NPPES file of Aug 9, 2026

Mary Katherine Marcellus, CNP

Family Nurse Practitioner · Mashpee, MA

Mary Katherine Marcellus, CNP is a family nurse practitioner with a practice address in Mashpee, Massachusetts, and NPI 1700662004, issued on Sep 4, 2023. Check the license (Massachusetts RN2329432, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1700662004
Name
Mary Katherine Marcellus
Credential
CNP
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
RN2329432 MA
Self-reported in NPPES; status is on the state search
Practice location
195 Falmouth RD Apt 8A, Mashpee, MA 02649
Phone
(802) 384-2061
Enumerated
Sep 4, 2023
Record last updated
Sep 4, 2023
Medicare enrollment
Enrolled (PECOS I20260226000327); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest family nurse practitioner records → All 4,724 in Massachusetts → Look up another NPI →

Verify Mary Katherine Marcellus in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
    Search for license RN2329432    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Bills Medicare through one group practice

  1. Vantage Healthcare LLCWellesley, MA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Mary Katherine Marcellus among 4,724 family nurse practitioner records in Massachusetts

Mary Katherine Marcellus, CNP is one of 4,724 family nurse practitioner records with a practice address in Massachusetts. 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 2023, is newer than 79% of them.

  • NPI issued2023 · 79% of these records are older, 14% newer
  • In a Medicare fileYes · 71% of these records are
  • In the CMS Doctors and Clinicians fileYes · 57% of these records are
  • Graduated2022 · median 2019 among the 2,704 with a school on file
  • Record last updated2023 · 42% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

17 family nurse practitioner records list a practice address in Mashpee

They are 17 of the 356 NPPES records with a practice address in Mashpee, and 4,724 family nurse practitioner records in Massachusetts.

All 4,724 in Massachusetts → Every provider in Mashpee → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Kyle Chaplic, NP-CMashpee, MA 026491730444936
  2. Emily Elgert, FNP-BCMashpee, MA 026491336791680
  3. Pedro Fortes, MSN, FNP-CMashpee, MA 026491356124218
  4. Karen Gauvin, RNMashpee, MA 026491619492923
  5. Kate Grundy, CNPMashpee, MA 026491558067686
  6. Jennifer Keim, FNP-CMashpee, MA 026491679228704
  7. Olivia Lieberman, FNPMashpee, MA 026491013884824
  8. Jillian Martin, FNP, PMHNPMashpee, MA 026491063039261

Common questions

What is Mary Katherine Marcellus, CNP's NPI number?

Mary Katherine Marcellus, CNP's National Provider Identifier (NPI) is 1700662004, issued on Sep 4, 2023. An NPI identifies a provider in billing; it is not a license.

Where is Mary Katherine Marcellus, CNP located?

The NPPES record lists a practice address at 195 Falmouth RD Apt 8A, Mashpee, MA, 02649. Phone: (802) 384-2061. Providers update this record themselves, so call before visiting.

How can I verify Mary Katherine Marcellus, CNP's license?

NPPES lists Massachusetts license number RN2329432, as entered by the provider. Search the Massachusetts 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.