NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Donielle F Sliwa, MD, MPH

Medical Oncology Physician in Dover, NH · enumerated 2012.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1376809277

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Donielle F Sliwa
Credential MD, MPH
Sex Female
Practice address 789 Central Ave, Dover, NH, 03820
Phone (603) 742-8787
Enumeration date Apr 4, 2012
Last updated in NPPES Aug 14, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 252824 (MA) Secondary
207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 294514 (NY) Secondary
207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 33217 (NH) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1376809277 active?
Yes, as of the latest NPPES snapshot, NPI 1376809277 is active (record last updated 2024-08-14).
How do I verify Donielle Sliwa's NPI record?
Cross-check NPI 1376809277 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-08-14.