Ellen Singer, M.D.
NPI 1689687279 · Internal Medicine Physician · Portland, OR
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ellen Singer, M.D. is a Internal Medicine Physician provider in Portland, OR (NPI 1689687279).
Provider details
- NPI number
- 1689687279
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- MD19574 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
3 documented practice locations
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 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Nirmatrelvir/Ritonavirbrand: Paxlovid | 39 | 39 |
| Cephalexin | 28 | 27 |
| Doxycycline Monohydrate | 20 | 20 |
| Rosuvastatin Calcium | 15 | — |
| Estradiol | 13 | — |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 13 | 13 |
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 , 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
Additional practice locations (2)
- 10350 E Dakota AveDenver, CO 80247-1314Phone: (303) 338-4545
- 535 Ne 6th AveEstacada, OR 97023-9312Phone: (503) 630-8550
Registry dates
- Enumerated
- 2006-08-14
- Last updated
- 2026-01-21
- Certified
- 2026-01-21
Frequently asked questions
- What is Ellen Singer's NPI number?
- Ellen Singer's National Provider Identifier (NPI) is 1689687279, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ellen Singer's specialty?
- Ellen Singer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ellen Singer located?
- Ellen Singer's practice location on file with NPPES is 3500 N Interstate Ave, Portland, OR 97227-1196.
- What is Ellen Singer's phone number?
- The practice phone number listed in the NPPES registry for Ellen Singer is (503) 331-6116.
- Does Ellen Singer accept Medicare?
- Ellen Singer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ellen Singer's NPI active?
- Yes — Ellen Singer's NPI (1689687279) is active in the NPPES registry as of the last update on 2026-01-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.