Mark Steven Larsen
Certified Registered Nurse Anesthetist · Norwich, CT
Mark Steven Larsen is a certified registered nurse anesthetist with a practice address in Norwich, Connecticut, and NPI 1447223078, issued on Feb 13, 2006. Check the license (Connecticut 001769, as entered in NPPES) with the Connecticut board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Steven Larsen
- Primary taxonomy
- Certified Registered Nurse Anesthetist 367500000X
- License number
- 001769 CT
Self-reported in NPPES; status is on the state search - Practice location
- 326 Washington St, Norwich, CT 06360
- Phone
- (860) 823-6337
- Enumerated
- Feb 13, 2006
- Record last updated
- Aug 2, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20051220000099); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest certified registered nurse anesthetist records → All 880 in Connecticut → Look up another NPI →
Also registered at 326 Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Steven Larsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license 001769Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Integrated Anesthesia Associates LLCNorwich, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Steven Larsen among 880 certified registered nurse anesthetist records in Connecticut
Mark Steven Larsen is one of 880 certified registered nurse anesthetist records with a practice address in Connecticut. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 66% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1990 · median 2014 among the 653 with a school on file
- Record last updated2012 · 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 367500000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
27 certified registered nurse anesthetist records list a practice address in Norwich
They are 27 of the 1,431 NPPES records with a practice address in Norwich, and 880 certified registered nurse anesthetist records in Connecticut.
All 880 in Connecticut → Every provider in Norwich → Certified Registered Nurse Anesthetist nationwide →
The 8 certified registered nurse anesthetist records with the nearest ZIP codes
- Meredith Barnes, CRNA, APRNNorwich, CT 063601861778953
- Gail Bettencourt, CRNANorwich, CT 063601992909238
- Monica Brewster, APRN, CRNANorwich, CT 063601922135250
- Lois Caldrello, CRNANorwich, CT 063601275885436
- Wendy Carrington, CRNANorwich, CT 063601881662138
- Mary Ellen Comolli, APRN, CRNANorwich, CT 063601275678518
- Bertha Doss, CRNANorwich, CT 063601386701795
- Sandra Jeppesen, APRN, CRNANorwich, CT 063601265600704
Common questions
What is Mark Steven Larsen's NPI number?
Mark Steven Larsen's National Provider Identifier (NPI) is 1447223078, issued on Feb 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Steven Larsen located?
The NPPES record lists a practice address at 326 Washington St, Norwich, CT, 06360. Phone: (860) 823-6337. Providers update this record themselves, so call before visiting.
How can I verify Mark Steven Larsen's license?
NPPES lists Connecticut license number 001769, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity 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.