one of 628 adult health nurse practitioner records with a practice address in Connecticut. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 60% of them.
- NPI issued2014 · 60% of these records are older, 36% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2014 · median 2013 among the 332 with a school on file
- Record last updated2018 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2200X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 adult health nurse practitioner records list a practice address in Wethersfield
They are 9 of the 450 NPPES records with a practice address in Wethersfield, and 628 adult health nurse practitioner records in Connecticut.
All 628 in Connecticut → Every provider in Wethersfield → Adult Health Nurse Practitioner nationwide →
The 8 adult health nurse practitioner records with the nearest ZIP codes
- Amber Berry, ANP-BC, MSNWethersfield, CT 061091821426487
- Alicia Bravo, ANP-BCWethersfield, CT 061091164869137
- Christine Daniels, MS, APRN, AGNP-CWethersfield, CT 061091457157877
- Kelley Gilroy, APRNWethersfield, CT 061091417735333
- Laura Mulka, APRNWethersfield, CT 061091861493611
- Martha O'Brien, APRNWethersfield, CT 061091770566689
- Katherine Thomsen, APRNWethersfield, CT 061091659344174
- Lynne Whitney, APRNWethersfield, CT 061091033139613
Common questions
What is Cassandra Y. Gryczewski, ACAGNP's NPI number?
Cassandra Y. Gryczewski, ACAGNP's National Provider Identifier (NPI) is 1851796551, issued on Oct 24, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Cassandra Y. Gryczewski, ACAGNP located?
The NPPES record lists a practice address at 1260 Silas Deane Hwy, Wethersfield, CT, 06109. Phone: (860) 258-2375. Providers update this record themselves, so call before visiting.
How can I verify Cassandra Y. Gryczewski, ACAGNP's license?
NPPES lists Connecticut license number 005962, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity only.
How much does Cassandra Y. Gryczewski, ACAGNP prescribe under Medicare Part D?
In 2024, Cassandra Y. Gryczewski, ACAGNP had 84 Medicare Part D claims for 36 beneficiaries; the average among adult health nurse practitioner prescribers was 1,280. 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.