William Stephen Sutton-Ohannesian, DNP, PMHNP-BC
Psychiatric/Mental Health Nurse Practitioner · Falmouth, MA
William Stephen Sutton-Ohannesian, DNP, PMHNP-BC is a psychiatric/mental health nurse practitioner with a practice address in Falmouth, Massachusetts, and NPI 1013261965, issued on Oct 30, 2012. Check the license (Massachusetts RN2278863, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Stephen Sutton-Ohannesian
- Credential
- DNP, PMHNP-BC
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- RN2278863 MA
R222558 MD
Self-reported in NPPES; status is on the state search - Practice location
- 100 Ter Heun Dr, Falmouth, MA 02540
- Phone
- (508) 548-5300
- Enumerated
- Oct 30, 2012
- Record last updated
- May 26, 2023
- Medicare enrollment
- Enrolled (PECOS I20230628002949); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 2,169 in Massachusetts → Look up another NPI →
Also registered at 100 Ter Heun Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Stephen Sutton-Ohannesian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN2278863Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
169 Medicare Part D claims for 37 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D.
Most prescribed
- Alprazolam18 claims
- Olanzapine16 claims
- Escitalopram Oxalate11 claims
- Fluoxetine Hcl11 claims
- Trazodone Hcl11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 97 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Child And Family Psychological Services PLLCPlymouth, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Stephen Sutton-Ohannesian among 2,169 psychiatric/mental health nurse practitioner records in Massachusetts
William Stephen Sutton-Ohannesian, DNP, PMHNP-BC is one of 2,169 psychiatric/mental health nurse practitioner records with a practice address in Massachusetts. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 16% of them.
- NPI issued2012 · 16% of these records are older, 81% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2018 · median 2021 among the 1,309 with a school on file
- Record last updated2023 · 23% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatric/Mental Health Nurse Practitioner providers in Massachusetts
There are 2,169 psychiatric/mental health nurse practitioner records in Massachusetts.
All 2,169 in Massachusetts → Every provider in Falmouth → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Karyn Ellis, DNP, RNFalmouth, MA 025401225178346
- Daniel O'BrienFalmouth, MA 025401831687144
- David Jaffe, N.P.Waquoit, MA 025361902186158
- Kathleen Byrne, NPBuzzards Bay, MA 025321306155759
- Jessica Carlin, RN, CPNP, PMHNPBuzzards Bay, MA 025321316071533
- Joleen Connolly, PMHNP-BCBuzzards Bay, MA 025321538868559
- Kathleen Heffernan, APNBourne, MA 025321548870710
- Kathleen Hood, NURSE PRACTITIONERBuzzards Bay, MA 025321619688819
Common questions
What is William Stephen Sutton-Ohannesian, DNP, PMHNP-BC's NPI number?
William Stephen Sutton-Ohannesian, DNP, PMHNP-BC's National Provider Identifier (NPI) is 1013261965, issued on Oct 30, 2012. An NPI identifies a provider in billing; it is not a license.
Where is William Stephen Sutton-Ohannesian, DNP, PMHNP-BC located?
The NPPES record lists a practice address at 100 Ter Heun Dr, Falmouth, MA, 02540. Phone: (508) 548-5300. Providers update this record themselves, so call before visiting.
How can I verify William Stephen Sutton-Ohannesian, DNP, PMHNP-BC's license?
NPPES lists Massachusetts license number RN2278863, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does William Stephen Sutton-Ohannesian, DNP, PMHNP-BC prescribe under Medicare Part D?
In 2024, William Stephen Sutton-Ohannesian, DNP, PMHNP-BC had 169 Medicare Part D claims for 37 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. Part D covers Medicare prescriptions only.
What is William Stephen Sutton-Ohannesian, DNP, PMHNP-BC's MIPS final score?
The 2023 MIPS final score is 97 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.