Karen Triandafyllis, NP
NPI 1659599983 · Psychiatric/Mental Health Nurse Practitioner · San Francisco, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Triandafyllis, NP is a Psychiatric/Mental Health Nurse Practitioner provider in San Francisco, CA (NPI 1659599983).
Provider details
- NPI number
- 1659599983
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- NP 18093 (CA)
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 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Bupropion Hclbrand: Bupropion Xl | 31 |
| Aripiprazole | 29 |
| Prazosin Hcl | 25 |
| Mirtazapine | 19 |
| Risperidone | 18 |
| Atomoxetine Hcl | 13 |
| Clonazepam | 13 |
| Buspirone Hcl | 11 |
| Diazepam | 11 |
| Sertraline Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-23
- Last updated
- 2025-10-09
- Certified
- 2025-10-09
Frequently asked questions
- What is Karen Triandafyllis's NPI number?
- Karen Triandafyllis's National Provider Identifier (NPI) is 1659599983, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Triandafyllis's specialty?
- Karen Triandafyllis is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Triandafyllis located?
- Karen Triandafyllis's practice location on file with NPPES is 995 Potrero Ave, Ward 93, San Francisco, CA 94110.
- What is Karen Triandafyllis's phone number?
- The practice phone number listed in the NPPES registry for Karen Triandafyllis is (628) 206-6522.
- Does Karen Triandafyllis accept Medicare?
- Karen Triandafyllis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Triandafyllis's NPI active?
- Yes — Karen Triandafyllis's NPI (1659599983) is active in the NPPES registry as of the last update on 2025-10-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.