Providers Lyndsi Sievers, PA-C to Jennifer Sifers, CCC-SLP
300 individual NPIs in the federal registry, part 20,182 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. 112 link to a page of their own with Medicare and CMS data the registry does not carry.
| Provider | NPI | Specialty | Practice city | NPI issued |
|---|---|---|---|---|
| Lyndsi Sievers, PA-C | 1750716726 | Physician Assistant | Alton, IL | 2013 |
| Lynn Sievers, N.P. | 1053780205 | Family Nurse Practitioner | San Francisco, CA | 2015 |
| M.kelly Sievers, CRNA | 1073526455 | Certified Registered Nurse Anesthetist | Portland, OR | 2006 |
| Mallory Sievers, PA-C | 1902379548 | Physician Assistant | Castaic, CA | 2019 |
| Matthew Sievers | 1215209168 | Dentist | Cambridge, MN | 2012 |
| Matthew Sievers, MD | 1417709882 | Student in an Organized Health Care Education/Training Program | San Francisco, CA | 2024 |
| Matthew Sievers | 1740834639 | Physical Therapist | Vincennes, IN | 2019 |
| Maxwell Sievers | 1518642313 | Student in an Organized Health Care Education/Training Program | Ann Arbor, MI | 2023 |
| Meaghan Sievers, MD | 1336998434 | Emergency Medicine Physician | Rochester, MN | 2024 |
| Megan Sievers | 1154799187 | Physical Therapist | Hudsonville, MI | 2015 |
| Megan Sievers, RD, LD | 1427127943 | Registered Dietitian | Saint Louis, MO | 2006 |
| Megan Sievers, PT, DPT | 1538013826 | Physical Therapist | Westlake, OH | 2026 |
| Melissa Sievers, DPT | 1194174102 | Physical Therapist | Tiffin, IA | 2016 |
| Meredith Sievers, AGACNP | 1265157531 | Psychiatric/Mental Health Nurse Practitioner | Boise, ID | 2022 |
| Michael Sievers, R.PH. | 1124238639 | Pharmacist | Fort Wayne, IN | 2007 |
| Michaela Sievers, DC | 1508449554 | Chiropractor | Westminster, CO | 2021 |
| Molly Sievers, DPT | 1376231217 | Physical Therapist | Milwaukee, WI | 2023 |
| Molly Sievers, CPNP-PC | 1992621262 | Pediatric Nurse Practitioner | Saint Louis, MO | 2026 |
| Morgan Sievers | 1811859390 | Professional Counselor | Stockton, CA | 2025 |
| Nicole Sievers, RD CDE | 1265471668 | Registered Dietitian | Kapaa, HI | 2006 |
| Patricia Sievers, DAOM, L.AC. | 1699185355 | Acupuncturist | Manhattan Beach, CA | 2014 |
| Payton Sievers | 1184401887 | Behavior Technician | Evansville, IN | 2023 |
| Penny Sievers, OTR/L | 1366715922 | Occupational Therapist | Waverly, IA | 2012 |
| Quinlan Sievers, MD/PHD | 1700346897 | Medical Oncology Physician | New York, NY | 2019 |
| R Sievers, SLP | 1346466547 | Speech-Language Pathologist | Waterford, WI | 2007 |
| Rachel Sievers, AU.D., CCC-A | 1306079421 | Audiologist | Little Rock, AR | 2009 |
| Rachel Sievers, RBT | 1376193607 | Behavior Technician | Kirkwood, MO | 2019 |
| Ralph Sievers, MD | 1154405579 | Diagnostic Radiology Physician | Anaconda, MT | 2006 |
| Rebecca Sievers, LPCC | 1629444997 | Mental Health Counselor | Fairfield, OH | 2015 |
| Rebecca Sievers | 1639736788 | Behavior Technician | San Diego, CA | 2019 |
| Rebecca Sievers, CMT | 1861457228 | Massage Therapist | Denver, CO | 2006 |
| Richard Sievers, D.O. | 1154442887 | Family Medicine Physician | Dayton, OH | 2007 |
| Richard Sievers, M.D. | 1962407791 | Ophthalmology Physician | Memphis, TN | 2005 |
| Sarah Sievers, DPT | 1053831784 | Physical Therapist | Logan, UT | 2017 |
| Sarah Sievers, L.AC | 1528531720 | Acupuncturist | Leawood Ks 66224, KS | 2019 |
| Sarah Sievers, FNP-C | 1992518294 | Family Nurse Practitioner | Chapel Hill, NC | 2025 |
| Savannah Sievers, PAC | 1407232028 | Physician Assistant | Greeley, CO | 2015 |
| Shannon Sievers, MA | 1962772095 | Marriage & Family Therapist | Indianapolis, IN | 2012 |
| Shelby Sievers, MD | 1043835689 | Pediatric Infectious Diseases Physician | Chicago, IL | 2020 |
| Sherman Sievers, PHD | 1285783365 | Psychologist | Monroe, WI | 2007 |
| Sherri Sievers, RN, CNP | 1518085604 | Nurse Practitioner | Cincinnati, OH | 2007 |
| Stephen Sievers, M.D. | 1174597488 | Nephrology Physician | Glendale, WI | 2006 |
| Tammy Sievers, MD | 1619004694 | Rheumatology Physician | Ventura, CA | 2007 |
| Taryn Sievers, NP-C | 1558713305 | Nurse Practitioner | Neptune City, NJ | 2016 |
| Theodore Sievers, PHARM.D. | 1295286284 | Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist | Los Angeles, CA | 2016 |
| Timothy Sievers, MD | 1811951288 | Pain Medicine (Anesthesiology) Physician | Manchester, NH | 2006 |
| Tina Sievers | 1972318756 | Nurse's Aide | Ralston, NE | 2025 |
| Tyson Sievers, M.D. | 1457795775 | Gastroenterology Physician | Minneapolis, MN | 2013 |
| Valerie Sievers | 1063114544 | Behavior Technician | Lynnwood, WA | 2023 |
| Monica Sievers Otto, PLMHP PLADC | 1558572420 | Addiction (Substance Use Disorder) Counselor | Norfolk, NE | 2007 |
| Sara Sievers Smets, DO | 1205577798 | Student in an Organized Health Care Education/Training Program | Farmington, CT | 2022 |
| Amanda Sievers-Marks, APCC | 1912699422 | Counselor | El Cajon, CA | 2023 |
| Alan Sievert, M.D. | 1770756181 | Public Health & General Preventive Medicine Physician | Braselton, GA | 2008 |
| Alex Sievert, MD | 1497311237 | Internal Medicine Physician | Saint Louis, MO | 2019 |
| Alexandra Sievert, MS, BCBA, LBA | 1538851969 | Behavior Analyst | Louisville, KY | 2023 |
| Alexis Sievert | 1760319719 | Speech-Language Pathologist | Mendota Heights, MN | 2026 |
| Anna Sievert, ARNP | 1245049709 | Family Nurse Practitioner | Davenport, IA | 2024 |
| Bradley Sievert, DMD | 1104963537 | General Practice Dentistry | Lake Oswego, OR | 2007 |
| Chelsey Sievert, APRN | 1194440552 | Nurse Practitioner | Nicholasville, KY | 2022 |
| Courtney Sievert | 1134649445 | Social Worker | Greenfield, WI | 2017 |
| Craig Sievert, MD | 1578674081 | Family Medicine Physician | New Ulm, MN | 2006 |
| Daniel Sievert, DO | 1154016194 | Student in an Organized Health Care Education/Training Program | Milwaukee, WI | 2023 |
| Danielle Sievert | 1134082175 | Behavior Technician | New Orleans, LA | 2025 |
| David Sievert, D.D.S. | 1255548350 | Dentist | Polson, MT | 2007 |
| David Sievert, CRNA | 1801805718 | Certified Registered Nurse Anesthetist | San Antonio, TX | 2006 |
| Dwight Sievert, M.D. | 1841388022 | Psychiatry Physician | Fresno, CA | 2006 |
| Erica Sievert, PHARMD, RPH | 1568294387 | Pharmacist | Lowell, MA | 2024 |
| Frank Sievert, MD | 1366495129 | Family Medicine Physician | Maryville, TN | 2006 |
| Gabriel Sievert | 1063159986 | Speech-Language Pathologist | Wesley Chapel, FL | 2022 |
| Gail Sievert, CRNA | 1558335422 | Certified Registered Nurse Anesthetist | Sioux Falls, SD | 2006 |
| Galen Sievert, PCC-S, LICDC-CS | 1104930858 | Professional Counselor | Coventry Township, OH | 2006 |
| Grace Sievert | 1043044571 | Occupational Therapist | Mesa, AZ | 2024 |
| Hope Sievert | 1144059718 | Family Nurse Practitioner | Appleton, WI | 2024 |
| Horst Sievert, M.D. | 1588711899 | Interventional Cardiology Physician | Washington, DC | 2007 |
| Jennifer Sievert, ARNP | 1336394543 | Family Nurse Practitioner | Lebanon, KY | 2008 |
| Joan Sievert, LCSW | 1407224561 | Clinical Social Worker | Saint Louis, MO | 2015 |
| Kahlua Sievert | 1114577715 | Licensed Vocational Nurse | San Luis Obispo, CA | 2019 |
| Kameron Sievert, OTD | 1760365951 | Occupational Therapist | Brookfield, WI | 2025 |
| Kara Sievert, M.D. | 1235472077 | Anesthesiology Physician | San Diego, CA | 2013 |
| Karen Sievert, PT | 1982821427 | Physical Therapist | Ann Arbor, MI | 2007 |
| Karl-Dietrich Sievert | 1083251680 | Urology Physician | Cheektowaga, NY | 2019 |
| Katherine Sievert, D.D.S. | 1962764571 | General Practice Dentistry | Maplewood, MN | 2012 |
| Kathleen Sievert, FNP-C | 1144984618 | Family Nurse Practitioner | Carmel, IN | 2021 |
| Kayla Sievert, APNP | 1295585099 | Nurse Practitioner | Milwaukee, WI | 2024 |
| Kimberly Sievert, DPT | 1578797999 | Physical Therapist | West Bend, WI | 2009 |
| Kimberly Sievert, OTR/L | 1891755831 | Occupational Therapist | Kansas City, MO | 2006 |
| Kristen Sievert, PHD, LP | 1295248326 | Counseling Psychologist | Ames, IA | 2017 |
| Kristen Sievert, LMFTA | 1700567047 | Marriage & Family Therapist | Seattle, WA | 2023 |
| Kristian Sievert, DMD | 1750675047 | Dentist | Reno, NV | 2011 |
| Krystal Sievert | 1134727803 | Pharmacist | Blaine, MN | 2020 |
| Laura Sievert, M.D. | 1144217233 | Diagnostic Radiology Physician | Columbia, MO | 2005 |
| Lucas Sievert, LMHC | 1821727017 | Mental Health Counselor | Orlando, FL | 2022 |
| Lynn Sievert, NP | 1265482400 | Hematology & Oncology Physician | Clifton Springs, NY | 2006 |
| Marie Sievert | 1285481879 | Case Manager/Care Coordinator | Southfield, MI | 2024 |
| Marilyn Sievert, MS, LLP | 1932688983 | Clinical Psychologist | Ann Arbor, MI | 2018 |
| Mark Sievert, M.D | 1720321912 | Nephrology Physician | Reno, NV | 2013 |
| Martin Sievert, M.D. | 1225392665 | Psychiatry Physician | Eau Claire, WI | 2012 |
| Mary Sievert, LPC, LISAC | 1962645291 | Mental Health Counselor | Chandler, AZ | 2009 |
| Michael Sievert, DDS | 1679660344 | Dentist | Maple Grove, MN | 2006 |
| Michael Sievert, MD | 1831117431 | Psychiatry Physician | Albuquerque, NM | 2006 |
| Mikayla Sievert, MA CCC-SLP | 1669194130 | Speech-Language Pathologist | Columbus, OH | 2022 |
| Natalie Sievert | 1023351434 | Marriage & Family Therapist | Kentfield, CA | 2013 |
| Paul Sievert, MD | 1871560144 | Gastroenterology Physician | Jacksonville, FL | 2006 |
| Rachel Sievert, M.D. | 1043639404 | Obstetrics & Gynecology Physician | Webster, TX | 2014 |
| Robert Sievert, D.O. | 1003895467 | Emergency Medicine Physician | Fort Atkinson, WI | 2006 |
| Rod Sievert | 1063765469 | Behavior Analyst | North Las Vegas, NV | 2012 |
| Rubens Sievert, M.D. | 1639148547 | Endocrinology, Diabetes & Metabolism Physician | Coconut Creek, FL | 2006 |
| Sara Sievert, APSW, SAC-IT | 1154028991 | Social Worker | Waukesha, WI | 2023 |
| Sarah Sievert, PT | 1366755316 | Physical Therapist | Coon Rapids, MN | 2010 |
| Sarah Sievert, LCPC | 1659990661 | Mental Health Counselor | Chicago, IL | 2020 |
| Sayra Sievert, M.D. | 1629030853 | Gynecology Physician | Jacksonville, FL | 2006 |
| Shannon Sievert | 1891221396 | Physical Therapy Assistant | Thornton, CO | 2017 |
| Sherry Sievert, BS, LADC | 1265715148 | Addiction (Substance Use Disorder) Counselor | Detroit Lakes, MN | 2011 |
| Stacey Sievert | 1326485145 | Mental Health Counselor | Milwaukee, WI | 2013 |
| Stacy Sievert, OTR | 1881011971 | Occupational Therapist | Bad Axe, MI | 2014 |
| Summer Sievert, PMHNP | 1962060848 | Psychiatric/Mental Health Nurse Practitioner | Bowling Green, KY | 2019 |
| Tanya Sievert, APNP | 1083181739 | Family Nurse Practitioner | Green Bay, WI | 2018 |
| Thomas Sievert, D.C. | 1245280064 | Chiropractor | Fort Myers, FL | 2006 |
| Vanessa Sievert | 1215292982 | Occupational Therapist | Black Earth, WI | 2012 |
| Veronica Sievert, MD | 1609280189 | Family Medicine Physician | Columbia, MO | 2014 |
| Wendy Sievert, NNP-BC | 1710272554 | Critical Care Neonatal Nurse Practitioner | Damariscotta, ME | 2011 |
| William Sievert, MD | 1083698666 | Family Medicine Physician | Blaine, MN | 2005 |
| William Sievert | 1760966071 | Peer Specialist | Grove, OK | 2018 |
| William Sievert | 1992857791 | Contractor | Virginia Beach, VA | 2007 |
| Amy Sievert Okeefe, MS | 1356313514 | Audiologist | Saint Paul, MN | 2006 |
| Adrienne Sievert Rombach, LCSWA, MSW | 1962943845 | Clinical Social Worker | Cary, NC | 2017 |
| Bailey Sieverts | 1669291811 | Behavior Technician | St George, UT | 2024 |
| Jill Sieverts, LMFT | 1457455883 | Marriage & Family Therapist | Allendale, NJ | 2006 |
| Kimberlee Sieverts | 1629704010 | Social Worker | Salt Lake City, UT | 2022 |
| Victoria Sieverts, CCC,SLP | 1689981318 | Speech-Language Pathologist | Lawrenceville, GA | 2010 |
| Erik Sievertsen, MD | 1134137136 | Emergency Medicine Physician | Muskegon, MI | 2006 |
| Grant Sievertsen, MD | 1134197619 | Endocrinology, Diabetes & Metabolism Physician | Hinsdale, IL | 2006 |
| Sam Sievertsen | 1346817236 | Behavior Technician | Kent, WA | 2021 |
| Aidan Sievertson, LMT | 1306483664 | Massage Therapist | Bainbridge Island, WA | 2019 |
| Whitney Sievertson | 1790598076 | Behavior Technician | Kokomo, IN | 2025 |
| Caitlyn Sievewright | 1538713490 | Clinical Social Worker | Oxford, MI | 2019 |
| Rebecca Sievewright, LSW | 1184122574 | Clinical Social Worker | Columbus, OH | 2018 |
| Rose Sievewright, DPT, PT | 1548818727 | Physical Therapist | Dorchester, MA | 2019 |
| Vanessa Sievewright, M.A., CCC-SLP | 1689807620 | Speech-Language Pathologist | Lafayette, CO | 2009 |
| Andrew Sievila, RN, PMHCNS-BC, APNP | 1932502325 | Psychiatric/Mental Health Nurse Practitioner | West Allis, WI | 2014 |
| Dina Sieving | 1649783853 | Physical Therapy Assistant | Saint Peters, MO | 2017 |
| Lucas Sieving | 1770386104 | Student in an Organized Health Care Education/Training Program | Green Bay, WI | 2025 |
| Paul Sieving, MD | 1275175788 | Retina Specialist (Ophthalmology) Physician | Sacramento, CA | 2019 |
| Richard Sieving, MD | 1578560686 | Cardiovascular Disease Physician | The Villages, FL | 2005 |
| Elizabeth Sievwright | 1013237213 | Clinical Social Worker | Louisville, KY | 2010 |
| Kathleen Sievwright, RPH, BCPS | 1083712855 | Pharmacist | Minneapolis, MN | 2006 |
| Catherine Siew, DO | 1992333496 | Neonatal-Perinatal Medicine Physician | Ann Arbor, MI | 2020 |
| Cynthia Siew, RD | 1114371689 | Registered Dietitian | Hartford, CT | 2016 |
| Darrick Siew, M.D. | 1497835847 | Pediatrics Physician | Waynesboro, MS | 2006 |
| David Siew, MD | 1225080211 | Internal Medicine Physician | Kirkland, WA | 2006 |
| Diana Siew | 1649636820 | Marriage & Family Therapist | Los Angeles, CA | 2016 |
| Edward Siew, MD | 1043226293 | Nephrology Physician | Nashville, TN | 2006 |
| Isaac Siew, MD | 1124260732 | Emergency Medicine Physician | Rochester, NY | 2009 |
| Khy Ee Siew | 1780285320 | Registered Dietitian | Great Neck, NY | 2020 |
| Kuan Yen Siew, MS, RDN | 1316664188 | Registered Dietitian | San Jose, CA | 2022 |
| Lawrence Siew, M.D. | 1891933727 | Pediatric Emergency Medicine (Pediatrics) Physician | New Haven, CT | 2009 |
| Liengkong Siew, MD | 1033120472 | Obstetrics & Gynecology Physician | Elyria, OH | 2006 |
| Melissa Siew, M.D. | 1780096099 | Internal Medicine Physician | Westminster, CA | 2014 |
| Michael Siew, DDS, MD | 1164959169 | Oral and Maxillofacial Surgery (Dentist) | Seattle, WA | 2017 |
| Michael Siew, DDS | 1982794285 | General Practice Dentistry | Seattle, WA | 2006 |
| Michelle Siew, MD | 1336710656 | Student in an Organized Health Care Education/Training Program | Worcester, MA | 2021 |
| Robert Siew, M.D. | 1578539516 | Internal Medicine Physician | Pasadena, CA | 2006 |
| Ruth Siew, M.D. | 1255674479 | Pediatric Pulmonology Physician | San Francisco, CA | 2013 |
| Salina Siew, PHARM. D. | 1609237148 | Pharmacist | Pleasanton, CA | 2016 |
| Shwu Siew, M.D. | 1427178110 | Internal Medicine Physician | Worcester, MA | 2007 |
| Sook Fong Siew, LCSW | 1750527073 | Clinical Social Worker | New York, NY | 2008 |
| Stephen Siew, DDS, MD | 1710548870 | General Practice Dentistry | Fort Worth, TX | 2019 |
| Victor Siew, M.D. | 1164515003 | Geriatric Medicine (Internal Medicine) Physician | Fountain Valley, CA | 2006 |
| Courtney Siewak, LCPC | 1346947033 | Professional Counselor | Bolingbrook, IL | 2023 |
| Shelli Siewak, COTA | 1669152062 | Occupational Therapy Assistant | Bradenton, FL | 2023 |
| Christina Siewe, FNP-BC | 1952906430 | Family Nurse Practitioner | Cumming, GA | 2020 |
| Daku Siewe, MD | 1346668191 | Diagnostic Radiology Physician | Buffalo, NY | 2014 |
| Eric Siewe | 1043570534 | Home Health Aide | Upper Marlboro, MD | 2012 |
| Glenna Siewe | 1376439430 | Behavior Technician | Greenbelt, MD | 2025 |
| Marianne Siewe, D.D.S., M.S. | 1528226560 | Orthodontics and Dentofacial Orthopedics Dentistry | Silver Spring, MD | 2008 |
| Mary Siewe | 1114477957 | Home Health Aide | Laurel, MD | 2016 |
| Olivier Siewe | 1285284547 | Professional Counselor | New Orleans, LA | 2019 |
| Rachel Siewe | 1982488136 | Home Health Aide | Washington, DC | 2023 |
| Savinien Siewe, PMHNP - BC | 1124719380 | Psychiatric/Mental Health Nurse Practitioner | Killeen, TX | 2023 |
| Anais Louise Siewe Deuga | 1184591810 | Interpreter | Wylie, TX | 2025 |
| Symplice Siewe Djine | 1801645247 | Behavior Technician | Rockville, MD | 2024 |
| Jacques Vanel Siewe Mbouwe | 1346744141 | Home Health Aide | Washington, DC | 2018 |
| Amy Sieweke, APRN | 1104866276 | Family Nurse Practitioner | Ashland, KY | 2006 |
| John Sieweke, D.D.S. | 1205938826 | General Practice Dentistry | Zebulon, GA | 2006 |
| Susan Sieweke, CO | 1013927151 | Addiction (Substance Use Disorder) Counselor | Birmingham, AL | 2006 |
| Heather Siewell, MS | 1811715030 | Mental Health Counselor | Medford, OR | 2024 |
| Nicholas Siewell, ASW | 1235542861 | Clinical Social Worker | Bakersfield, CA | 2014 |
| Amanda Siewers, RN | 1386437077 | Emergency Registered Nurse | Vincennes, IN | 2025 |
| Anna Siewers, M.ED., LPC, NCC | 1871362673 | Professional Counselor | Chicago, IL | 2023 |
| Chad Siewers, DO | 1316487903 | Emergency Medicine Physician | San Antonio, TX | 2017 |
| Christiane Siewers, M.D. | 1023487568 | Child & Adolescent Psychiatry Physician | Pittsburgh, PA | 2015 |
| Kevin Siewers, NP | 1215056221 | Psychiatric/Mental Health Nurse Practitioner | Denville, NJ | 2007 |
| Stephanie Siewers, RPH | 1598757023 | Pharmacist | Vincennes, IN | 2005 |
| Ali Siewert, PSY.D. | 1265138994 | Clinical Psychologist | Ann Arbor, MI | 2023 |
| Annette Siewert, M.D. | 1376716647 | Obstetrics & Gynecology Physician | Sioux Falls, SD | 2008 |
| Antonette Siewert, RN | 1730482142 | Registered Nurse | Rhinelander, WI | 2010 |
| Bettina Siewert, MD | 1831378553 | Diagnostic Radiology Physician | Boston, MA | 2007 |
| Christina Siewert, LPC | 1841902368 | Professional Counselor | Allentown, PA | 2022 |
| Claudia Siewert | 1518536481 | Professional Counselor | Ann Arbor, MI | 2021 |
| Darla Siewert, DPT | 1114994407 | Physical Therapist | Ashland, VA | 2006 |
| David Siewert, DDS | 1194830786 | Dentist | Stevensville, MI | 2006 |
| Elizabeth Siewert, MS CCC-SLP | 1184859977 | Speech-Language Pathologist | Philadelphia, PA | 2009 |
| Emily Siewert | 1205488368 | Behavior Technician | Lehigh Acres, FL | 2019 |
| Ericka Siewert, BS, RDH, EPDH | 1871488890 | Dental Hygienist | Tigard, OR | 2025 |
| Holly Siewert, RN, BSN | 1902415144 | Registered Nurse | Bad Axe, MI | 2020 |
| Jeanine Siewert, MSW, LCSW | 1477783629 | Social Worker | Springfield, MO | 2009 |
| Jeffrey Siewert, NP-C | 1932513678 | Nurse Practitioner | Rochester, MN | 2014 |
| Jessalyn Siewert, CNP | 1689143018 | Pediatric Nurse Practitioner | Minneapolis, MN | 2018 |
| Jessica Siewert, RD CDE | 1093872178 | Registered Dietitian | Sterling Heights, MI | 2007 |
| Jessica Siewert, CHW II | 1922634880 | Community Health Worker | Las Vegas, NV | 2020 |
| Jordan Siewert, DO | 1730594359 | Family Medicine Physician | Toledo, OH | 2014 |
| Joshua Siewert, MD,MBA | 1003346255 | Internal Medicine Physician | Boston, MA | 2017 |
| Joshua Siewert, RBT | 1649912684 | Behavior Analyst | Seattle, WA | 2022 |
| Julaine Siewert, PH.D. | 1750404620 | Psychologist | Milwaukee, WI | 2007 |
| Kaitlin Siewert | 1548631187 | Advanced Practice Dental Therapist | Hawley, MN | 2015 |
| Kassidy Siewert, M.A.,CF-SLP | 1619520509 | Speech-Language Pathologist | Indianapolis, IN | 2019 |
| Kathleen Siewert, M.A., CCC-SLP | 1205185592 | Speech-Language Pathologist | Vancouver, WA | 2012 |
| Kaylee Siewert | 1992483457 | Occupational Therapist | New London, WI | 2023 |
| Kenneth Siewert, LCSW | 1083416242 | Clinical Social Worker | Salem, OR | 2025 |
| Kimberly Siewert | 1902773518 | Doula | Tulsa, OK | 2025 |
| Kirsten Siewert, LMFT | 1487392700 | Marriage & Family Therapist | Tiburon, CA | 2022 |
| Krista Siewert, D.P.T | 1538444062 | Physical Therapist | Maple Grove, MN | 2011 |
| Kristen Siewert, RN | 1205218989 | Case Management Registered Nurse | Golden Valley, MN | 2015 |
| Kyle Siewert, M.D. | 1336349141 | Orthopaedic Surgery Physician | New Castle, IN | 2007 |
| Lauren Siewert | 1033860184 | Occupational Therapist | Wexford, PA | 2022 |
| Lauren Siewert, PA-C | 1518444827 | Physician Assistant | Evans, CO | 2018 |
| Lisa Siewert, LCGC | 1649101254 | Genetic Counselor (M.S.) | Monrovia, CA | 2026 |
| Lisa Kimberly Siewert, PAC | 1467540815 | Physician Assistant | St Petersburg, FL | 2006 |
| Lu Siewert | 1629929260 | Personal Care Attendant | Las Vegas, NV | 2026 |
| Lukas Siewert, CHW-C | 1952288185 | Community Health Worker | Benton Harbor, MI | 2025 |
| Lynda Siewert, MD | 1225087893 | Family Medicine Physician | Cottage Grove, WI | 2006 |
| Lynette Siewert, PAC | 1942313374 | Physician Assistant | Spearfish, SD | 2006 |
| Madeleine Siewert | 1295330348 | Behavior Technician | San Bruno, CA | 2020 |
| Madison Siewert, CCC-SLP | 1386211704 | Speech-Language Pathologist | Fargo, ND | 2021 |
| Maria Siewert | 1639321003 | Day Training/Habilitation Specialist | Fresno, CA | 2008 |
| Mark Siewert, PT | 1114982733 | Physical Therapist | Minneapolis, MN | 2006 |
| Mary Siewert, FNP | 1942210737 | Occupational Health Nurse Practitioner | Bozeman, MT | 2006 |
| Matthew Siewert | 1992251045 | Physical Therapist | Edina, MN | 2016 |
| Melissa Siewert, COTA/L | 1063274421 | Occupational Therapy Assistant | Palmer, AK | 2024 |
| Mikael Siewert, P.A. | 1366538647 | Physician Assistant | San Francisco, CA | 2006 |
| Mira Siewert | 1144998139 | Case Manager/Care Coordinator | East Hampton, CT | 2021 |
| Morgan Siewert | 1578397246 | Physical Therapist | Austin, TX | 2024 |
| Nicholas Siewert, DPT | 1336300011 | Physical Therapist | Salem, OR | 2008 |
| Nicole Siewert | 1881350866 | Case Manager/Care Coordinator | Defiance, OH | 2021 |
| Rebecca Siewert, PHARMD, RPH | 1952682577 | Pharmacist | Orlando, FL | 2011 |
| Ricky Siewert, D.O | 1366402125 | Family Medicine Physician | Perryton, TX | 2006 |
| Ryan Siewert, MD | 1528355500 | Family Medicine Physician | Williston, ND | 2011 |
| Shawna Siewert, LCSW | 1629449277 | Clinical Social Worker | Fargo, ND | 2015 |
| Steven Siewert, MD | 1861442931 | Family Medicine Physician | Cottage Grove, WI | 2006 |
| Tahnee Siewert | 1013265966 | Gerontology Nurse Practitioner | Manitowoc, WI | 2012 |
| Thais Siewert, PMHNP | 1194348318 | Psychiatric/Mental Health Nurse Practitioner | La Jolla, CA | 2020 |
| Thomas Siewert, D.D.S. | 1831357862 | General Practice Dentistry | South Elgin, IL | 2008 |
| Alan Siewertsen, R.D. | 1598735359 | Registered Dietitian | Jacksonville, FL | 2006 |
| Caitlin Siewertsen, PA-C | 1871082453 | Physician Assistant | Baltimore, MD | 2018 |
| Dana Siewertsen | 1457721276 | Addiction (Substance Use Disorder) Counselor | Cincinnati, OH | 2015 |
| Frederik Siewertsz Van Reesema, LLMSW | 1871063636 | Clinical Social Worker | Ann Arbor, MI | 2018 |
| Lauren Siewertsz Van Reesema, MD | 1073073771 | Obstetrics & Gynecology Physician | Norfolk, VA | 2019 |
| Della Sieweyumptewa, CNA | 1629394978 | Nurse's Aide | Polacca, AZ | 2010 |
| Jeffrey Siewicki, PHARMD | 1386925097 | Pharmacist | Charleston, SC | 2011 |
| Sarah Siewing, DPT | 1407300684 | Physical Therapist | Butte, MT | 2016 |
| Carolyn Siewiorek | 1871126037 | Occupational Therapist | Solana Beach, CA | 2020 |
| Sarah Siewnarine | 1144730482 | Specialist | Forest Hills, NY | 2017 |
| Gregory Siewny, MD | 1891791216 | Obstetrics & Gynecology Physician | Franklin, OH | 2005 |
| Lauren Siewny | 1497198287 | Emergency Medicine Physician | Durham, NC | 2013 |
| Kindra Siewood, SLP | 1912549908 | Speech-Language Pathologist | Montgomery, TX | 2019 |
| Laura Siewruk, M.S., C.C.C. SLP | 1770614976 | Speech-Language Pathologist | Pompano Beach, FL | 2007 |
| Abbie Siex | 1396306247 | Behavior Analyst | Salt Lake City, UT | 2019 |
| Dayne Siex | 1982954772 | Mental Health Counselor | Oregon City, OR | 2012 |
| Neal Siex, D.O. | 1871555912 | Anesthesiology Physician | Tulsa, OK | 2006 |
| Parker Siex | 1982374534 | Student in an Organized Health Care Education/Training Program | Tulsa, OK | 2021 |
| Anne Marie Sieyou, LPN | 1033414511 | Licensed Practical Nurse | Bronx, NY | 2011 |
| Amy Siez | 1942654017 | Case Manager/Care Coordinator | Chula Vista, CA | 2016 |
| Regina Siez, L.C.S.W. | 1245672997 | Clinical Social Worker | Lake Elsinore, CA | 2013 |
| Carlos Siezar | 1790109619 | Mental Health Counselor | Colton, CA | 2014 |
| Rochelle Siezega, PA | 1710292982 | Medical Physician Assistant | Buffalo, NY | 2010 |
| Rebecca Sifa | 1902679434 | Mental Health Counselor | Columbus, OH | 2023 |
| Muhtasham Sifaat, DO | 1558299735 | Family Medicine Physician | Monroe, MI | 2026 |
| Fars Sifaf | 1114884640 | Behavior Technician | Riverbank, CA | 2026 |
| Alfred Sifagaloa | 1558004085 | Personal Care Attendant | Las Vegas, NV | 2022 |
| Naana A.a. Sifah | 1528848108 | Behavior Technician | Farmington Hills, MI | 2023 |
| Andrew Sifain, M.D. | 1821311986 | Anesthesiology Physician | Nashville, TN | 2010 |
| Claudine Sifain, RPA-C | 1811932221 | Medical Physician Assistant | Rochester, NY | 2006 |
| George Sifain, D.M.D. | 1265774947 | General Practice Dentistry | East Amherst, NY | 2013 |
| Maggie Sifain, MD | 1336212588 | Pediatric Pulmonology Physician | Orlando, FL | 2006 |
| Mary Sifain, DO | 1013474188 | Nephrology Physician | Boca Raton, FL | 2019 |
| Michelle Sifain, PA | 1376639856 | Physician Assistant | Rochester, NY | 2006 |
| Shanley Sifain, MD | 1427357938 | Neonatal-Perinatal Medicine Physician | Buffalo, NY | 2011 |
| Demetra Sifakis, DDS | 1689883548 | Dentist | Madison, WI | 2007 |
| Jessica Sifakis, PHARMD | 1285915637 | Pharmacist | Jacksonville, FL | 2011 |
| Mutsai Sifana-Mhere, OTR | 1871703116 | Occupational Therapist | Topeka, KS | 2007 |
| Chakise Sife | 1700712718 | Behavior Technician | Rockville, MD | 2026 |
| Lena Sifen, MD, PA-C | 1902178577 | Student in an Organized Health Care Education/Training Program | Memphis, TN | 2012 |
| Alyssa Sifer, PT | 1255857140 | Physical Therapist | Newark, DE | 2017 |
| Hewan Sifer | 1548141112 | Behavior Technician | Pikesville, MD | 2025 |
| Andrea Siferd | 1831970854 | Mental Health Counselor | Tigard, OR | 2023 |
| Melissa Siferd | 1851798540 | Speech-Language Pathologist | Mount Vernon, OH | 2014 |
| Felicia Sifers, M.D. | 1760861645 | Pediatrics Physician | Birmingham, AL | 2015 |
| Georgia Sifers | 1225973720 | Personal Care Attendant | Meadow Bridge, WV | 2026 |
| Jacob Sifers, DO | 1316688575 | Family Medicine Physician | Morehead, KY | 2022 |
| Jennifer Sifers, CCC-SLP | 1275182685 | Speech-Language Pathologist | Spring, TX | 2019 |
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).