Diana Negreanu, MD
NPI 1538282447 · Specialist · Portland, OR
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Negreanu, MD is a Specialist provider in Portland, OR (NPI 1538282447).
Provider details
- NPI number
- 1538282447
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- LL16507 (OR)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
151 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 80 | $131 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 53 | $93 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 18 | $224 |
Typical Medicare-allowed amounts for these services range $93–$224 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 226 | 69 |
| Levothyroxine Sodiumbrand: Synthroid | 128 | 32 |
| Methimazole | 69 | 20 |
| Hydrocortisone | 52 | 11 |
| Hydrochlorothiazide | 49 | 13 |
| Empagliflozinbrand: Jardiance | 47 | 13 |
| Alendronate Sodium | 46 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-06
- Last updated
- 2022-05-12
- Certified
- 2022-05-12
Frequently asked questions
- What is Diana Negreanu's NPI number?
- Diana Negreanu's National Provider Identifier (NPI) is 1538282447, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Negreanu's specialty?
- Diana Negreanu is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Diana Negreanu located?
- Diana Negreanu's practice location on file with NPPES is 5050 Ne Hoyt St Ste 317, Portland, OR 97213-2982.
- What is Diana Negreanu's phone number?
- The practice phone number listed in the NPPES registry for Diana Negreanu is (503) 256-4096.
- Does Diana Negreanu accept Medicare?
- Diana Negreanu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Negreanu's NPI active?
- Yes — Diana Negreanu's NPI (1538282447) is active in the NPPES registry as of the last update on 2022-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.