Providers Lee Ann Klein to Michael Klein, MD
300 individual NPIs in the federal registry, part 11,575 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. 93 link to a page of their own with Medicare and CMS data the registry does not carry.
| Provider | NPI | Specialty | Practice city | NPI issued |
|---|---|---|---|---|
| Lee Ann Klein | 1720102759 | Registered Dietitian | New Rochelle, NY | 2007 |
| Leigh Klein, WHNP | 1487981452 | Obstetrics & Gynecology Nurse Practitioner | Longview, TX | 2009 |
| Leigh Klein, DMD | 1760975254 | Dentist | Plant City, FL | 2018 |
| Leonard Klein | 1255328878 | Hematology & Oncology Physician | Niles, IL | 2005 |
| Leonard Klein, D.D.S. | 1306028386 | Dentist | Bronx, NY | 2007 |
| Leonard Klein, M.D | 1336178078 | Anesthesiology Physician | Cleveland, OH | 2006 |
| Leonardo Klein, LCSW | 1952473225 | Clinical Social Worker | Jackson Heights, NY | 2006 |
| Lesa Klein, O.D. | 1770545022 | Optometrist | Saint Louis, MO | 2006 |
| Lesley Klein | 1740112556 | Nutrition Education Nutritionist | Boca Raton, FL | 2026 |
| Leslie Klein, PH.D. | 1043604291 | Psychologist | Seal Beach, CA | 2015 |
| Leslie Klein, DO | 1215151006 | Family Medicine Physician | Montebello, CA | 2007 |
| Leslie Klein | 1366722902 | Speech-Language Pathologist | Syracuse, NY | 2011 |
| Leslie Klein, MSW,ACSW | 1477811248 | Clinical Social Worker | Los Angeles, CA | 2012 |
| Leslie Klein | 1558126516 | Dental Hygienist | Redwood City, CA | 2024 |
| Leslie Klein, M.D. | 1619101771 | Hematology & Oncology Physician | Scottsdale, AZ | 2009 |
| Leslie Klein, PSY.D. | 1629487053 | Clinical Psychologist | Washington, DC | 2014 |
| Leslie Klein, N.P. | 1740281468 | Women's Health Nurse Practitioner | Charlotte, NC | 2005 |
| Leslie Klein | 1811249766 | Peer Specialist | Layton, UT | 2012 |
| Leslie Klein, DC | 1821096454 | Chiropractor | Brooklyn, NY | 2005 |
| Leslie Klein | 1851923726 | Behavior Technician | Farmington Hills, MI | 2020 |
| Levi Klein | 1699198036 | Student in an Organized Health Care Education/Training Program | Brooklyn, NY | 2014 |
| Lewis Klein | 1215114988 | Pharmacist | New Windsor, NY | 2008 |
| Lexi Klein | 1457927394 | Counselor | Seattle, WA | 2021 |
| Liba Klein | 1144941451 | Behavior Analyst | Baltimore, MD | 2022 |
| Libby Klein | 1336588508 | Clinical Social Worker | Lakewood, NJ | 2013 |
| Liesa Klein, PSY.D. | 1750793071 | Psychologist | Wichita, KS | 2014 |
| Lillian Klein | 1730949140 | Behavior Technician | Fort Collins, CO | 2024 |
| Lina Klein | 1265550909 | Clinical Social Worker | Anaheim, CA | 2007 |
| Linda Klein | 1013279868 | Specialist | Staten Island, NY | 2012 |
| Linda Klein | 1013410125 | Behavior Technician | Citrus Heights, CA | 2018 |
| Linda Klein, M.D. | 1124053327 | Psychiatry Physician | Cincinnati, OH | 2006 |
| Linda Klein | 1225166465 | Addiction (Substance Use Disorder) Counselor | Visalia, CA | 2007 |
| Linda Klein, NP | 1255303780 | Neonatal Nurse Practitioner | Boulder, CO | 2006 |
| Linda Klein | 1326391681 | Occupational Therapist | Redwood City, CA | 2012 |
| Linda Klein, PSY.D. | 1376669028 | Psychologist | Goshen, NY | 2007 |
| Linda Klein, LPC | 1417042763 | Mental Health Counselor | Colorado Springs, CO | 2006 |
| Linda Klein, MD | 1538147871 | Family Medicine Physician | Sylvania, OH | 2006 |
| Linda Klein, MD | 1629225404 | Family Medicine Physician | Vancouver, WA | 2008 |
| Linda Klein, M.A., L.P. | 1699069922 | Clinical Psychologist | St Paul, MN | 2011 |
| Linda Klein, OTR | 1780673855 | Hand Occupational Therapist | Milwaukee, WI | 2005 |
| Lindsay Klein, LMT | 1184337735 | Massage Therapist | Little Rock, AR | 2022 |
| Lindsay Klein, CRNA | 1841554540 | Certified Registered Nurse Anesthetist | Minneapolis, MN | 2012 |
| Lindsay Klein, MD | 1962781658 | Internal Medicine Physician | Concord, CA | 2011 |
| Lindsay Klein | 1962963215 | Family Medicine Physician | Richmond, VA | 2019 |
| Lindsey Klein, PTA | 1184292013 | Physical Therapy Assistant | Conyers, GA | 2021 |
| Lindsey Klein, DO | 1568216158 | Student in an Organized Health Care Education/Training Program | Spokane, WA | 2024 |
| Lindsey Klein, CCC-SLP | 1629876263 | Speech-Language Pathologist | New York, NY | 2025 |
| Lindsey Klein, RD | 1689266504 | Registered Dietitian | Manhasset, NY | 2021 |
| Lisa Klein, P.T. | 1164520482 | Physical Therapist | Washington, DC | 2006 |
| Lisa Klein, LISA KLEIN | 1194004382 | Professional Counselor | Kalamazoo, MI | 2011 |
| Lisa Klein, ATC | 1205810108 | Athletic Trainer | Buffalo Grove, IL | 2005 |
| Lisa Klein, LICSW | 1205953064 | Clinical Social Worker | Hingham, MA | 2007 |
| Lisa Klein, MSN, AGCNS-BC | 1356949960 | Clinical Nurse Specialist | Baltimore, MD | 2020 |
| Lisa Klein, M.S. ED. | 1376487769 | Pediatrics Physician | Forest Hills, NY | 2026 |
| Lisa Klein, B.S., M.S. | 1386019172 | Specialist | Getzville, NY | 2015 |
| Lisa Klein | 1396669156 | Rehabilitation Practitioner | San Luis Obispo, CA | 2026 |
| Lisa Klein, MD | 1427059955 | Pediatrics Physician | Troy, MI | 2005 |
| Lisa Klein, LPC/MHSP, NCC | 1497636716 | Professional Counselor | Maryville, TN | 2025 |
| Lisa Klein, MD | 1497751044 | Pediatric Cardiology Physician | Louisville, KY | 2005 |
| Lisa Klein, LCPC, LMAC | 1518269505 | Mental Health Counselor | Salina, KS | 2010 |
| Lisa Klein, LPC | 1629369707 | Professional Counselor | Greensburg, PA | 2011 |
| Lisa Klein, DMD | 1639496003 | Dentist | Venice, FL | 2010 |
| Lisa Klein, M.A CCC-SLP | 1639824097 | Speech-Language Pathologist | Dansville, MI | 2022 |
| Lisa Klein | 1659743086 | Nurse Practitioner | Philadelphia, PA | 2015 |
| Lisa Klein | 1700074036 | Marriage & Family Therapist | Ventura, CA | 2007 |
| Lisa Klein, MS CCC-SLP | 1922258490 | Speech-Language Pathologist | Summit, NJ | 2008 |
| Lisa Klein, LMHC | 1982444113 | Mental Health Counselor | Sarasota, FL | 2024 |
| Lisa Klein, MD | 1982640199 | Diagnostic Radiology Physician | Phoenixville, PA | 2006 |
| Livia Klein, ARNP | 1215290101 | Psychiatric/Mental Health Nurse Practitioner | Grants Pass, OR | 2012 |
| Liviu Klein, MD, MS | 1235199340 | Advanced Heart Failure and Transplant Cardiology Physician | San Francisco, CA | 2006 |
| Liza Klein, FNP-C | 1306500913 | Family Nurse Practitioner | Augusta, GA | 2021 |
| Lizabeth Klein | 1801191036 | Speech-Language Pathologist | New Bedford, MA | 2011 |
| Lloyd Klein, MD | 1063495166 | Cardiovascular Disease Physician | San Francisco, CA | 2005 |
| Logan Klein | 1295426567 | Mental Health Counselor | Murfreesboro, TN | 2023 |
| Lonnie Klein, MD | 1437141645 | Urology Physician | Safety Harbor, FL | 2005 |
| Lora Klein, COTA/L | 1437677606 | Occupational Therapy Assistant | Chapel Hill, NC | 2017 |
| Lora Klein | 1518732197 | Psychiatric/Mental Health Nurse Practitioner | Bismarck, ND | 2023 |
| Lora Klein | 1770997223 | Mental Health Counselor | Vancouver, WA | 2014 |
| Lorenzo Klein, MD | 1659489680 | Critical Care Medicine (Internal Medicine) Physician | Nashua, NH | 2006 |
| Lori Klein, LCSW | 1073016432 | School Social Worker | Fairfax, VA | 2018 |
| Lori Klein, SLP | 1235464371 | Speech-Language Pathologist | Christiansburg, VA | 2009 |
| Lori Klein, LMFT | 1437765237 | Marriage & Family Therapist | Lakeville, MN | 2020 |
| Lori Klein, LMP | 1477747400 | Contractor | Lacey, WA | 2007 |
| Lori Klein, LCSW-C | 1689903361 | Clinical Social Worker | Chevy Chase, MD | 2009 |
| Lori Klein, LCSW | 1730304833 | Clinical Social Worker | Fort Collins, CO | 2007 |
| Lorraine Klein, RN | 1659621712 | Adult Psychiatric/Mental Health Registered Nurse | Holland, MI | 2012 |
| Lorrie Klein, M.D. | 1508852799 | Dermatology Physician | Laguna Niguel, CA | 2005 |
| Louellen Klein | 1942867817 | Family Nurse Practitioner | Virginia Beach, VA | 2019 |
| Louis Klein, M.D. | 1598877698 | Independent Medical Examiner Physician | Walnut Creek, CA | 2006 |
| Louis Klein, PT | 1780723973 | Physical Therapist | Lewes, DE | 2007 |
| Louis Klein, MD | 1942231857 | Geriatric Psychiatry Physician | Rocky River, OH | 2006 |
| Lucas Klein, PH.D. | 1922263276 | Clinical Psychologist | Solana Beach, CA | 2008 |
| Lucien Klein, CMT | 1669174439 | Massage Therapist | Oakland, CA | 2023 |
| Lucy Klein | 1780027235 | Student in an Organized Health Care Education/Training Program | San Rafael, CA | 2013 |
| Lucy Klein | 1790553428 | Dentist | Seattle, WA | 2023 |
| Lucy Klein | 1841800935 | Counselor | Denver, CO | 2020 |
| Lyndi Klein, SLP | 1841687167 | Speech-Language Pathologist | Lubbock, TX | 2015 |
| Lyndsey Klein, DC | 1013661867 | Chiropractor | Beckley, WV | 2022 |
| Lyndsey Klein | 1033972872 | Mental Health Counselor | Spokane, WA | 2024 |
| Lyndsey Klein | 1134735160 | Behavior Technician | Hunt Valley, MD | 2020 |
| Lynn Klein, ED.D. | 1548485907 | Psychologist | Scottsdale, AZ | 2007 |
| Lynn Klein, M.D. | 1720147861 | Dermatology Physician | Bala Cynwyd, PA | 2006 |
| Lynne Klein, MSS, LCSW | 1922157361 | Mental Health Counselor | Princeton, NJ | 2007 |
| Maayan Klein, LCSW | 1750446605 | Clinical Social Worker | Glendale, NY | 2006 |
| Madeleine Klein, DPT | 1255218533 | Physical Therapist | Shreveport, LA | 2025 |
| Madeline Klein | 1073264883 | Behavior Technician | Henderson, NV | 2022 |
| Madeline Klein, LICSW | 1518095165 | Clinical Social Worker | Providence, RI | 2007 |
| Madeline Klein | 1861243529 | Student in an Organized Health Care Education/Training Program | Minneapolis, MN | 2024 |
| Madison Klein | 1891683025 | Mental Health Counselor | New York, NY | 2025 |
| Madison Klein | 1952134579 | Physician Assistant | Wichita, KS | 2024 |
| Madonna Klein, MPT | 1982122917 | Physical Therapist | Omaha, NE | 2017 |
| Magdalena Klein, PA | 1558669234 | Medical Physician Assistant | Fredericksburg, TX | 2011 |
| Maire Klein | 1376141309 | Behavior Technician | Tacoma, WA | 2020 |
| Malcolm Klein, MB CHB | 1043251721 | Anesthesiology Physician | Tampa, FL | 2006 |
| Malka Klein, MS | 1710454129 | Speech-Language Pathologist | Brooklyn, NY | 2018 |
| Malky Klein | 1447969936 | Specialist | Brooklyn, NY | 2022 |
| Malky Klein | 1881361368 | Specialist | Brooklyn, NY | 2021 |
| Mallory Klein | 1205550639 | Pediatric Occupational Therapist | Kissimmee, FL | 2022 |
| Mallory Klein, M.ED., BCBA | 1447683974 | Behavior Analyst | Bakersfield, CA | 2013 |
| Mallory Klein | 1629998091 | Family Nurse Practitioner | Manchester, IA | 2026 |
| Mandy Klein, LCSW | 1306862966 | Clinical Social Worker | Bartlett, TN | 2006 |
| Marc Klein, DPM | 1043212566 | Sports Medicine Podiatrist | Boca Raton, FL | 2005 |
| Marc Klein, DPM | 1376529222 | Podiatrist | Methuen, MA | 2005 |
| Marc Klein, M.D. | 1568433514 | Plastic Surgery Physician | Alpharetta, GA | 2006 |
| Marc Klein, DPM | 1699779553 | Podiatrist | Middletown, OH | 2005 |
| Marc Klein, PH.D. | 1710108477 | Marriage & Family Therapist | Pleasanton, CA | 2007 |
| Marc Klein, DPM | 1760568331 | Podiatrist | Bel Air, MD | 2006 |
| Marc Klein, M.D. | 1831172246 | Cardiovascular Disease Physician | Des Moines, IA | 2005 |
| Marc Klein, RPH | 1861714289 | Pharmacist | White Plains, NY | 2010 |
| Marci Klein, M.D. | 1942228119 | Pediatrics Physician | Ansonia, CT | 2006 |
| Marcia Klein, LCSW | 1093130544 | Mental Health Counselor | New York, NY | 2014 |
| Marcia Klein | 1124692819 | Community Health Worker | Charleston, WV | 2021 |
| Marcia Klein | 1629875984 | Personal Care Attendant | Bellevue, NE | 2025 |
| Marcia Klein, MD | 1639193808 | Specialist | Southampton, PA | 2006 |
| Marcus Klein, PSYD | 1871963454 | Student in an Organized Health Care Education/Training Program | Los Angeles, CA | 2015 |
| Marcy Klein, LCSW | 1275148215 | Social Worker | New Haven, CT | 2020 |
| Marcy Klein, DO | 1730412677 | Family Medicine Physician | Flint, MI | 2009 |
| Marcy Klein | 1942690649 | Clinical Social Worker | Plainview, NY | 2015 |
| Margaret Klein, LCSW | 1225444268 | Clinical Social Worker | Boulder, CO | 2014 |
| Margaret Klein, DDS | 1326737859 | Student in an Organized Health Care Education/Training Program | Portland, OR | 2023 |
| Margaret Klein, NP | 1376502815 | Adult Health Nurse Practitioner | Huntington, NY | 2006 |
| Margaret Klein, RN | 1457324121 | Registered Nurse | Scottsdale, AZ | 2006 |
| Margaret Klein, LCSW | 1639457518 | Clinical Social Worker | New York, NY | 2011 |
| Margaret Klein, MD, MPH | 1760242176 | Obstetrics & Gynecology Physician | Chicago, IL | 2024 |
| Maria Klein | 1427907948 | Registered Nurse | San Francisco, CA | 2026 |
| Maria Klein, FNP | 1497236079 | Family Nurse Practitioner | El Paso, TX | 2018 |
| Maria Klein, ATHLETIC TRAINER | 1750242699 | Athletic Trainer | Dubuque, IA | 2025 |
| Marian Klein, L.C.S.W. | 1932268364 | Clinical Social Worker | West Palm Beach, FL | 2006 |
| Mariana Klein, ARNP | 1093064081 | Acute Care Nurse Practitioner | Tacoma, WA | 2012 |
| Marianne Klein, OTR | 1861620825 | Occupational Therapist | Chandler, AZ | 2009 |
| Marika Klein | 1023355880 | Doula | Washington, DC | 2013 |
| Marilyn Klein, FNPC | 1023018017 | Family Nurse Practitioner | Park City, UT | 2005 |
| Mariola Klein, DOULA | 1336035005 | Doula | Bellevue, WA | 2025 |
| Marissa Klein | 1306706759 | Behavior Technician | Pooler, GA | 2025 |
| Marissa Klein, MS, CCC-SLP | 1679990006 | Speech-Language Pathologist | Downey, CA | 2014 |
| Marissa Klein, APN | 1700428158 | Primary Care Nurse Practitioner | Eatontown, NJ | 2019 |
| Mark Klein, DDS | 1023457736 | Dentist | Norton, KS | 2013 |
| Mark Klein, MD | 1093718165 | Pulmonary Disease Physician | Salinas, CA | 2005 |
| Mark Klein, MD | 1174612246 | Neurological Surgery Physician | Clinton, MD | 2006 |
| Mark Klein, M.D. | 1194776419 | Specialist | Washington, DC | 2006 |
| Mark Klein, DPM | 1255393377 | Primary Podiatric Medicine Podiatrist | Ypsilanti, MI | 2006 |
| Mark Klein, PHARMACIST | 1275857526 | Pharmacist | Bronx, NY | 2010 |
| Mark Klein, MD | 1376628529 | Nephrology Physician | Flowood, MS | 2006 |
| Mark Klein, DDS | 1467542373 | General Practice Dentistry | Lakewood, CO | 2006 |
| Mark Klein, MD | 1508844234 | Hematology & Oncology Physician | Minneapolis, MN | 2006 |
| Mark Klein, DO | 1982686390 | Family Medicine Physician | Gainesville, TX | 2005 |
| Marla Klein | 1467968842 | Mental Health Counselor | Southlake, TX | 2017 |
| Marla Klein, LMP | 1578058368 | Massage Therapist | Federal Way, WA | 2018 |
| Marla Klein | 1780084962 | Registered Dietitian | Midland Park, NJ | 2014 |
| Marla Klein, M.D. | 1912990664 | Specialist | Lake Oswego, OR | 2005 |
| Marlena Klein, PT, DPT, NCS | 1124949490 | Neurology Physical Therapist | Westlake, OH | 2026 |
| Marlena Klein, DO | 1457871063 | Internal Medicine Physician | Cherry Hill, NJ | 2017 |
| Marlene Klein, LAC | 1851423131 | Acupuncturist | Healdsburg, CA | 2007 |
| Marlowe Klein, NP | 1013766427 | Nurse Practitioner | Santa Ana, CA | 2024 |
| Marsan Klein, ARNP | 1962855148 | Nurse Practitioner | Des Moines, IA | 2016 |
| Marsha Klein, LPC, CCMHC, CACD | 1790902476 | Specialist | Philadelphia, PA | 2007 |
| Marsha Klein, LMHC | 1891748976 | Mental Health Counselor | Wellesley, MA | 2006 |
| Marshall Klein, DMD | 1508357443 | General Practice Dentistry | Castle Rock, CO | 2018 |
| Marta Klein, PA | 1497740971 | Medical Physician Assistant | Salina, KS | 2005 |
| Martha Klein, LCSWR | 1548730963 | Clinical Social Worker | New York, NY | 2018 |
| Martha Klein, LCSW | 1598036949 | Clinical Social Worker | Manteca, CA | 2012 |
| Martha Klein | 1902329055 | Specialist | Monroe, NY | 2017 |
| Marti Klein | 1457049462 | Health & Wellness Coach | Laguna Niguel, CA | 2023 |
| Martin Klein, MD | 1235209560 | Family Medicine Physician | Flemington, NJ | 2006 |
| Martin Klein, MSED | 1679996367 | Specialist | Brooklyn, NY | 2014 |
| Martin Klein, LMT | 1841521044 | Mechanotherapist | Pensacola, FL | 2010 |
| Martin Klein, PH.D. | 1902820871 | Clinical Psychologist | Westport, CT | 2006 |
| Martina Klein, M.D. | 1366468548 | Psychiatry Physician | Vista, CA | 2006 |
| Marty Klein | 1467988436 | Marriage & Family Therapist | Palo Alto, CA | 2017 |
| Mary Klein, RN, FA | 1043364714 | Registered Nurse | Waterloo, IL | 2007 |
| Mary Klein, COTA | 1104106673 | Occupational Therapy Assistant | Williamsville, NY | 2011 |
| Mary Klein | 1225595986 | Speech-Language Pathologist | Mount Airy, MD | 2019 |
| Mary Klein, LPC | 1245888700 | Professional Counselor | York, PA | 2019 |
| Mary Klein | 1255514519 | Specialist | Hannibal, MO | 2007 |
| Mary Klein, MS CCC-SLP | 1285142208 | Speech-Language Pathologist | Elkton, VA | 2018 |
| Mary Klein, MD | 1306848114 | Family Medicine Physician | Cleveland, OH | 2005 |
| Mary Klein, LCSW | 1417965567 | Clinical Social Worker | Costa Mesa, CA | 2006 |
| Mary Klein, M.D. | 1518966589 | Hematology & Oncology Physician | Valparaiso, IN | 2005 |
| Mary Klein, NCC, LPC | 1588062285 | Mental Health Counselor | Bogalusa, LA | 2014 |
| Mary Klein, CRNA | 1649254053 | Certified Registered Nurse Anesthetist | Tallahassee, FL | 2005 |
| Mary Klein, PHARM.D. | 1780875815 | Pharmacist | Abilene, TX | 2007 |
| Mary Klein, ED.D | 1831596501 | Speech-Language Pathologist | Franklin Square, NY | 2014 |
| Mary Klein, LCSW-C | 1881103836 | Clinical Social Worker | Frederick, MD | 2017 |
| Mary Elizabeth Klein, APRN | 1508703794 | Family Nurse Practitioner | Palm Beach Gardens, FL | 2026 |
| Mati Klein | 1043577430 | Occupational Therapist | Brooklyn, NY | 2012 |
| Matt Klein | 1093522856 | Addiction (Substance Use Disorder) Counselor | Fairlawn, OH | 2024 |
| Matthew Klein | 1003213349 | Orthopedic Physical Therapist | Two Rivers, WI | 2014 |
| Matthew Klein, L.P.C. | 1043442031 | Professional Counselor | Woodstock, GA | 2009 |
| Matthew Klein | 1043850753 | Physical Therapist | Stanley, ND | 2020 |
| Matthew Klein, MD | 1124073218 | Hospitalist Physician | Rochester, MN | 2006 |
| Matthew Klein, MD/PHD | 1154774321 | Psychiatry Physician | New York, NY | 2016 |
| Matthew Klein, LMSW | 1245653799 | Mental Health Counselor | Taos, NM | 2014 |
| Matthew Klein | 1255181806 | Internal Medicine Physician | Jacksonville, FL | 2024 |
| Matthew Klein, M.D. | 1255329553 | Specialist | Boca Raton, FL | 2005 |
| Matthew Klein, MD | 1265434005 | Anesthesiology Physician | Long Branch, NJ | 2005 |
| Matthew Klein, DO | 1326364233 | Child & Adolescent Psychiatry Physician | Windsor, CO | 2010 |
| Matthew Klein, MD | 1396241766 | Emergency Medicine Physician | Eau Claire, WI | 2018 |
| Matthew Klein | 1437016623 | Behavior Technician | Vallejo, CA | 2026 |
| Matthew Klein, ARNP | 1588237572 | Family Nurse Practitioner | Des Moines, IA | 2021 |
| Matthew Klein, MD | 1598318743 | Clinical Pathology/Laboratory Medicine Physician | Kinnelon, NJ | 2019 |
| Matthew Klein, MD | 1649697541 | Emergency Medicine Physician | Providence, RI | 2014 |
| Matthew Klein, MA, NCSP | 1689456345 | School Psychologist | Baltimore, MD | 2023 |
| Matthew Klein, MD | 1700680089 | Urology Physician | Penn Wynne, PA | 2025 |
| Matthew Klein, DPT | 1760924724 | Physical Therapist | Newberg, OR | 2016 |
| Matthew Klein, CRNA | 1760975577 | Certified Registered Nurse Anesthetist | Phoenix, AZ | 2018 |
| Matthew Klein, M.D. | 1770667420 | Surgery Physician | Seattle, WA | 2006 |
| Matthew Klein | 1821355397 | Pharmacist | Pullman, WA | 2012 |
| Matthew Klein, CCC-SLP | 1841016250 | Speech-Language Pathologist | Edina, MN | 2024 |
| Matthew Klein, ATC | 1881189850 | Athletic Trainer | Dublin, OH | 2018 |
| Matthew Klein, M.D. | 1962509877 | Clinical Cardiac Electrophysiology Physician | Palm Beach Gardens, FL | 2006 |
| Matthew Klein, PA-C | 1992176366 | Surgical Physician Assistant | Loveland, CO | 2015 |
| Maureen Klein, NP | 1457487266 | Pediatric Nurse Practitioner | Arvada, CO | 2007 |
| Maureen Klein | 1750745246 | Specialist | Albany, NY | 2016 |
| Maurice Klein, M.D. | 1356304448 | Surgery Physician | Roslyn Heights, NY | 2006 |
| Max Klein | 1508756677 | Psychiatric/Mental Health Registered Nurse | Syracuse, NY | 2025 |
| Max Klein, MD | 1861954836 | Cardiovascular Disease Physician | Largo, FL | 2019 |
| Maximilian Klein, M.D. | 1104244888 | Reproductive Endocrinology Physician | Rochester, NY | 2014 |
| Maxine Klein, MD | 1366545303 | Gynecology Physician | Hartford, CT | 2006 |
| Maya Klein, PH.D. | 1184871949 | Psychologist | Tigard, OR | 2008 |
| McKenna Klein | 1558005306 | Behavior Analyst | San Diego, CA | 2022 |
| McKenna Klein, RBT | 1942198841 | Behavior Technician | Eagan, MN | 2025 |
| McKenzie Klein, MS CCC-SLP | 1134812399 | Speech-Language Pathologist | Milwaukee, WI | 2023 |
| McKenzie Klein, OTR/L | 1215395157 | Pediatric Occupational Therapist | Hampstead, NC | 2016 |
| Megan Klein, MS, CCC-SLP | 1023254000 | Speech-Language Pathologist | Worcester, MA | 2008 |
| Megan Klein, PA | 1215811070 | Physician Assistant | Syosset, NY | 2025 |
| Megan Klein, M.S.CCC-SLP | 1265390397 | Speech-Language Pathologist | Petrolia, PA | 2026 |
| Megan Klein, PHARMD | 1326453481 | Pharmacist | Omaha, NE | 2014 |
| Megan Klein, PA | 1356524201 | Medical Physician Assistant | Austin, TX | 2007 |
| Megan Klein, APRN, MS, LS | 1437232766 | Psychiatric/Mental Health Nurse Practitioner | Norwich, CT | 2006 |
| Megan Klein, M.A., CCC-SLP | 1548144306 | Speech-Language Pathologist | Boynton Beach, FL | 2025 |
| Megan Klein, OTR/L | 1689499550 | Occupational Therapist | Merrillville, IN | 2024 |
| Megan Klein | 1700667540 | Speech-Language Pathologist | Grand Rapids, OH | 2023 |
| Megan Klein, DO | 1760132401 | Obstetrics & Gynecology Physician | Nashville, TN | 2022 |
| Megan Klein, DPT | 1831676220 | Physical Therapist | O Fallon, MO | 2018 |
| Megan Klein, PA | 1871008383 | Physician Assistant | Towson, MD | 2017 |
| Megan Klein, MS, RD | 1932056587 | Registered Dietitian | Clinton Township, MI | 2026 |
| Megan Klein, MSE, LPCC | 1932939691 | Mental Health Counselor | Fort Collins, CO | 2024 |
| Meghan Klein, DPT | 1245596196 | Geriatric Physical Therapist | Waconia, MN | 2012 |
| Melanie Klein, CNP | 1104848522 | Pediatric Nurse Practitioner | Cleveland, OH | 2006 |
| Melanie Klein | 1154564037 | Counselor | Portland, OR | 2009 |
| Melanie Klein, FNP-BC | 1285159400 | Family Nurse Practitioner | Danvers, MA | 2017 |
| Melanie Klein | 1336794239 | Occupational Therapist | Scarsdale, NY | 2019 |
| Melanie Klein | 1528650991 | Pulmonary Rehabilitation Registered Respiratory Therapist | Westminster, MD | 2021 |
| Melanie Klein, MD | 1578644480 | Pediatrics Physician | Sunnyvale, CA | 2006 |
| Melanie Klein, PHD | 1588257851 | Clinical Child & Adolescent Psychologist | Narberth, PA | 2021 |
| Melanie Klein, RBT | 1790499457 | Assistant Behavior Analyst | Naples, FL | 2023 |
| Melanie Klein | 1831868744 | Case Manager/Care Coordinator | Denver, CO | 2021 |
| Melinda Klein | 1447058326 | Specialist | Grand Island, NE | 2025 |
| Melinda Klein, M.P.T. | 1962425959 | Physical Therapist | Thousand Oaks, CA | 2006 |
| Melissa Klein | 1023660396 | Mental Health Counselor | Westampton, NJ | 2019 |
| Melissa Klein, AU.D | 1083925143 | Audiologist | Wichita, KS | 2010 |
| Melissa Klein | 1093260119 | Specialist | Seaford, NY | 2016 |
| Melissa Klein, CRNA | 1144479072 | Certified Registered Nurse Anesthetist | Pittsburgh, PA | 2008 |
| Melissa Klein, DPT | 1154662088 | Physical Therapist | Santa Rosa, CA | 2013 |
| Melissa Klein, PARAMEDIC | 1285423228 | Paramedic | Staten Island, NY | 2025 |
| Melissa Klein, LICSW | 1346582145 | Clinical Social Worker | Saint Paul, MN | 2013 |
| Melissa Klein, ACNP-BC | 1427352491 | Acute Care Nurse Practitioner | Fresno, CA | 2011 |
| Melissa Klein | 1487524245 | Behavior Technician | Grand Forks, ND | 2025 |
| Melissa Klein, PH.D. | 1558423301 | Clinical Psychologist | White Plains, NY | 2006 |
| Melissa Klein, LCSW | 1649091174 | Clinical Social Worker | Austin, TX | 2024 |
| Melissa Klein, MD | 1780778167 | Cardiovascular Disease Physician | Albuquerque, NM | 2006 |
| Melissa Klein, D.O. | 1821093675 | Neurology Physician | Lexington, KY | 2005 |
| Melissa Klein, PHD | 1821439415 | Pharmacist | Manitowoc, WI | 2013 |
| Melissa Klein, CRNA | 1841598794 | Certified Registered Nurse Anesthetist | Rochester, MN | 2011 |
| Melissa Klein, DNP | 1881028736 | Nurse Practitioner | Robbinsdale, MN | 2013 |
| Melissa Klein | 1912102385 | Pediatric Occupational Therapist | Lake In The Hills, IL | 2007 |
| Melissa Klein, MD | 1952488686 | Pediatrics Physician | Cincinnati, OH | 2006 |
| Melissa Klein, M.D. | 1952578569 | Internal Medicine Physician | Washington, DC | 2008 |
| Melvin Klein, M.D. | 1184673857 | Cardiovascular Disease Physician | Manhasset, NY | 2006 |
| Melvin Klein, PH.D. | 1366683815 | Psychologist | Columbia, MD | 2009 |
| Melvyn Klein, MD | 1780633560 | Nephrology Physician | Denver, CO | 2006 |
| Mendel Klein, MS, OTR/L | 1568773745 | Pediatric Occupational Therapist | Brooklyn, NY | 2010 |
| Mercedes Klein | 1568119808 | Behavior Technician | Woodbury, MN | 2022 |
| Meredith Klein, CPM, LDM | 1689897415 | Midwife | Salem, OR | 2007 |
| Mervyn Klein, MD | 1144316423 | Internal Medicine Physician | Sugar Land, TX | 2006 |
| Meryl Klein | 1730056359 | Behavior Technician | Lafayette, IN | 2025 |
| Messina Klein, LPTA | 1154617348 | Physical Therapy Assistant | Henderson, NV | 2011 |
| Mia Klein | 1124447396 | Surgery Physician | Myrtle Beach, SC | 2014 |
| Micaela Klein | 1568320208 | Behavior Technician | League City, TX | 2026 |
| Michael Klein, MD | 1003816539 | Pediatrics Physician | Toledo, OH | 2005 |
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).