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

Dr. Ulrich Andreas Duffner, MD

Individual provider Pediatrics Physician · NPI 1235342569

Dr. Ulrich Andreas Duffner, MD is a Hematology in Grand Rapids, Michigan. Qualified in 1990, 36 years ago. Practices with Spectrum Health Hospitals, a 165-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
36
Licensed in
MI
In the registry since
2007
Specialties on file
2
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

35 Michigan St NE Fl 2
Grand Rapids, MI 49503-2514
Phone: (616) 267-1925
Fax: (616) 267-1005
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Hematology & Oncology Physician (primary) Taxonomy 2080P0207X · Licence 4301086993 (MI)
Pediatrics Physician Taxonomy 208000000X · Licence 4301086993 (MI)

Record details

NPI number1235342569
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 7, 2007
Last updated in NPPESMay 8, 2025
Certification dateMay 8, 2025
Mailing address100 Michigan St Ne # Mc845, Grand Rapids, MI 49503-2560

Medicare enrollment

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

Medicare specialtyHEMATOLOGY
Also practisesPEDIATRIC MEDICINE
Medical schoolOTHER
Graduated 1990 (36 years in practice)
Group practice Spectrum Health Hospitals — 165 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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