Chelsea Tieszen, MD, MS
NPI 1518200377 · Geriatric Medicine (Internal Medicine) Physician · Portland, OR
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chelsea Tieszen, MD, MS is a Geriatric Medicine (Internal Medicine) Physician provider in Portland, OR (NPI 1518200377).
Provider details
- NPI number
- 1518200377
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MS
- Sex
- Female
- Sole proprietor
- No
- License
- MD182564 (OR)
Specialties & taxonomies
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
13 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 · 167 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 500 | 56 |
| Memantine Hcl | 373 | 42 |
| Oxycodone Hcl | 303 | 58 |
| Apixabanbrand: Eliquis | 286 | 33 |
| Levothyroxine Sodium | 281 | 29 |
| Omeprazole | 255 | 36 |
| Donepezil Hcl | 229 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-03-30
- Last updated
- 2024-10-25
- Certified
- 2024-10-25
Frequently asked questions
- What is Chelsea Tieszen's NPI number?
- Chelsea Tieszen's National Provider Identifier (NPI) is 1518200377, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chelsea Tieszen's specialty?
- Chelsea Tieszen is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Chelsea Tieszen located?
- Chelsea Tieszen's practice location on file with NPPES is 17727 E Burnside St, Portland, OR 97233-4803.
- What is Chelsea Tieszen's phone number?
- The practice phone number listed in the NPPES registry for Chelsea Tieszen is (503) 215-9800.
- Does Chelsea Tieszen accept Medicare?
- Chelsea Tieszen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chelsea Tieszen's NPI active?
- Yes — Chelsea Tieszen's NPI (1518200377) is active in the NPPES registry as of the last update on 2024-10-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.