Providers Helen Duewel, MD to Katherine Duff, LPC
300 individual NPIs in the federal registry, part 5,853 of 24,427 of the A to Z by surname. Each row is the registry's record: the name and credential, the NPI, the primary specialty, the practice city and the year the NPI was issued. 86 link to a page of their own with Medicare and CMS data the registry does not carry.
| Provider | NPI | Specialty | Practice city | NPI issued |
|---|---|---|---|---|
| Helen Duewel, MD | 1962552364 | Internal Medicine Physician | Portland, OR | 2007 |
| Lynn Duewel, OTR | 1164627311 | Occupational Therapist | Marshfield, WI | 2007 |
| Nathan Duewel | 1548491392 | Physical Therapist | Shawnee, KS | 2009 |
| Ethan Duewer, DMD | 1972023117 | Dentist | Springfield, IL | 2017 |
| Kelly Duewer, PA | 1649388935 | Physician Assistant | Raleigh, NC | 2006 |
| Colleen Duewiger, RD | 1659634335 | Registered Dietitian | Las Vegas, NV | 2012 |
| Rachel Duewiger, PHARMD | 1265253967 | Pharmacist | Lockport, NY | 2024 |
| Akiro Duey | 1083473987 | Student in an Organized Health Care Education/Training Program | New York, NY | 2024 |
| Amber Duey, LSW | 1720151913 | Case Manager/Care Coordinator | Devils Lake, ND | 2006 |
| Ashley Duey, FNP | 1679824395 | Family Nurse Practitioner | Springfield, MO | 2012 |
| Deborah Duey, CNS, APRN | 1780849059 | Adult Health Clinical Nurse Specialist | Park Ridge, IL | 2008 |
| Derek Duey | 1275162075 | Student in an Organized Health Care Education/Training Program | Atlanta, GA | 2020 |
| Douglas Duey, DDS | 1629070784 | Dentist | San Antonio, TX | 2005 |
| Duane Duey, ATC-R | 1275597460 | Student in an Organized Health Care Education/Training Program | Portland, OR | 2006 |
| Dustin Duey, PHARMD | 1396310207 | Pharmacist | Topeka, KS | 2021 |
| Elizabeth Duey, MSN, RN, CNS | 1629765375 | Pediatric Clinical Nurse Specialist | Modesto, CA | 2023 |
| Gary Duey, O.D. | 1669470480 | Optometrist | Marietta, GA | 2005 |
| Jassmine Duey, RN | 1871110429 | Registered Nurse | Stevens Point, WI | 2020 |
| Jennell Duey, MD | 1275619918 | Family Medicine Physician | Billings, MT | 2006 |
| Jon Michael Duey | 1881858868 | Psychiatric/Mental Health Nurse Practitioner | Berkeley, CA | 2008 |
| Joyce Duey, PT | 1205822244 | Physical Therapist | Clinton, IA | 2005 |
| Katherine Duey | 1861770323 | Women's Health Nurse Practitioner | Virginia Beach, VA | 2011 |
| Kaylin Duey | 1285586784 | Behavior Technician | Grand Rapids, MI | 2026 |
| Krystle Duey | 1871139147 | Behavior Technician | West Branch, MI | 2019 |
| Mallory Duey | 1003317827 | Speech-Language Pathologist | Flint, MI | 2018 |
| Marilyn Duey | 1417084484 | Internal Medicine Physician | Boulder, CO | 2007 |
| Meghan Duey, RDH | 1669998977 | Dental Hygienist | Portland, OR | 2017 |
| Michael Duey, MD | 1558399915 | Anesthesiology Physician | Portland, OR | 2006 |
| Patrick Duey, MD | 1073695342 | Anesthesiology Physician | Billings, MT | 2006 |
| Richard Duey, MD | 1235355587 | Orthopaedic Surgery Physician | Boerne, TX | 2007 |
| Robert Duey, PHARM D | 1366529588 | Pharmacist | Castro Valley, CA | 2006 |
| Sarah Duey | 1548807241 | Behavior Technician | Largo, FL | 2019 |
| Allison Duey Holtz, APNP | 1285685214 | Pediatric Nurse Practitioner | Milwaukee, WI | 2006 |
| August Duez, RPH | 1902129992 | Pharmacist | Pekin, IL | 2010 |
| Emily Duez, AGPCNP | 1134790298 | Adult Health Nurse Practitioner | Youngstown, OH | 2021 |
| Lisa Duez, LCSW | 1104156231 | Clinical Social Worker | Virginia Beach, VA | 2010 |
| Teresa Duez, PPS CREDENTIAL | 1104163302 | Counselor | Placentia, CA | 2013 |
| Timothy Duez, DDS | 1841396538 | Dentist | Dekalb, IL | 2006 |
| Claire Dufala | 1700253515 | Psychiatric/Mental Health Nurse Practitioner | Portland, OR | 2015 |
| Jennifer Dufala | 1831866375 | Chiropractor | Medina, OH | 2021 |
| Steven Dufala, PHARMD | 1487578746 | Compounded Sterile Preparations Pharmacist | Sandy Springs, GA | 2026 |
| Willis Dufala | 1396470027 | Mental Health Counselor | Portland, OR | 2022 |
| Cheyenne Dufall, LCSW | 1316767569 | Clinical Social Worker | Philadelphia, PA | 2024 |
| Jessica Dufalla | 1487431888 | Behavior Analyst | Pittsburgh, PA | 2023 |
| Cornelius Dufallo, LCSW | 1245630235 | Clinical Social Worker | New York, NY | 2014 |
| Tarek Dufan, M.D. | 1356585293 | Radiation Oncology Physician | Bismarck, ND | 2009 |
| Jalal Dufani, MD | 1619457868 | Internal Medicine Physician | Omaha, NE | 2018 |
| Alexander Dufano | 1831626910 | Physical Therapist | Pace, FL | 2017 |
| Brianda Dufau | 1457295552 | Behavior Technician | Downey, CA | 2026 |
| Jennifer Dufau, M.A., CCC-SLP | 1457831133 | Speech-Language Pathologist | West Chester, OH | 2018 |
| Dominique Dufauchard | 1811658297 | Behavior Technician | Chicago, IL | 2022 |
| Kya Dufauchard | 1205611332 | Personal Care Attendant | Metairie, LA | 2023 |
| Michael Dufauchard, CTRS | 1427081397 | Recreation Therapist | Pueblo, CO | 2006 |
| Abbegail Dufault | 1164317392 | Counselor | Waconia, MN | 2025 |
| Anna Dufault, MD | 1962448894 | Obstetrics & Gynecology Physician | Yakima, WA | 2006 |
| Ashley Dufault | 1215714761 | Mental Health Counselor | Taunton, MA | 2023 |
| Bonnie Dufault | 1023667995 | Attendant Care Provider | Indiana, IA | 2019 |
| Brittany Dufault | 1043619950 | Athletic Trainer | Grand Forks, ND | 2014 |
| Clare Dufault | 1447856448 | Personal Care Attendant | Grand Forks, ND | 2020 |
| Danielle Dufault, MA | 1487862777 | Marriage & Family Therapist | Seattle, WA | 2007 |
| Darin Dufault, M.D. | 1972824787 | Gastroenterology Physician | Charleston, SC | 2010 |
| Emma Dufault | 1548750391 | Behavior Technician | Worcester, MA | 2018 |
| Helena Dufault, LCSW, ACT | 1689238941 | Clinical Social Worker | Sioux Falls, SD | 2019 |
| Jacqueline Dufault, LICSW | 1992944953 | Clinical Social Worker | Forestdale, MA | 2009 |
| Jeffrey Dufault, DPM | 1275504417 | Foot & Ankle Surgery Podiatrist | Bonham, TX | 2006 |
| Jessica Dufault, DPT, ATC | 1245345628 | Physical Therapist | Madison, WI | 2006 |
| Joel Dufault, BCBA | 1285122556 | Behavior Analyst | San Diego, CA | 2018 |
| Katelyn Dufault, NP | 1972013852 | Family Nurse Practitioner | Norway, ME | 2017 |
| Kelsey Dufault, M.S., OTR/L | 1265802896 | Pediatric Occupational Therapist | Fountain Valley, CA | 2015 |
| Kyle Dufault, RPH | 1457737041 | Pharmacist | West Springfield, MA | 2015 |
| Leah Dufault | 1306454160 | Behavior Technician | Marlborough, MA | 2020 |
| Maeve Dufault, AMFT | 1316561228 | Marriage & Family Therapist | San Francisco, CA | 2020 |
| Maggie Dufault, DPT | 1427605526 | Physical Therapist | Warwick, RI | 2019 |
| Marialena Dufault, PT | 1366408114 | Physical Therapist | Golden Valley, MN | 2006 |
| Mark Dufault, PT | 1891898268 | Physical Therapist | Raleigh, NC | 2006 |
| Megan Dufault, BCBA | 1720611171 | Behavior Analyst | Fargo, ND | 2020 |
| Melissa Dufault | 1043136518 | Flight Registered Nurse | Greene, ME | 2026 |
| Nathan Dufault, ATC, LAT | 1518243237 | Athletic Trainer | Madison, WI | 2011 |
| Nicole Dufault, PHARMD | 1306296124 | Pharmacist | Ocean Springs, MS | 2016 |
| Olivia Dufault, RN | 1336098342 | Registered Nurse | Milford, MA | 2026 |
| Paul Dufault, M.D. | 1174562177 | Internal Medicine Physician | Worcester, MA | 2006 |
| Robin Dufault, LPN | 1912146895 | Licensed Practical Nurse | Ticonderoga, NY | 2009 |
| Sophie Dufault, M.F.T. | 1730219189 | Marriage & Family Therapist | Redwood City, CA | 2007 |
| Vanessa Dufault, MD | 1760775548 | Family Medicine Physician | Buffalo, MN | 2011 |
| Austin Dufault-Feinberg, AMFT, APCC | 1093546475 | Marriage & Family Therapist | Irvine, CA | 2024 |
| David Dufeck, OD | 1003927278 | Optometrist | De Pere, WI | 2006 |
| Brandi Dufek, B.A. | 1538418496 | Behavior Analyst | Salt Lake City, UT | 2012 |
| Daniel Dufek | 1871480251 | Peer Specialist | Eagan, MN | 2025 |
| Elizabeth Dufek, MA | 1346466828 | Mental Health Counselor | Delta, CO | 2007 |
| Ellie Dufek | 1033065008 | Speech-Language Pathologist | Los Angeles, CA | 2026 |
| Griffin Dufek | 1477446235 | Internal Medicine Physician | Grand Blanc, MI | 2025 |
| Ha Dufek, LPCC, LADC | 1821611039 | Professional Counselor | Minneapolis, MN | 2020 |
| Jamie Dufek, BSW | 1528204021 | Mental Health Counselor | Green Bay, WI | 2009 |
| Katelyn Dufek | 1851815724 | Mental Health Counselor | Seattle, WA | 2017 |
| Kendall Dufek, MOT, OTR/L | 1306501036 | Occupational Therapist | Villa Park, IL | 2021 |
| Kyle Dufek | 1932717022 | Mental Health Counselor | Coon Rapids, MN | 2020 |
| Marlene Dufek | 1447979158 | Attendant Care Provider | Lincoln, NE | 2022 |
| Michael Dufek, OPC | 1891746392 | Optometrist | Miami, FL | 2006 |
| Monika Dufek | 1588119440 | Physical Therapy Assistant | Daytona Beach, FL | 2016 |
| Nicole Dufek, LCSW | 1215659594 | Clinical Social Worker | Green Bay, WI | 2022 |
| Rebecca Dufek, LPC | 1366817975 | Mental Health Counselor | Oklahoma City, OK | 2015 |
| Sarah Dufek, PH.D., BCBA-D | 1831503762 | Psychologist | White Plains, NY | 2014 |
| Shannon Dufek, PA-C | 1114598638 | Physician Assistant | Lanse, MI | 2021 |
| Suzanne Dufek, CRNA | 1689740177 | Certified Registered Nurse Anesthetist | Cape Girardeau, MO | 2006 |
| Audrey Dufel | 1457651895 | Physical Therapist | Salt Lake City, UT | 2010 |
| Cari Dufel, LMSW | 1265662167 | Clinical Social Worker | Grand Rapids, MI | 2009 |
| Susan Dufel, M.D. | 1467584185 | Emergency Medicine Physician | Hartford, CT | 2007 |
| John Dufendach, M.D. | 1689618399 | Emergency Medicine Physician | Gettysburg, PA | 2006 |
| Kaitlyn Dufendach | 1124424056 | Clinical Social Worker | Denver, CO | 2014 |
| Keith Dufendach, MD | 1821525429 | Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician | Muskegon, MI | 2017 |
| Kevin Dufendach, MD | 1942510383 | Neonatal-Perinatal Medicine Physician | Cincinnati, OH | 2010 |
| Michael Dufer | 1154902104 | Pharmacist | Pittsburgh, PA | 2021 |
| Daniel Dufera, D.D.S. | 1548570674 | Dentist | Silver Spring, MD | 2010 |
| Hana Dufera | 1114483047 | Registered Respiratory Therapist | Silver Spring, MD | 2019 |
| Rabira Dufera, MD | 1548848765 | Internal Medicine Physician | Coon Rapids, MN | 2021 |
| Moreen Dufermont, LSW | 1457586406 | Social Worker | Bound Brook, NJ | 2009 |
| Aaron Duff | 1538826169 | Case Manager/Care Coordinator | McAlester, OK | 2021 |
| Abbie Duff | 1538749015 | Day Training/Habilitation Specialist | Anchorage, AK | 2021 |
| Alexander Duff, DC | 1205398732 | Chiropractor | Boulder, CO | 2019 |
| Alexandra Duff, PLADC | 1295239341 | Addiction (Substance Use Disorder) Counselor | Hastings, NE | 2018 |
| Alexis Duff, PA | 1033073085 | Physician Assistant | Tulsa, OK | 2025 |
| Alexis Duff | 1366154643 | Personal Care Attendant | Huntington, WV | 2022 |
| Aliceia Duff, MSW, LCSWA | 1487270708 | Clinical Social Worker | Gastonia, NC | 2020 |
| Allison Duff | 1245821297 | Clinical Social Worker | Prestonsburg, KY | 2021 |
| Alysandra Duff | 1417706359 | Behavior Technician | Baytown, TX | 2024 |
| Amanda Duff, LMFT-A | 1205656469 | Marriage & Family Therapist | Charleston, SC | 2024 |
| Amanda Duff | 1427942614 | Case Manager/Care Coordinator | Upper Arlington, OH | 2025 |
| Amanda Duff, LPN | 1801028345 | Licensed Practical Nurse | Durham, NC | 2009 |
| Amber Duff, LPC | 1992011159 | Professional Counselor | Lynchburg, VA | 2010 |
| Amy Duff, M.S.W. | 1447440805 | Social Worker | Coldwater, MI | 2007 |
| Amy Duff, DO | 1922748342 | Internal Medicine Physician | Myrtle Beach, SC | 2022 |
| Andrea Duff, MSW, LCSW | 1013683184 | Clinical Social Worker | Springfield, MO | 2021 |
| Andrea Duff, M.A, | 1649357419 | Mental Health Counselor | Albuquerque, NM | 2006 |
| Andrew Duff | 1801557640 | Case Manager/Care Coordinator | Springfield, OH | 2022 |
| Angela Duff, MD | 1134069701 | Student in an Organized Health Care Education/Training Program | Columbus, OH | 2026 |
| Annalyssa Duff, MS, SLP | 1518746916 | Speech-Language Pathologist | Zephyrhills, FL | 2023 |
| Anthony Duff | 1073030250 | Home Health Aide | Shreveport, LA | 2017 |
| Antoinette Duff | 1023968849 | Acute Care Nurse Practitioner | Bridgewater, MA | 2026 |
| Aquicha Duff, LCSW-A | 1558714667 | Clinical Social Worker | Greensboro, NC | 2016 |
| Arlene Duff | 1558453456 | Addiction (Substance Use Disorder) Counselor | Bemidji, MN | 2006 |
| Arthur Duff, MD | 1649261553 | Pediatric Adolescent Medicine Physician | Fort Drum, NY | 2005 |
| Ashlee Duff, FNP | 1659964484 | Family Nurse Practitioner | Brunswick, ME | 2021 |
| Ashley Duff, LPC | 1407596471 | Professional Counselor | The Woodlands, TX | 2022 |
| Ashley Duff, CPNP | 1497003065 | Pediatric Nurse Practitioner | Phoenix, AZ | 2012 |
| Austin Duff | 1578056164 | Behavior Analyst | Youngsville, LA | 2018 |
| Bailee Duff | 1659195337 | Student in an Organized Health Care Education/Training Program | Louisville, KY | 2024 |
| Bethany Duff, MD | 1750675724 | Family Medicine Physician | Manhattan, KS | 2011 |
| Betty Duff, LPC | 1356678072 | Professional Counselor | Austin, TX | 2009 |
| Billie Duff | 1063001246 | Personal Care Attendant | Parkersburg, WV | 2021 |
| Bradly Duff | 1821709155 | Behavior Technician | West Chester, OH | 2022 |
| Brandon Duff | 1023461779 | Licensed Practical Nurse | Kennett, MO | 2016 |
| Breanna Duff | 1932717907 | Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist | Athens, OH | 2020 |
| Brian Duff, MD | 1447411145 | Family Medicine Physician | Nixa, MO | 2008 |
| Brian Duff, D.C. | 1619246345 | Chiropractor | Plainfield, IL | 2011 |
| Brian Duff, MD | 1659489714 | Otology & Neurotology Physician | Providence, RI | 2006 |
| Brian Duff, OTR/L, MSOT | 1992199715 | Occupational Therapist | San Antonio, TX | 2015 |
| Caleb Duff | 1184494163 | Licensed Practical Nurse | Maxwelton, WV | 2024 |
| Carla Duff, ARNP | 1104119742 | Pediatric Nurse Practitioner | St Petersburg, FL | 2011 |
| Carla Duff, DDS | 1427166438 | Dentist | Springfield, MO | 2006 |
| Carrie Duff, PT | 1700937349 | Physical Therapist | Zionsville, IN | 2007 |
| Carrinthia Duff, REGISTERED NURSE | 1295627784 | Registered Nurse | Pleasant Grove, AL | 2025 |
| Carter Duff | 1346965845 | Physical Therapist | Oak Ridge, TN | 2022 |
| Cassandra Duff | 1215089727 | Clinical Social Worker | Bronx, NY | 2007 |
| Chanae Duff | 1982212460 | Mental Health Counselor | Berwyn, IL | 2020 |
| Chardonay Duff | 1134090632 | Personal Care Attendant | Omaha, NE | 2025 |
| Chris Duff | 1144689357 | Athletic Trainer | Tafton, PA | 2016 |
| Christa Duff, APRN | 1295201432 | Nurse Practitioner | Hazard, KY | 2018 |
| Christina Duff, DOULA, CBE | 1902476021 | Doula | Havertown, PA | 2021 |
| Christine Duff, CRNA | 1518987874 | Certified Registered Nurse Anesthetist | Altoona, PA | 2006 |
| Christine Duff, PHARMD | 1598079238 | Pharmacotherapy Pharmacist | Cleveland, OH | 2010 |
| Christopher Duff, BCBA | 1346758364 | Behavior Analyst | Oakland, CA | 2018 |
| Christopher Duff, PHARM.D. | 1417041294 | Pharmacist | Talihina, OK | 2006 |
| Christopher Duff | 1750162475 | Certified Registered Nurse Anesthetist | Omaha, NE | 2023 |
| Chuck Duff | 1386246817 | Mental Health Counselor | Mt Prospect, IL | 2020 |
| Claudette Duff, L.C.S.W. | 1215098280 | Clinical Social Worker | Staten Island, NY | 2006 |
| Cline Duff | 1710755376 | Community Health Worker | Nampa, ID | 2023 |
| Colleen Duff, ATC | 1316306004 | Athletic Trainer | Chicago, IL | 2016 |
| Connor Duff, DC | 1518730985 | Chiropractor | Salem, OR | 2023 |
| Cortney Duff, DPT | 1275957730 | Physical Therapist | Bethlehem, PA | 2014 |
| Courtnie Duff, LPN | 1447848411 | Licensed Practical Nurse | Dodson, LA | 2021 |
| Craig Duff | 1538669262 | Peer Specialist | Kansas, OK | 2018 |
| Cristin Duff, OT | 1972213635 | Occupational Therapist | Albuquerque, NM | 2022 |
| Curtis Duff | 1487584546 | Behavior Technician | Columbus, OH | 2026 |
| Cynthia Duff, PT, ATP | 1578853396 | Physical Therapist | Denver, CO | 2011 |
| Dakota Duff, DMD | 1184513335 | General Practice Dentistry | Big Rapids, MI | 2025 |
| Dana Duff, PA-C | 1184614950 | Physician Assistant | Nashville, TN | 2005 |
| Dana Duff, CPNP-PC | 1396210472 | Pediatric Nurse Practitioner | Talladega, AL | 2018 |
| Daniel Duff | 1700645751 | Case Manager/Care Coordinator | Northampton, MA | 2024 |
| Danielle Duff, MS, LBA, BCBA | 1386169373 | Behavior Analyst | Lexington, KY | 2017 |
| Danielle Duff, PA-C | 1386405959 | Physician Assistant | Cincinnati, OH | 2024 |
| Darlene Duff, LCMHC | 1316189913 | Mental Health Counselor | Montpelier, VT | 2009 |
| David Duff | 1003435801 | Dermatology Physician | North Charleston, SC | 2020 |
| David Duff, CRNA | 1306931860 | Certified Registered Nurse Anesthetist | Lexington, KY | 2006 |
| David Duff, CRNA | 1538127071 | Certified Registered Nurse Anesthetist | Orlando, FL | 2006 |
| David Duff | 1538380852 | Physical Therapist | Muscle Shoals, AL | 2007 |
| David Duff, MD | 1588669642 | Family Medicine Physician | London, OH | 2005 |
| David Duff | 1629748595 | Case Manager/Care Coordinator | Athens, TN | 2021 |
| David Duff, M.D. | 1689055964 | Anesthesiology Physician | Greenville, SC | 2015 |
| Dawn Duff, P.A.-C. | 1538142831 | Medical Physician Assistant | Tamc, HI | 2005 |
| Dawnielle Duff | 1144654161 | Personal Care Attendant | Saint Louis, MO | 2013 |
| Deandra Duff, LCSW #766 | 1164722997 | Clinical Social Worker | Cheyenne, WY | 2010 |
| Deanne Duff, LMP, RC | 1639223589 | Massage Therapist | Kent, WA | 2007 |
| Debbie Duff, MAPC, LCADC, LPCC | 1952738312 | Mental Health Counselor | Harlan, KY | 2013 |
| Dedra Duff, FSP, PEER SPECIALIST | 1841985413 | Peer Specialist | Tulsa, OK | 2023 |
| Deiter Duff, M.D. | 1689961906 | Anatomic Pathology & Clinical Pathology Physician | Columbia, MO | 2011 |
| Deja Duff | 1982277463 | Behavior Technician | Gastonia, NC | 2021 |
| Delta Duff, PMHNP | 1063067908 | Psychiatric/Mental Health Nurse Practitioner | McMinnville, OR | 2019 |
| Denise Duff | 1467457184 | Diagnostic Radiology Physician | Charlotte, NC | 2005 |
| Derrius Duff | 1124727243 | Behavior Technician | Bakersfield, CA | 2023 |
| Destiny Duff | 1598622276 | Other Technician | Melbourne, FL | 2026 |
| Diana Duff, RN | 1376132589 | Registered Nurse | Jacksonville, FL | 2021 |
| Diana Duff, M.D. | 1841250115 | Obstetrics & Gynecology Physician | Pearland, TX | 2006 |
| Diane Duff, CRNP | 1215260195 | Adult Health Nurse Practitioner | Akron, OH | 2009 |
| Don Duff, MD | 1154325900 | Nephrology Physician | Louisville, KY | 2005 |
| Don Duff, FNP-C | 1588606636 | Nurse Practitioner | Chattanooga, TN | 2006 |
| Donna Duff, FNP-C | 1598191025 | Family Nurse Practitioner | Chattanooga, TN | 2013 |
| Dorothy Duff, PHD | 1710020797 | Psychologist | Albuquerque, NM | 2007 |
| Dyan Duff, RPH | 1710100961 | Pharmacist | Decatur, GA | 2007 |
| Dyllon Duff | 1558293969 | Behavior Technician | Silver Spring, MD | 2026 |
| Eddie Duff, R.PH. | 1770790941 | Pharmacist | Booneville, KY | 2007 |
| Elenora Duff | 1891143988 | Behavior Analyst | Bellmore, NY | 2016 |
| Eliana Duff | 1417620394 | Attendant Care Provider | La Center, WA | 2021 |
| Elizabeth Duff, M.A. | 1528277530 | Speech-Language Pathologist | Austin, TX | 2007 |
| Elizabeth Duff, RN | 1992930473 | Registered Nurse | Cheyenne, WY | 2009 |
| Emily Duff | 1245912039 | Massage Therapist | Armonk, NY | 2023 |
| Emily Duff, PHARMD | 1326828153 | Pharmacist | Newport News, VA | 2023 |
| Emily Duff, PHARMD | 1831019744 | Critical Care Pharmacist | Boston, MA | 2026 |
| Emma Duff, RN | 1205372141 | Registered Nurse | Wilkes Barre, PA | 2017 |
| Erica Duff | 1316750607 | Behavior Technician | West Lafayette, IN | 2025 |
| Erica Duff | 1558991760 | Developmental Therapist | Milford, MA | 2020 |
| Erin Duff, MS | 1184993529 | Mental Health Counselor | Parkersburg, WV | 2011 |
| Erin Duff, FNP-C | 1306192489 | Family Nurse Practitioner | Vestal, NY | 2012 |
| Erin Duff, NP | 1326131913 | Nurse Practitioner | Durham, NC | 2006 |
| Erin Duff, N.P. | 1629329867 | Family Nurse Practitioner | Knox, IN | 2012 |
| Frances Duff, RD | 1255667861 | Registered Dietitian | Rocky Mount, NC | 2009 |
| Gabriella Duff | 1053239459 | Psychologist | Ferndale, MI | 2026 |
| Garth Duff, DMD | 1477655405 | General Practice Dentistry | Presque Isle, ME | 2006 |
| Gary Duff, DDS | 1497885123 | Dentist | Cambridge, OH | 2007 |
| Georgia Duff | 1396436317 | Speech-Language Pathologist | Thomas, OK | 2023 |
| Glory Duff | 1407589500 | Professional Counselor | Bowling Green, KY | 2022 |
| Grace Duff | 1114658150 | Behavior Analyst | St Louis Park, MN | 2022 |
| Gregory Duff, M.D. | 1952374290 | Orthopaedic Surgery Physician | Silverdale, WA | 2006 |
| Haley Duff, APRN | 1396304697 | Family Nurse Practitioner | Lamar, AR | 2019 |
| Hannah Duff, DPT | 1275159816 | Physical Therapist | Charlottesville, VA | 2020 |
| Hannah Duff | 1457719734 | Behavior Analyst | Portsmouth, NH | 2016 |
| Hannah Duff, RN | 1982997037 | Registered Nurse | Knoxville, TN | 2011 |
| Hayden Duff | 1508636754 | Behavior Technician | Southfield, MI | 2024 |
| Heather Duff, L.M.T | 1174733273 | Specialist | Portland, OR | 2007 |
| Heather Duff, NP | 1306388392 | Nurse Practitioner | The Woodlands, TX | 2016 |
| Heather Duff, PA-C | 1851765838 | Physician Assistant | Pelham, NH | 2015 |
| Heidi Duff, PA-C | 1588855381 | Medical Physician Assistant | Maryville, IL | 2007 |
| Hilay Duff | 1922642321 | Behavior Technician | Plymouth, MN | 2019 |
| Isaiah Duff, LMT | 1225662513 | Massage Therapist | Bozeman, MT | 2020 |
| James Duff, CRNA | 1184616484 | Certified Registered Nurse Anesthetist | Lexington, KY | 2005 |
| James Duff, PHD | 1336244102 | Mental Health Counselor | Bellingham, WA | 2006 |
| James Duff | 1417832494 | Family Nurse Practitioner | West Liberty, KY | 2025 |
| James Duff, DDS | 1780607713 | General Practice Dentistry | Richmond, VA | 2006 |
| James Duff, MD | 1992831291 | Anatomic Pathology & Clinical Pathology Physician | Abilene, TX | 2007 |
| Jamie Duff, RPH | 1376376723 | Pharmacist | Ronan, MT | 2024 |
| Janeen Duff, RDH | 1508018169 | Dental Hygienist | Loma Linda, CA | 2008 |
| Janelle Duff | 1659768752 | Occupational Therapist | Cromwell, CT | 2015 |
| Janet Duff, RN, MSN | 1568952315 | Registered Nurse | Columbia, SC | 2018 |
| Janett Duff | 1346474285 | Licensed Practical Nurse | Bronx, NY | 2009 |
| Jasmine Duff, PT, DPT | 1659113884 | Physical Therapist | Marietta, GA | 2024 |
| Jason Duff, PSYD STUDENT, NP | 1245383959 | Student in an Organized Health Care Education/Training Program | Trenton, NJ | 2007 |
| Jeffrey Duff, RPH | 1053637421 | Pharmacist | Winter Haven, FL | 2010 |
| Jeneal Duff, PA-C | 1346709052 | Medical Physician Assistant | Byron Center, MI | 2019 |
| Jenna Duff | 1003409194 | Personal Care Attendant | Parkersburg, WV | 2021 |
| Jenna Duff | 1265228704 | Physical Therapist | Denver, CO | 2025 |
| Jennifer Duff, APN | 1033148796 | Pediatric Nurse Practitioner | Chicago, IL | 2006 |
| Jennifer Duff, ATC, LAT | 1174880520 | Athletic Trainer | Buford, GA | 2012 |
| Jennifer Duff, MD | 1275622060 | Internal Medicine Physician | Gainesville, FL | 2006 |
| Jennifer Duff | 1407443179 | Behavior Technician | Carlsbad, CA | 2020 |
| Jennifer Duff, OTA | 1467821108 | Occupational Therapy Assistant | Buffalo, NY | 2015 |
| Jennifer Duff, PSY.D. | 1649492315 | Clinical Psychologist | Naperville, IL | 2007 |
| Jessica Duff | 1467069906 | Homemaker | Summersville, WV | 2020 |
| Jessica Duff | 1831056035 | Home Health Aide | Ashford, WV | 2026 |
| Jillian Duff, PT., PH.D. | 1821338724 | Ergonomics Physical Therapist | South Orange, NJ | 2013 |
| Jocelyn Duff, DPT | 1144141029 | Physical Therapist | Superior, CO | 2026 |
| Jocelyn Duff, PA | 1558404665 | Medical Physician Assistant | Salisbury, MA | 2007 |
| Joel Duff, MD | 1386038651 | Urology Physician | Brookhaven, MS | 2015 |
| John Duff, MD | 1225125222 | Family Medicine Physician | Midland, MI | 2006 |
| John Duff, LMSW | 1568904589 | Social Worker | Jefferson Valley, NY | 2016 |
| John Duff, D.C. | 1598971582 | Chiropractor | Peoria, AZ | 2007 |
| John Duff, O.D. | 1629033394 | Optometrist | Brattleboro, VT | 2006 |
| John Duff, MA, ATC | 1861902553 | Athletic Trainer | Denver, CO | 2017 |
| John Duff | 1952772337 | Mental Health Counselor | McAlester, OK | 2015 |
| John Duff | 1962732719 | Addiction (Substance Use Disorder) Counselor | Nevada City, CA | 2009 |
| Johnathan Duff, PHD | 1548734460 | Psychologist | Falls Church, VA | 2019 |
| Jonathan Duff | 1770479313 | Behavior Analyst | Spokane Valley, WA | 2025 |
| Joni Duff, CRNA | 1861730673 | Certified Registered Nurse Anesthetist | Columbus, GA | 2013 |
| Joseph Duff | 1215515416 | Orthopaedic Foot and Ankle Surgery Physician | Sacramento, CA | 2021 |
| Joseph Duff, APRN | 1609530765 | Psychiatric/Mental Health Nurse Practitioner | Henderson, KY | 2021 |
| Joshlyn Duff | 1487327706 | Personal Care Attendant | Kenova, WV | 2021 |
| Joyce Duff, D.D.S. | 1215953898 | General Practice Dentistry | Aurora, CO | 2006 |
| Julie Duff, APRN | 1457600306 | Obstetrics & Gynecology Nurse Practitioner | Chicago, IL | 2012 |
| Kara-Leigh Duff | 1073281275 | Behavior Technician | Knoxville, TN | 2021 |
| Karin Duff | 1326973371 | Hearing Instrument Specialist | Vallejo, CA | 2026 |
| Kassandra Duff, RN | 1356120356 | Registered Nurse | Wichita, KS | 2023 |
| Katherine Duff, LPC | 1053426130 | Mental Health Counselor | Taos, NM | 2006 |
Source: CMS National Plan and Provider Enumeration System (NPPES) (download.cms.gov). A listing is not a recommendation: check a license with the state board (license lookups).