Diana C. Negreanu, MD
Specialist · Portland, OR
Diana C. Negreanu, MD is a specialist with a practice address in Portland, Oregon, and NPI 1538282447, issued on Apr 6, 2007. Check the license (Oregon LL16507, as entered in NPPES) with the Oregon board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Diana C. Negreanu
- Credential
- MD
- Primary taxonomy
- Specialist 174400000X
- License number
- LL16507 OR
Self-reported in NPPES; status is on the state search - Practice location
- 5050 NE Hoyt St Ste 317, Portland, OR 97213
- Phone
- (503) 256-4096
- Enumerated
- Apr 6, 2007
- Record last updated
- May 12, 2022
- Fax
- (503) 256-0101
- Medicare enrollment
- Enrolled (PECOS I20071029000442); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Verify Diana C. Negreanu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this profession
Search for license LL16507Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% more Medicare Part D claims than the average specialist in 2024
1,398 Medicare Part D claims for 207 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 46% of claims.
Most prescribed
- Levothyroxine Sodium226 claims
- Synthroid128 claims
- Methimazole69 claims
- Hydrocortisone52 claims
- Hydrochlorothiazide49 claims
- Jardiance47 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- The Endocrine Clinic PCPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Specialist providers in Oregon
There are 1,085 specialist records in Oregon.
Other specialist records in Oregon
- Taylor AbrigoPortland, OR1487438586
- Jeffrey Absalon, MDBend, OR1225003833
- Christopher Adams, CRMAlbany, OR1972213577
- Ross Adams, LMTAshland, OR1477088524
- Daryl Adamson, MDPortland, OR1366445868
- Maria AddessiSalem, OR1124351010
- Alma AguirreKlamath Falls, OR1821474685
- Sheila Ahern, CPEPortland, OR1356709448
- Kyra Ahlstrom, LMTPortland, OR1649577073
- Lynn AkerBeaverton, OR1447700547
Common questions
What is Diana C. Negreanu, MD's NPI number?
Diana C. Negreanu, MD's National Provider Identifier (NPI) is 1538282447, issued on Apr 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Diana C. Negreanu, MD located?
The NPPES record lists a practice address at 5050 NE Hoyt St Ste 317, Portland, OR, 97213. Phone: (503) 256-4096. Providers update this record themselves, so call before visiting.
How can I verify Diana C. Negreanu, MD's license?
NPPES lists Oregon license number LL16507, as entered by the provider. Search the Oregon board that licenses this profession; the NPPES record confirms identity only.
How much does Diana C. Negreanu, MD prescribe under Medicare Part D?
In 2024, Diana C. Negreanu, MD had 1,398 Medicare Part D claims for 207 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.