Martha Marie Seymour, NPP
Psychiatric/Mental Health Nurse Practitioner · Riverhead, NY
Martha Marie Seymour, NPP is a psychiatric/mental health nurse practitioner with a practice address in Riverhead, New York, and NPI 1578646055, issued on Oct 20, 2006. Check the license (New York F400622-1, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Martha Marie Seymour
- Credential
- NPP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License number
- F400622-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 300 Center Drive 2ND Floor Wing, Riverhead, NY 11901
- Phone
- (631) 185-2144
- Enumerated
- Oct 20, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (631) 852-1448
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 4,129 in New York → Look up another NPI →
Verify Martha Marie Seymour in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license F400622-1Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
11 Medicare Part D claims, 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.
Industry payments in 2024: $125.00
1 payment: food and beverage; the largest payer was Abbvie Inc. The 23,362 providers of this specialty with any payment received $1,027.77 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.
Martha Marie Seymour among 4,129 psychiatric/mental health nurse practitioner records in New York
Martha Marie Seymour, NPP is one of 4,129 psychiatric/mental health nurse practitioner records with a practice address in New York. 68% 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 under 1% of them.
- NPI issued2006 · under 1% of these records are older, 92% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileNo · 46% of these records are
- Record last updated2007 · 34% 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 New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 psychiatric/mental health nurse practitioner records list a practice address in Riverhead
They are 10 of the 982 NPPES records with a practice address in Riverhead, and 4,129 psychiatric/mental health nurse practitioner records in New York.
All 4,129 in New York → Every provider in Riverhead → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Nicole Byrne, RN, PMHNPRiverhead, NY 119011457921090
- Jane Frith, JANE FRITH,NPPRiverhead, NY 119011528139656
- Mary Kerch, NPP-BCRiverhead, NY 119011487053583
- Wendy McLaughlin, NPPRiverhead, NY 119011669512133
- Lynn Mitchell, NPRiverhead, NY 119011457337404
- Peter Smith, NPRiverhead, NY 119011710360102
- Robert Southard, NPRiverhead, NY 119011972695377
- Sean Thomas, NPRiverhead, NY 119011750635132
Common questions
What is Martha Marie Seymour, NPP's NPI number?
Martha Marie Seymour, NPP's National Provider Identifier (NPI) is 1578646055, issued on Oct 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Martha Marie Seymour, NPP located?
The NPPES record lists a practice address at 300 Center Drive 2ND Floor Wing, Riverhead, NY, 11901. Phone: (631) 185-2144. Providers update this record themselves, so call before visiting.
How can I verify Martha Marie Seymour, NPP's license?
NPPES lists New York license number F400622-1, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does Martha Marie Seymour, NPP prescribe under Medicare Part D?
In 2024, Martha Marie Seymour, NPP had 11 Medicare Part D claims; 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.