Sydney Diann Seyfert, NP
Psychiatric/Mental Health Nurse Practitioner · Missoula, MT
Sydney Diann Seyfert, NP is a psychiatric/mental health nurse practitioner with a practice address in Missoula, Montana, and NPI 1821394974, issued on Feb 8, 2011. Check the license (Montana NUR-RN-LIC-46667, as entered in NPPES) with the Montana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sydney Diann Seyfert
- Credential
- NP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- NUR-RN-LIC-46667 MT
AP60202570 WA
Self-reported in NPPES; status is on the state search - Practice location
- 821 S Orange St, Missoula, MT 59801
- Phone
- (406) 540-3556
- Enumerated
- Feb 8, 2011
- Record last updated
- Apr 22, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (406) 926-1049
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 243 in Montana → Look up another NPI →
Also registered at 821 S Orange St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Leslie Burgess, L.C.P.C.Professional Counselor1033274402
Verify Sydney Diann Seyfert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this profession
Search for license NUR-RN-LIC-46667Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
327 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 11% of claims.
Most prescribed
- Escitalopram Oxalate27 claims
- Lamotrigine27 claims
- Gabapentin25 claims
- Haloperidol Decanoate25 claims
- Zolpidem Tartrate17 claims
- Olanzapine14 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: $32.45
2 payments; by number, the most common kind was food and beverage; the largest payer was Lundbeck LLC. 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.
Sydney Diann Seyfert among 243 psychiatric/mental health nurse practitioner records in Montana
Sydney Diann Seyfert, NP is one of 243 psychiatric/mental health nurse practitioner records with a practice address in Montana. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 14% of them.
- NPI issued2011 · 14% of these records are older, 82% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2020 · 28% 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 Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
36 psychiatric/mental health nurse practitioner records list a practice address in Missoula
They are 36 of the 3,567 NPPES records with a practice address in Missoula, and 243 psychiatric/mental health nurse practitioner records in Montana.
All 243 in Montana → Every provider in Missoula → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Darcy Chenoweth, RN, APRN, DNP, PMHNPMissoula, MT 598011053105585
- Erin Corbett, LCSW, LAC, APRNMissoula, MT 598011679907000
- Sheree Haugen, PMHNP-BCMissoula, MT 598011417811365
- Sherry Martin, DNP, APRNMissoula, MT 598011497857932
- Carol Reed, PMHNP-BCMissoula, MT 598011407784713
- Paula Braun, APRNMissoula, MT 598021639140726
- Katrina Brucker, NPMissoula, MT 598021427489822
- Dessye-Dee Clark, ARNP, PHDMissoula, MT 598021801802855
Common questions
What is Sydney Diann Seyfert, NP's NPI number?
Sydney Diann Seyfert, NP's National Provider Identifier (NPI) is 1821394974, issued on Feb 8, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Sydney Diann Seyfert, NP located?
The NPPES record lists a practice address at 821 S Orange St, Missoula, MT, 59801. Phone: (406) 540-3556. Providers update this record themselves, so call before visiting.
How can I verify Sydney Diann Seyfert, NP's license?
NPPES lists Montana license number NUR-RN-LIC-46667, as entered by the provider. Search the Montana board that licenses this profession; the NPPES record confirms identity only.
How much does Sydney Diann Seyfert, NP prescribe under Medicare Part D?
In 2024, Sydney Diann Seyfert, NP had 327 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.