Cynthia Dumler, M.D.
NPI 1851342489 · Family Medicine Physician · Lake Oswego, OR
Cynthia Dumler, M.D. is a Family Medicine Physician provider in Lake Oswego, OR (NPI 1851342489).
Provider details
- NPI number
- 1851342489
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- MD23827 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Quetiapine Fumarate | 41 |
| Mirtazapine | 28 |
| Memantine Hcl | 25 |
| Timolol Maleate | 16 |
| Levothyroxine Sodium | 15 |
| Amlodipine Besylate | 13 |
| Cephalexin | 12 |
| Donepezil Hcl | 12 |
| Olmesartan Medoxomil | 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 , 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
- 2006-05-16
- Last updated
- 2011-02-23
Frequently asked questions
- What is Cynthia Dumler's NPI number?
- Cynthia Dumler's National Provider Identifier (NPI) is 1851342489, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cynthia Dumler's specialty?
- Cynthia Dumler is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Cynthia Dumler located?
- Cynthia Dumler's practice location on file with NPPES is 4309 Oakridge Rd, Lake Oswego, OR 97035-3418.
- What is Cynthia Dumler's phone number?
- The practice phone number listed in the NPPES registry for Cynthia Dumler is (503) 636-9687.
- Is Cynthia Dumler's NPI active?
- Yes — Cynthia Dumler's NPI (1851342489) is active in the NPPES registry as of the last update on 2011-02-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.