Cassandra Marie Muxen, MD
Internal Medicine Physician · North Haven, CT
Cassandra Marie Muxen, MD is an internal medicine physician with a practice address in North Haven, Connecticut, and NPI 1346744513, issued on Mar 21, 2018. Check the license (Connecticut 071967, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Cassandra Marie Muxen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 071967 CT
325226 LA
Self-reported in NPPES; status is on the state search - Practice location
- 190 Universal Drive, North Haven, CT 06473
- Phone
- (203) 694-7550
- Enumerated
- Mar 21, 2018
- Record last updated
- Aug 19, 2022
- Medicare enrollment
- Enrolled (PECOS I20220831002106); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 190 Universal Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Cassandra Marie Muxen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 071967Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average internal medicine physician in 2024
6,506 Medicare Part D claims for 844 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 58 claims were for opioids.
Most prescribed
- Atorvastatin Calcium371 claims
- Amlodipine Besylate324 claims
- Rosuvastatin Calcium321 claims
- Levothyroxine Sodium295 claims
- Lisinopril189 claims
- Losartan Potassium168 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.
Bills Medicare through 2 group practices
- Hartford Healthcare Medical Group IncNorth Haven, CT
- Hartford Healthcare Medical Group Specialists PLLCBridgeport, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cassandra Marie Muxen among 2,623 internal medicine physician records in Connecticut
Cassandra Marie Muxen, MD is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 82% of them.
- NPI issued2018 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2018 · median 2004 among the 1,646 with a school on file
- Record last updated2022 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 internal medicine physician records list a practice address in North Haven
They are 14 of the 539 NPPES records with a practice address in North Haven, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in North Haven → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Dianne Defusco, MDNorth Haven, CT 064731063584787
- Jennifer Dilungo, PA-CNorth Haven, CT 064731972649812
- John Fomeche, MDNorth Haven, CT 064731336886431
- Lorenzo Galante, MDNorth Haven, CT 064731023180726
- Jeffrey Gimbel, M.D.North Haven, CT 064731861436735
- Gidon Goldenberg, M.D.North Haven, CT 064731689619041
- Georgia Kelley, M.D.North Haven, CT 064731013945211
- Maida KhanNorth Haven, CT 064731972165751
Common questions
What is Cassandra Marie Muxen, MD's NPI number?
Cassandra Marie Muxen, MD's National Provider Identifier (NPI) is 1346744513, issued on Mar 21, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Cassandra Marie Muxen, MD located?
The NPPES record lists a practice address at 190 Universal Drive, North Haven, CT, 06473. Phone: (203) 694-7550. Providers update this record themselves, so call before visiting.
How can I verify Cassandra Marie Muxen, MD's license?
NPPES lists Connecticut license number 071967, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cassandra Marie Muxen, MD prescribe under Medicare Part D?
In 2024, Cassandra Marie Muxen, MD had 6,506 Medicare Part D claims for 844 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.