Melissa Nyendak, MD
NPI 1851506299 · Infectious Disease Physician · Portland, OR
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Melissa Nyendak, MD is a Infectious Disease Physician provider in Portland, OR (NPI 1851506299).
Provider details
- NPI number
- 1851506299
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- MD25919 (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
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
- 2007-05-11
- Last updated
- 2007-08-07
Frequently asked questions
- What is Melissa Nyendak's NPI number?
- Melissa Nyendak's National Provider Identifier (NPI) is 1851506299, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Melissa Nyendak's specialty?
- Melissa Nyendak is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Melissa Nyendak located?
- Melissa Nyendak's practice location on file with NPPES is Oregon Health and Science University, Portland, OR 97239.
- What is Melissa Nyendak's phone number?
- The practice phone number listed in the NPPES registry for Melissa Nyendak is (503) 494-9000.
- Does Melissa Nyendak accept Medicare?
- Melissa Nyendak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Melissa Nyendak's NPI active?
- Yes — Melissa Nyendak's NPI (1851506299) is active in the NPPES registry as of the last update on 2007-08-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.