Ellen Portnoy, CNP
NPI 1215056031 · Psychiatric/Mental Health Nurse Practitioner · Troy, MI
Ellen Portnoy, CNP is a Psychiatric/Mental Health Nurse Practitioner provider in Troy, MI (NPI 1215056031).
Provider details
- NPI number
- 1215056031
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CNP
- Sex
- Female
- Sole proprietor
- No
- License
- 6801064524 (MI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-29
- Last updated
- 2021-04-08
- Certified
- 2021-03-18
Frequently asked questions
- What is Ellen Portnoy's NPI number?
- Ellen Portnoy's National Provider Identifier (NPI) is 1215056031, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ellen Portnoy's specialty?
- Ellen Portnoy is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Ellen Portnoy located?
- Ellen Portnoy's practice location on file with NPPES is 2825 Livernois Rd, Troy, MI 48083-1214.
- What is Ellen Portnoy's phone number?
- The practice phone number listed in the NPPES registry for Ellen Portnoy is (248) 680-2060.
- Is Ellen Portnoy's NPI active?
- Yes — Ellen Portnoy's NPI (1215056031) is active in the NPPES registry as of the last update on 2021-04-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.