Providers Rick Siel, MD to Sierra Siemers, RDN
300 individual NPIs in the federal registry, part 20,176 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. 94 link to a page of their own with Medicare and CMS data the registry does not carry.
| Provider | NPI | Specialty | Practice city | NPI issued |
|---|---|---|---|---|
| Rick Siel, MD | 1356737126 | Anesthesiology Physician | Springfield, OR | 2015 |
| Gary Siela, LMFT | 1538375159 | Marriage & Family Therapist | Windsor, CA | 2007 |
| Kaitlin Siela | 1245702091 | Pharmacist | Chicago, IL | 2018 |
| Alan Sielaff, M.D. | 1679837801 | Emergency Medicine Physician | Ann Arbor, MI | 2012 |
| Amy Sielaff, FNP-C | 1700613270 | Women's Health Nurse Practitioner | Iron Mountain, MI | 2024 |
| Carolynn Sielaff, APNP | 1013755784 | Family Nurse Practitioner | Milwaukee, WI | 2024 |
| Don Sielaff, M.D. | 1144320839 | Obstetrics & Gynecology Physician | Lincoln, IL | 2006 |
| Emily Sielaff, MA,APCC | 1902751969 | Mental Health Counselor | Simi Valley, CA | 2026 |
| Heather Sielaff, M.D. | 1295907418 | Pediatrics Physician | St Francis, WI | 2008 |
| Jacqueline Sielaff | 1083455430 | Nurse Practitioner | Crestwood, IL | 2024 |
| Jenna Sielaff, LLMFT | 1306270590 | Marriage & Family Therapist | Highland, MI | 2013 |
| Jennifer Sielaff | 1508194945 | Addiction (Substance Use Disorder) Counselor | Casa Grande, AZ | 2009 |
| Jessica Sielaff, PHARMD | 1609746551 | Oncology Pharmacist | Detroit, MI | 2025 |
| Katia Sielaff | 1376234476 | Behavior Technician | Scottsdale, AZ | 2023 |
| Mattea Sielaff | 1720910326 | Student in an Organized Health Care Education/Training Program | Philadelphia, PA | 2026 |
| Michelle Sielaff, PHARMD | 1902182413 | Pharmacist | Nashville, TN | 2011 |
| Renee Sielaff, MS., CF-SLP | 1992379317 | Speech-Language Pathologist | Lawton, OK | 2021 |
| Robin Sielaff, ND | 1437429537 | Naturopath | Beaverton, OR | 2012 |
| Sierra Sielaff, MD | 1841930385 | Student in an Organized Health Care Education/Training Program | Wilmington, NC | 2022 |
| Stephanie Sielaff, DPT | 1649713488 | Physical Therapist | Tucson, AZ | 2016 |
| Timothy Sielaff, MD PHD | 1922060177 | Surgery Physician | Minneapolis, MN | 2006 |
| Nancy Sieland, LICSW, M.ED | 1932251907 | Clinical Social Worker | Marblehead, MA | 2007 |
| Lionel Sielatchom Noubissie, PHARMD | 1528702198 | Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist | New Haven, CT | 2022 |
| Florence Sielatycki | 1851836266 | Pharmacist | Portland, OR | 2016 |
| John Sielatycki, M.D. | 1629335658 | Orthopaedic Surgery of the Spine Physician | Steamboat Springs, CO | 2012 |
| Jessica Sielawa, DC | 1891836565 | Chiropractor | Syracuse, NY | 2007 |
| Laura Sielbeck, MS/CCC-SLP | 1245741966 | Speech-Language Pathologist | Metropolis, IL | 2017 |
| Kathryn Sielbeck-Bowen, PHD CRNP | 1639267818 | Pediatric Registered Nurse | Sayre, PA | 2006 |
| Dale Sielczak | 1588926513 | Behavior Analyst | Las Vegas, NV | 2012 |
| Briana Siele | 1952058497 | Case Manager/Care Coordinator | Smithtown, NY | 2022 |
| Daniel Siele, MD | 1114243730 | Student in an Organized Health Care Education/Training Program | Memphis, TN | 2010 |
| Stephan Siele, DC | 1831775733 | Nutrition Chiropractor | Ketchum, ID | 2021 |
| Jane Sieleman, PNP | 1750360228 | Pediatric Nurse Practitioner | Waterloo, IA | 2006 |
| Emily Sielen, CHI-SPANISH | 1669113486 | Interpreter | Bellingham, WA | 2022 |
| Bruce Sieleni, M.D. | 1609217710 | Psychiatry Physician | Coralville, IA | 2013 |
| Beth Sieler, PHARM.D. | 1083688329 | Pharmacist | Eagle Butte, SD | 2006 |
| Brandon Sieler, RN | 1679294896 | Registered Nurse | Anchorage, AK | 2022 |
| Heather Sieler, PT | 1679018592 | Physical Therapist | Fort Collins, CO | 2017 |
| Megan Sieler, OTRL | 1982896270 | Occupational Therapist | Bloomington, MN | 2007 |
| Nathan Sieler, PT | 1427645621 | Physical Therapist | Fremont, NE | 2020 |
| Sarah Sieler, RDH | 1215727862 | Dental Hygienist | Payson, AZ | 2025 |
| Shawn Sieler, M.D. | 1457446916 | Sports Medicine (Orthopaedic Surgery) Physician | North Brunswick, NJ | 2006 |
| Doreen Sielert, LCSW | 1952030207 | Clinical Social Worker | Santa Rosa, CA | 2022 |
| Shawna Sielert, LCPC, LMAC, LPC | 1851646202 | Professional Counselor | Blue Springs, MO | 2012 |
| Miriam Sieletsion | 1588309694 | Behavior Technician | Farmington Hills, MI | 2022 |
| Paige Sielfleisch | 1508341322 | Case Manager/Care Coordinator | Arnold, MO | 2018 |
| Tara Sielfleisch | 1558144261 | Occupational Therapy Assistant | Saint Louis, MO | 2023 |
| Hailee Sieli, RBT | 1548109952 | Behavior Technician | Newnan, GA | 2026 |
| Kimberly Sieli, M.D. | 1104987544 | Pediatrics Physician | Cottleville, MO | 2006 |
| Ryan Sieli, MD | 1336636901 | Emergency Medicine Physician | Brooklyn, NY | 2018 |
| Truly Sieli | 1639870744 | Behavior Technician | Deerfield Beach, FL | 2023 |
| Allison Sielicki, PHARMD | 1093348831 | Pharmacist | Eagle River, WI | 2020 |
| Ann Sielicki, D.D.S. | 1215998299 | Dentist | Scottsdale, AZ | 2006 |
| Anthony Sielicki, MD | 1619339520 | Emergency Medicine Physician | Philadelphia, PA | 2016 |
| Hilda Sielicki, R.N., N.P. | 1831403898 | Family Nurse Practitioner | Modesto, CA | 2010 |
| Nancy Sielicki, MA PSYCHOLOGY LMHC | 1689890584 | Mental Health Counselor | Bellingham, WA | 2007 |
| Shelly Sieligowski, LSW | 1205675774 | Clinical Social Worker | Colorado Springs, CO | 2024 |
| Amy Sieling, LSW | 1275866709 | Clinical Social Worker | Fargo, ND | 2009 |
| Beth Sieling, MD | 1134145808 | Surgery Physician | Southbury, CT | 2006 |
| Chloe Sieling, DNP, APRN, FNP-C | 1982594677 | Family Nurse Practitioner | Stillwater, MN | 2025 |
| Dajah Sieling | 1790432276 | Behavior Technician | Fort Worth, TX | 2022 |
| Jessica Sieling | 1962757120 | Emergency Medicine Physician | Corpus Christi, TX | 2012 |
| Julie Sieling, NP-C | 1568766764 | Family Nurse Practitioner | Bourbonnais, IL | 2011 |
| Keith Sieling, PHARMD | 1164143582 | Pharmacist | St Louis Park, MN | 2022 |
| Michael Sieling, MD | 1235127416 | Anesthesiology Physician | Webster, TX | 2005 |
| William Sieling, MD | 1659125615 | Student in an Organized Health Care Education/Training Program | Minneapolis, MN | 2024 |
| Morryne Sielinou | 1790021210 | Home Health Aide | Hyattsville, MD | 2013 |
| Megan Sielken | 1427247022 | Mental Health Counselor | Orange, MA | 2007 |
| Kevin Sielky, MSW | 1285875948 | Clinical Social Worker | Cerritos, CA | 2009 |
| Richard Sieller, PT | 1518393099 | Physical Therapist | Gloucester, VA | 2013 |
| Alexandria Sieloff, DPM | 1831829795 | Podiatrist | Miami, FL | 2022 |
| Andrea Sieloff, LPC | 1962286542 | Mental Health Counselor | Green Bay, WI | 2023 |
| Eliot Sieloff, MD | 1538261797 | Surgery Physician | Tallahassee, FL | 2006 |
| Eric Sieloff, MD | 1831627322 | Gastroenterology Physician | Kalamazoo, MI | 2017 |
| Kelly Sieloff | 1023726924 | Behavior Technician | Dearborn, MI | 2022 |
| Kurt Sieloff, MD | 1700222650 | Neurology Physician | Ann Arbor, MI | 2013 |
| Madison Sieloff | 1477278430 | Behavior Technician | Farmington Hills, MI | 2022 |
| Matthew Sieloff | 1902369952 | Podiatrist | La Crosse, WI | 2019 |
| Miles Sieloff, PHARM.D. | 1497003123 | Pharmacist | Hopkins, MN | 2012 |
| Rebekah Sieloff | 1649004177 | Counselor | Hood River, OR | 2024 |
| Edith Sielsch, C.R.N.P. | 1922007228 | Nurse Practitioner | York, PA | 2005 |
| Anne Sielschott, APRN.CNP | 1104478098 | Family Nurse Practitioner | Lima, OH | 2019 |
| Elizabeth Sielschott | 1780572081 | Medical-Surgical Registered Nurse | San Antonio, TX | 2025 |
| Sharon Sielschott, LPC | 1760957583 | Professional Counselor | Adair Village, OR | 2018 |
| William Sielschott, PHARMACIST | 1871612663 | Pharmacist | Bloomington, IL | 2007 |
| Amber Sielski | 1508297326 | Physician Assistant | Oneida, NY | 2013 |
| Chester Sielski, DDS | 1497947196 | Dentist | Buffalo, NY | 2007 |
| Christopher Sielski | 1609511237 | Student in an Organized Health Care Education/Training Program | Bethlehem, PA | 2022 |
| Dustin Sielski, MD | 1497379937 | Physical Medicine & Rehabilitation Physician | Royal Oak, MI | 2020 |
| Ireneusz Sielski, MA | 1073755369 | Mental Health Counselor | New Britain, CT | 2009 |
| James Sielski, DO | 1124001375 | Family Medicine Physician | St Johns, AZ | 2005 |
| Jennifer Sielski, LPC | 1063772648 | Professional Counselor | Manistee, MI | 2012 |
| Jennifer Sielski, DMD | 1831485010 | Pediatric Dentistry | North Charleston, SC | 2011 |
| John Sielski | 1134133291 | Pharmacist | Batavia, NY | 2006 |
| Lauren Sielski | 1124761895 | Student in an Organized Health Care Education/Training Program | New York, NY | 2022 |
| Lester Sielski, M.D | 1669424081 | Internal Medicine Physician | Amherst, NY | 2006 |
| Lori Sielski, MD | 1639259070 | Pediatrics Physician | Houston, TX | 2006 |
| Luiza Sielski | 1548987126 | Nurse Practitioner | Park Ridge, IL | 2022 |
| Maciej Sielski, DDS | 1598044554 | General Practice Dentistry | Fontana, CA | 2011 |
| Madison Sielski, AMFT | 1891300943 | Marriage & Family Therapist | Tustin, CA | 2020 |
| Mark Sielski, D.C. | 1538209440 | Sports Physician Chiropractor | North Plainfield, NJ | 2007 |
| Neil Sielski, MD | 1598320665 | Neurology Physician | New York, NY | 2019 |
| Richard Sielski, M.D, | 1023080298 | Family Medicine Physician | Lancaster, OH | 2006 |
| Sandra Sielski, RN | 1407024094 | Registered Nurse | Manistee, MI | 2008 |
| Victoria Sielski | 1720979693 | Behavior Technician | Chicago, IL | 2025 |
| Anastasia Sielski Elizalde, LMSW | 1982427548 | Clinical Social Worker | New York, NY | 2024 |
| Nicole Sielsky | 1538973300 | Mental Health Counselor | Altamonte Springs, FL | 2025 |
| Carol Siem, MS, CCC-SLP | 1548551773 | Speech-Language Pathologist | Los Angeles, CA | 2011 |
| Henry Siem, M.D. | 1457797995 | Family Medicine Physician | Colorado Springs, CO | 2013 |
| Jessica Siem, LPN | 1649672718 | Licensed Practical Nurse | Renton, WA | 2014 |
| Kwie-Hoa Siem, M.D. | 1740271931 | Pulmonary Disease Physician | Elmendorf Afb, AK | 2005 |
| Michael Siem, PA-C | 1245483569 | Physician Assistant | Bellevue, WA | 2008 |
| Michael Siem | 1275364630 | Independent Duty Corpsman | San Diego, CA | 2024 |
| Ruth Siem, PA-C | 1023080967 | Physician Assistant | Sioux Falls, SD | 2006 |
| Salinna Siem | 1114891702 | Behavior Technician | Everett, WA | 2025 |
| Viseth Siem, PHARMD | 1750790812 | Pharmacist | Stockton, CA | 2014 |
| Fulufhelo Siema | 1699620989 | Behavior Technician | Colorado Springs, CO | 2026 |
| Emerique Gildas Siemadji | 1588552574 | Behavior Technician | Rockville, MD | 2025 |
| Cindy Sieman | 1174050041 | Student in an Organized Health Care Education/Training Program | Culver City, CA | 2017 |
| Rachel Sieman | 1689855876 | Midwife | Boardman, OH | 2007 |
| Robert Sieman, D.M.D. | 1922134063 | Endodontics | Berkeley Heights, NJ | 2007 |
| David Siemann, DO | 1417693441 | Family Medicine Physician | Aiea, HI | 2022 |
| Edie Siemann, LMFT & LMHC | 1518403807 | Marriage & Family Therapist | Gainesville, FL | 2017 |
| Jennifer Siemann, LCSW | 1962232777 | Clinical Social Worker | Mineola, NY | 2024 |
| Patricia Siemann, MA, L/CCC-SLP | 1245773894 | Speech-Language Pathologist | Overland Park, KS | 2016 |
| Samantha Siemann | 1558077933 | Certified Registered Nurse Anesthetist | Spokane, WA | 2023 |
| Thomas Siemann, DAOM, L.AC. | 1750785234 | Acupuncturist | Kensington, CA | 2014 |
| Amy Siemanowicz, APRN | 1285324889 | Family Medicine Physician | Manchester, NH | 2023 |
| Benjamin Siemanowski, M.D. | 1548301120 | Gastroenterology Physician | Bellingham, WA | 2007 |
| Mackenzie Siemans, ATC | 1063878700 | Athletic Trainer | Kailua, HI | 2016 |
| Lorelei Siemasz, LLMSW | 1508472358 | Social Worker | Center Line, MI | 2020 |
| Elizabeth Siematkowski, LMHC | 1457706277 | Mental Health Counselor | Buffalo, NY | 2016 |
| Katherine Siembab | 1598485377 | Clinical Social Worker | Peru, IL | 2022 |
| Adam Siembida | 1912622432 | Pharmacist | Lehigh Acres, FL | 2022 |
| Filip Siembida, MD | 1881375574 | Internal Medicine Physician | Philadelphia, PA | 2023 |
| Jagoda Siembida, MD | 1518428507 | Psychiatry Physician | Saint Louis, MO | 2019 |
| Jagoda Siembida | 1730572751 | Physical Therapy Assistant | Miami, FL | 2015 |
| Jakub Siembida, MD | 1982125159 | Diagnostic Radiology Physician | Madison, WI | 2017 |
| Kristy Siembida | 1801512561 | Nutritionist | Seneca, PA | 2022 |
| Joshua Siembieda, M.D. | 1225322357 | Pediatrics Physician | Torrance, CA | 2011 |
| Leslie Siembieda, LCSW | 1447335286 | Clinical Social Worker | Arroyo Grande, CA | 2006 |
| Linda Siembieda, P.T. | 1356651970 | Physical Therapist | Huntington Beach, CA | 2010 |
| Anna Siembor, MSW, LICSW | 1023587938 | Clinical Social Worker | Easthampton, MA | 2018 |
| Brian Siembor, PH.D. | 1447627195 | Clinical Psychologist | Boston, MA | 2015 |
| Jordan Siembor, PHARMD | 1306594585 | Ambulatory Care Pharmacist | New Haven, CT | 2022 |
| Michael Siembor | 1841502945 | Student in an Organized Health Care Education/Training Program | Kingston, NY | 2010 |
| Teresa Siembora, CRNP | 1699067116 | Psychiatric/Mental Health Nurse Practitioner | Bala Cynwyd, PA | 2011 |
| Ellen Siemborski, FNP-BC | 1740575471 | Family Nurse Practitioner | Cleveland, OH | 2011 |
| Laura Sieme-Giordano, LICSW | 1093725319 | Social Worker | Saratoga Springs, NY | 2006 |
| Roxanne Siemeck, APRN, CNS-BC, FNP-BC | 1972774560 | Clinical Nurse Specialist | Oak Lawn, IL | 2008 |
| Danuta Siemek, LCDC | 1578986113 | Addiction (Substance Use Disorder) Counselor | San Antonio, TX | 2014 |
| Heather Siemek | 1679372577 | Day Training/Habilitation Specialist | Columbus, NE | 2025 |
| Katie Siemek | 1205632387 | Adult Companion | Omaha, NE | 2025 |
| Konrad Siemek, PT | 1043999550 | Orthopedic Physical Therapist | Springdale, AR | 2023 |
| Mary Siemek, RD, CDE | 1275663882 | Registered Dietitian | Neenah, WI | 2007 |
| Natosha Siemek | 1447672514 | Physical Therapist | Louisville, NE | 2014 |
| Peggy Siemek-Asche, LMHP, LADC, LCSW | 1487828208 | Clinical Social Worker | Omaha, NE | 2008 |
| Danielle Siemen, DPT | 1487353454 | Physical Therapist | Cheboygan, MI | 2023 |
| Douglas Siemen, PTA | 1871968024 | Physical Therapy Assistant | West Liberty, IA | 2015 |
| James Siemen, PHD | 1821276320 | Psychologist | Chestertown, MD | 2008 |
| Jamie Siemen | 1598029126 | Social Worker | Sandusky, MI | 2012 |
| Kevin Siemen | 1477105997 | Physician Assistant | Adrian, MI | 2019 |
| Kyle Siemen, DMD | 1952311078 | General Practice Dentistry | Pocatello, ID | 2006 |
| Natalie Siemen, R.N. | 1013055185 | Registered Nurse | Worcester, MA | 2007 |
| Scott Siemen, D.M.D | 1316093354 | General Practice Dentistry | Paxton, MA | 2007 |
| Alexandra Siemens, CPNP-PC | 1831015221 | Pediatric Nurse Practitioner | Kansas City, MO | 2026 |
| Andrea Siemens, LCSW | 1366900086 | Clinical Social Worker | Tucson, AZ | 2019 |
| Andrew Siemens, MD | 1891445946 | Student in an Organized Health Care Education/Training Program | Boston, MA | 2022 |
| Annette Siemens, FNP | 1477643872 | Nurse Practitioner | Denver, CO | 2006 |
| Brent Siemens, DC | 1275596025 | Chiropractor | Bethany, OK | 2006 |
| Christopher Siemens, MD | 1972598241 | Otolaryngology Physician | Tulsa, OK | 2005 |
| Cindy Siemens, MFT | 1508887001 | Marriage & Family Therapist | McKinleyville, CA | 2006 |
| Dale Siemens, RN | 1194844373 | Adult Psychiatric/Mental Health Registered Nurse | Bakersfield, CA | 2007 |
| Deborah Siemens, PT | 1922472539 | Physical Therapist | Asheville, NC | 2015 |
| Elizabeth Siemens, LMT | 1275672891 | Specialist | Eugene, OR | 2007 |
| Gerald Siemens, MD | 1447505045 | Anesthesiology Physician | Missoula, MT | 2012 |
| James Siemens, D.D.S. | 1457410839 | General Practice Dentistry | Port Angeles, WA | 2006 |
| Jennifer Siemens | 1366867509 | Massage Therapist | Eureka, MT | 2014 |
| Joanna Siemens, LPC | 1710499777 | Professional Counselor | Coeur D Alene, ID | 2017 |
| John Siemens, M.F.T. | 1720151822 | Marriage & Family Therapist | Atascadero, CA | 2006 |
| Johnathan Siemens | 1760361620 | Mental Health Counselor | Steubenville, OH | 2025 |
| Juanita Siemens | 1265144166 | Addiction (Substance Use Disorder) Counselor | Kaysville, UT | 2022 |
| Katherine Siemens, RN | 1447994900 | Community Health Registered Nurse | Metairie, LA | 2022 |
| Kathryn Siemens, D.D.S. | 1376717140 | General Practice Dentistry | Fresno, CA | 2008 |
| Kelli Siemens | 1639002967 | Physical Therapist | Redmond, WA | 2026 |
| Kelly Siemens, M.D. | 1760467435 | Family Medicine Physician | Davis, CA | 2005 |
| Kirby Siemens, BCBA | 1255955480 | Behavior Analyst | Beaverton, OR | 2020 |
| Kyla Siemens | 1316560469 | Physician Assistant | Boston, MA | 2020 |
| Laura Siemens, PT | 1134289549 | Physical Therapist | Los Alamitos, CA | 2006 |
| Lesley Siemens, RN | 1144320763 | Registered Nurse | St Petersburg, FL | 2006 |
| Lindsey Siemens, PA-C | 1033585401 | Physician Assistant | Minot, ND | 2015 |
| Marc Siemens, DC | 1912000571 | Chiropractor | Carmichael, CA | 2006 |
| Mark Siemens, LCSW | 1598700429 | Clinical Social Worker | Eugene, OR | 2006 |
| Mary Siemens, MA | 1922478668 | Marriage & Family Therapist | Fresno, CA | 2015 |
| Megan Siemens, SLP | 1275819393 | Speech-Language Pathologist | Quincy, IL | 2011 |
| Meshae Siemens, LPN | 1851982615 | Licensed Practical Nurse | Tulsa, OK | 2021 |
| Molly Siemens, RD | 1427205343 | Registered Dietitian | Portland, OR | 2008 |
| Nicki Siemens, SLP | 1245440924 | Speech-Language Pathologist | West Des Moines, IA | 2007 |
| Payton Siemens, SLP | 1801471099 | Speech-Language Pathologist | Newton, KS | 2021 |
| Penni Siemens, M.S., CCC-SLP | 1174164735 | Speech-Language Pathologist | Campbell, CA | 2019 |
| Rachel Siemens | 1114868635 | Speech-Language Pathologist | Rogers, AR | 2026 |
| Richard Siemens, J.D., M.D., M.P.H. | 1598898124 | Public Health & General Preventive Medicine Physician | Manchester, NH | 2007 |
| Rodger Siemens, MD | 1053499772 | Internal Medicine Physician | Sacramento, CA | 2006 |
| Roger Siemens, M.D. | 1952387847 | Surgery Physician | Tulsa, OK | 2005 |
| Rosa Siemens, RD, CDCES | 1952584880 | Registered Dietitian | Florence, AZ | 2007 |
| Samantha Siemens, MD | 1184542516 | Family Medicine Physician | Eau Claire, WI | 2026 |
| Sandra Siemens, LISW | 1013019165 | Clinical Social Worker | Bettendorf, IA | 2006 |
| Sean Siemens, PT | 1871101063 | Physical Therapist | Solana Beach, CA | 2020 |
| Taylor Siemens, NP | 1821577859 | Nurse Practitioner | Dallas, TX | 2018 |
| Tracey Siemens, LCSW, MSW | 1376745943 | Clinical Social Worker | Belton, MO | 2007 |
| Alex Siemensma | 1578303558 | Behavior Technician | San Diego, CA | 2024 |
| Aaron Siemer | 1063261683 | Personal Care Attendant | Henderson, NV | 2024 |
| Amanda Siemer, O.T. | 1386923449 | Occupational Therapist | Jackson, MO | 2011 |
| Andrew Siemer, CRNA | 1194181099 | Certified Registered Nurse Anesthetist | Cincinnati, OH | 2016 |
| Angela Siemer, M.S. | 1548677834 | Developmental Therapist | Highland, IN | 2014 |
| Ansley Siemer, PA-S | 1093608549 | Student in an Organized Health Care Education/Training Program | Midland, TX | 2025 |
| Autumn Siemer, BCBA | 1477216752 | Behavior Analyst | Florence, KY | 2021 |
| Benjamin Siemer | 1669010344 | Certified Registered Nurse Anesthetist | Cincinnati, OH | 2019 |
| Bre Siemer | 1104709559 | Behavior Technician | Junction City, KS | 2025 |
| Christopher Siemer, DO | 1104346568 | Anesthesiology Physician | Nashville, TN | 2017 |
| Dale Siemer, DDS | 1063428738 | Dentist | Cincinnati, OH | 2006 |
| Deanna Siemer, MD | 1851368153 | Family Medicine Physician | Jackson, MO | 2006 |
| Denise Siemer | 1255585352 | Counselor | Hamilton, OH | 2008 |
| Diane Siemer, OTR | 1962539023 | Pediatric Occupational Therapist | Saint Louis, MO | 2007 |
| Elizabeth Siemer, LCSW | 1083625198 | Clinical Social Worker | Skokie, IL | 2006 |
| Emily Siemer, CNM | 1639557127 | Advanced Practice Midwife | Tucson, AZ | 2015 |
| Emily Siemer, SLP | 1770862278 | Speech-Language Pathologist | Winfield, MO | 2011 |
| Hannah Siemer | 1396358495 | Registered Nurse | Yakima, WA | 2020 |
| Jacalyn Siemer, CRNFA | 1760558605 | Registered Nurse First Assistant | Sandpoint, ID | 2006 |
| Jennifer Siemer, MS, CCC/SLP | 1871627455 | Speech-Language Pathologist | Peachtree City, GA | 2007 |
| Jonalyn Siemer, OTR/L | 1013252196 | Occupational Therapist | Columbia, MO | 2012 |
| Julie Siemer | 1558212910 | Nurse Practitioner | Harrison, OH | 2026 |
| Kaitlyn Siemer, RN, BSN | 1710642780 | Behavior Technician | Santa Clara, CA | 2021 |
| Kara Siemer, PT, DPT | 1811546799 | Physical Therapist | Bryn Mawr, PA | 2019 |
| Kassidy Siemer | 1801722285 | Physical Therapist | Urbandale, IA | 2026 |
| Kevin Siemer | 1124685078 | Physical Therapy Assistant | Cincinnati, OH | 2019 |
| Kris Siemer, LMHP, LADC | 1871820522 | Mental Health Counselor | Omaha, NE | 2009 |
| Kristine Siemer, OTR/L, CHT | 1013418110 | Occupational Therapist | Traverse City, MI | 2018 |
| Lauren Siemer, MD | 1790205342 | Anesthesiology Physician | Nashville, TN | 2017 |
| Linda Siemer, LCSW-R | 1225159387 | Clinical Social Worker | Middletown, NY | 2007 |
| Linda Siemer, CNP | 1407171788 | Nurse Practitioner | Flora, IL | 2010 |
| Linda Siemer, RN, BCFNP | 1477571859 | Family Nurse Practitioner | Trenton, MO | 2006 |
| Logan Siemer, DPT | 1073048278 | Physical Therapist | Cincinnati, OH | 2017 |
| Margaret Siemer, OTR/L; CLT | 1184655490 | Hand Occupational Therapist | Lake Stevens, WA | 2006 |
| Margaret Siemer, CNP | 1427123835 | Nurse Practitioner | Greenville, OH | 2006 |
| Mark Siemer, D.O. | 1871649368 | Family Medicine Physician | Colorado Springs, CO | 2007 |
| Matthew Siemer, O.D. | 1215168141 | Optometrist | Kansas City, KS | 2009 |
| Melissa Siemer, AU.D. | 1598178279 | Audiologist | Lexington, KY | 2014 |
| Melissa Siemer, RPH | 1851922207 | Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist | Washington Court House, OH | 2020 |
| Michael Siemer, M.D. | 1134280589 | Pediatrics Physician | Saint Louis, MO | 2006 |
| Morgan Siemer, APRN | 1619502770 | Family Nurse Practitioner | Cape Girardeau, MO | 2020 |
| Phillip Siemer, MD | 1588612972 | Family Medicine Physician | Suttons Bay, MI | 2006 |
| Robin Siemer, CADC | 1306273099 | Addiction (Substance Use Disorder) Counselor | Des Moines, IA | 2013 |
| Ronald Siemer | 1528668191 | Pharmacist | Hamilton, OH | 2020 |
| Sara Siemer, CNP | 1508383431 | Acute Care Nurse Practitioner | Cincinnati, OH | 2017 |
| Sarah Siemer, DPT | 1326353731 | Physical Therapist | Saint Paul, MN | 2010 |
| Sheila Siemer, RN | 1437649597 | Registered Nurse | Oakland, CA | 2018 |
| Tamara Siemer, CNP | 1679799191 | Family Nurse Practitioner | Columbus, OH | 2007 |
| Tracy Siemer, LISW | 1306332507 | Clinical Social Worker | Mason, OH | 2018 |
| Virginia Siemer, CNM | 1548539307 | Midwife | Frederick, MD | 2011 |
| William Siemer | 1497259402 | Athletic Trainer | Liberty Twp, OH | 2018 |
| Christina Siemer-Harley, APRN | 1568831618 | Family Nurse Practitioner | Lancaster, OH | 2015 |
| Analisa Siemering, LICSW | 1114001864 | Mental Health Counselor | Quincy, MA | 2006 |
| Hannah Siemering | 1992663405 | Behavior Technician | Dayton, OH | 2026 |
| Karen Siemering, FNP | 1619134061 | Family Nurse Practitioner | Springfield, MA | 2008 |
| Kirstin Siemering, RD | 1205773645 | Registered Dietitian | Madison, WI | 2026 |
| Aleksandra Siemers, PT | 1346405719 | Orthopedic Physical Therapist | Saint Paul, MN | 2008 |
| Alissa Siemers, MSED, ATC, VATL | 1699954719 | Athletic Trainer | Newport News, VA | 2007 |
| Brandi Siemers | 1508629270 | Behavior Analyst | Jackson, MI | 2024 |
| Bridgett Siemers | 1942139852 | Mental Health Counselor | Katy, TX | 2026 |
| Catherine Siemers, LMT | 1043538788 | Massage Therapist | Gresham, OR | 2010 |
| Eric Siemers, M.D. | 1821171562 | Neurology Physician | Indianapolis, IN | 2006 |
| Erin Siemers, PSYCHOLOGIST | 1699926683 | Psychologist | Saint Louis, MO | 2008 |
| Gayle Siemers, D.D.S. | 1295884393 | General Practice Dentistry | Polson, MT | 2007 |
| Heather Siemers, RD, LMNT | 1336339761 | Registered Dietitian | Grand Island, NE | 2007 |
| Isiah Siemers | 1730750381 | Clinical Social Worker | Appleton, WI | 2021 |
| Jacqueline Siemers, P.T.A. | 1750674669 | Physical Therapy Assistant | Raleigh, NC | 2011 |
| Jessica Siemers, APRN | 1255670345 | Women's Health Nurse Practitioner | Omaha, NE | 2013 |
| John Siemers, MD | 1477781128 | Hospitalist Physician | Coeur D Alene, ID | 2009 |
| Kaye Siemers, BCBA | 1952889354 | Behavior Analyst | Largo, FL | 2018 |
| Kelsey Siemers, FNP-C | 1740751387 | Family Nurse Practitioner | Chesterfield, MO | 2018 |
| Kent Siemers, M.D. | 1033293246 | Obstetrics & Gynecology Physician | Omaha, NE | 2006 |
| Kirsten Siemers | 1275467185 | Peer Specialist | Menasha, WI | 2026 |
| Lauren Siemers, CCC-SLP/L | 1508302530 | Speech-Language Pathologist | Galesburg, IL | 2017 |
| Lauren Siemers, MSW, LICSW | 1508687377 | Clinical Social Worker | Saint Cloud, MN | 2024 |
| Logan Siemers, PT, DPT | 1245055763 | Sports Medicine (Physical Medicine & Rehabilitation) Physician | Irvine, CA | 2024 |
| Madison Siemers, BA, FEMINIST STUDIES | 1255939252 | Case Manager/Care Coordinator | San Jose, CA | 2020 |
| Maya Siemers | 1447941414 | Mental Health Counselor | Tumwater, WA | 2023 |
| Nicholas Siemers | 1801250642 | Behavior Analyst | Charleston, SC | 2016 |
| Parinaz Siemers, MD, MS | 1316528607 | Plastic Surgery Physician | Maywood, IL | 2021 |
| Paul Siemers, D.C. | 1003034356 | Rehabilitation Chiropractor | Faribault, MN | 2007 |
| Paul Siemers, MD | 1144274291 | Diagnostic Radiology Physician | Dallas, TX | 2006 |
| Peter Siemers, CRPA-P | 1407704422 | Peer Specialist | East Hampton, NY | 2026 |
| Raina Siemers | 1952296634 | Behavior Technician | Henderson, NV | 2025 |
| Rebecca Siemers, MD | 1982832093 | Family Medicine Physician | Coeur D Alene, ID | 2009 |
| Rose Siemers | 1124946769 | Behavior Technician | Walnut Creek, CA | 2026 |
| Ross Siemers, M.D. | 1184716060 | Hematology & Oncology Physician | Marquette, MI | 2006 |
| Samantha Siemers | 1811814031 | Audiologist-Hearing Aid Fitter | Galesburg, IL | 2026 |
| Sarah Siemers, NP | 1003935651 | Nurse Practitioner | Manhasset, NY | 2007 |
| Sierra Siemers, RDN | 1982559639 | Nutritionist | Long Beach, CA | 2026 |
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).