Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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James Lester Neifing, MD

Individual provider Endocrinology, Diabetes & Metabolism Physician · NPI 1437207941

James Lester Neifing, MD is an Endocrinology in Portland, Oregon. Qualified in 1986, 40 years ago. Practices with Portland Diabetes and Endocrinology, a 10-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Oregon.

Years since qualifying
40
Licensed in
OR
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

9135 SW Barnes Rd Ste 985
Portland, OR 97225-6699
Phone: (503) 297-3336
Fax: (503) 297-3338
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence MD15260 (OR)

Record details

NPI number1437207941
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 8, 2007
Last updated in NPPESMarch 7, 2023
Certification dateMarch 16, 2020

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyENDOCRINOLOGY
Medical schoolOTHER
Graduated 1986 (40 years in practice)
Group practice Portland Diabetes And Endocrinology — 10 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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