William Sutton-Ohannesian, DNP, PMHNP-BC
NPI 1013261965 · Psychiatric/Mental Health Nurse Practitioner · Falmouth, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Sutton-Ohannesian, DNP, PMHNP-BC is a Psychiatric/Mental Health Nurse Practitioner provider in Falmouth, MA (NPI 1013261965).
Provider details
- NPI number
- 1013261965
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- DNP, PMHNP-BC
- Sex
- Male
- Sole proprietor
- No
- License
- R222558 (MD)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
384 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 110 | $100 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 76 | $59 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 70 | $66 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 66 | $107 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 42 | $109 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Alprazolam | 18 |
| Olanzapine | 16 |
| Escitalopram Oxalate | 11 |
| Fluoxetine Hcl | 11 |
| Trazodone Hcl | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-10-30
- Last updated
- 2023-05-26
- Certified
- 2023-05-26
Frequently asked questions
- What is William Sutton-Ohannesian's NPI number?
- William Sutton-Ohannesian's National Provider Identifier (NPI) is 1013261965, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Sutton-Ohannesian's specialty?
- William Sutton-Ohannesian is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Sutton-Ohannesian located?
- William Sutton-Ohannesian's practice location on file with NPPES is 100 Ter Heun Dr, Falmouth, MA 02540-2599.
- What is William Sutton-Ohannesian's phone number?
- The practice phone number listed in the NPPES registry for William Sutton-Ohannesian is (508) 548-5300.
- Does William Sutton-Ohannesian accept Medicare?
- William Sutton-Ohannesian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Sutton-Ohannesian's NPI active?
- Yes — William Sutton-Ohannesian's NPI (1013261965) is active in the NPPES registry as of the last update on 2023-05-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.