| Dr. Jessica McMillan (2012) Professional Corp. | — | 667378 | — | Merged | |
| Dr. Jessica McMillan Professional Corp. | — | 626921 | — | Merged | |
| Dr. Jillian Bishop Professional Corporation | — | 762557 | — | Active | |
| Dr. Jillian Higgs Professional Corporation | — | 652422 | — | Active | |
| Dr. Jo-Ann Talbot Professional Corporation | — | 648243 | — | Active | |
| Dr. Jo-Anne Attard Professional Corporation | — | 627604 | — | Active | |
| Dr. JoAnne Henderson Prof. Corp. | — | 685477 | — | Active | |
| Dr. Joanah Campbell Professional Corporation | — | 679877 | — | Active | |
| Dr. Joanna Middleton Professional Corporation | — | 654107 | — | Active | |
| Dr. John A. Grant Professional Corporation | — | 663515 | — | Dissolved | |
| Dr. John A. Mowatt, Professional Corporation | — | 507464 | — | Active | |
| Dr. John A. Swan Professional Corporation | — | 659009 | — | Active | |
| Dr. John Andrew Rector Professional Corporation | — | 668258 | — | Active | |
| Dr. John Atia MD Inc. | — | 762354 | — | Merged | |
| Dr. John B. Steeves Professional Corp. | — | 515072 | — | Merged | |
| Dr. John Charles Hennessey Professional Corporation (NB) Ltd. | — | 734581 | — | Pending | |
| Dr. John E. Scovil Professional Corporation | — | 612698 | — | Active | |
| Dr. John Henderson Professional Corporation | — | 610352 | — | Active | |
| Dr. John Igoe Professional Corporation | — | 686067 | — | Active | |
| Dr. John Joseph Amirault Professional Corporation | — | 696694 | — | Active | |
| Dr. John Li P. C. Inc. | — | 510319 | — | Pending | |
| Dr. John M. Dornan Professional Corporation | — | 515252 | — | Active | |
| Dr. John M. Steeves Professional Corporation Inc. | — | 620165 | — | Dissolved | |
| Dr. John Milczarek Professional Corporation | — | 657828 | — | Active | |
| Dr. John Nicolov Professional Corporation | — | 515229 | — | Dissolved | |
| Dr. John Quinn Professional Corporation | — | 622122 | — | Merged | |
| Dr. John Roger Jeffery Holding Corporation | — | 663993 | — | Dissolved | |
| Dr. John Sherrard Orthodontist | — | 731915 | — | Active | |
| Dr. John T. Murdoch and Dr. Kimberly D. Butt Professional Corporation | — | 686101 | — | Active | |
| Dr. John Wright P.C. Inc. | — | 750939 | — | Active | |
| Dr. Johnson Cheung Professional Corporation | — | 726503 | — | Dissolved | |
| Dr. Jolanta Lalik Professional Corporation | — | 682314 | — | Active | |
| Dr. Jonaki Manna PC Inc. | — | 738980 | — | Active | |
| Dr. Jonathan Clayton Professional Corporation | — | 685072 | — | Active | |
| Dr. Jonathan Gallant and Dr. Jessica Nielsen Professional Dental Corporation | — | 694757 | — | Active | |
| Dr. Jonathan Jean Professional Corporation | — | 729693 | — | Active | |
| Dr. Jonathan Melong Professional Corporation | — | 726748 | — | Active | |
| Dr. Joonyon Park Professional Corporation | — | 728553 | — | Withdrawn | |
| Dr. Jordan N. Kavanaugh Professional Corporation | — | 679669 | — | Active | |
| Dr. Jorge Escobar Professional Corporation | — | 739625 | — | Active | |
| Dr. Josef Mir Professional Corporation | — | 666507 | — | Withdrawn | |
| Dr. Joseph C. Stanley Professional Corporation | — | 694108 | — | Active | |
| Dr. Joseph Cairns P.C. Inc. | — | 743016 | — | Active | |
| Dr. Joseph Rigley Prof. Corp. | — | 669077 | — | Active | |
| Dr. Joseph Sanford Professional Corporation | — | 724364 | — | Active | |
| Dr. Joseph Savoie Corporation Professionnelle (2022) Inc. | — | 733223 | — | Merged | |
| Dr. Joseph Stanley Fredericton Professional Corporation Inc. | — | 708401 | — | Merged | |
| Dr. Joseph Teakles C.P./P.C. Inc. | — | 620326 | — | Active | |
| Dr. Joshua Boissonneault Professional Corporation | — | 760166 | — | Active | |
| Dr. Joshua L. Tracey Professional Corporation | — | 657966 | — | Active | |
| Dr. José Ramon Ponce Martinez P.C. Inc. | — | 770046 | — | Active | |
| Dr. Josée Bernatchez C.P. Inc. | — | 639411 | — | Active | |
| Dr. Joui Makhoul P.C. Inc. | — | 764469 | — | Active | |
| Dr. Jules Melanson C.P. Inc. | — | 677327 | — | Active | |
| Dr. Julia O'Brien Professional Corporation | — | 690376 | — | Active | |
| Dr. Julie Devlin Professional Corporation | — | 696556 | — | Active | |
| Dr. Julie Hildebrand Professional Corporation | — | 668879 | — | Withdrawn | |
| Dr. Julie Villers C.P. Inc. | — | 748960 | — | Active | |
| Dr. Julien Dupuis Professional Corporation | — | 692788 | — | Active | |
| Dr. Julien LeBlanc C.P. Inc. | — | 686705 | — | Withdrawn | |
| Dr. Julien LeBlanc C.P. Inc. | — | 716248 | — | Dissolved | |
| Dr. Julien Marcoux Holdco Inc. | — | 776259 | — | Merged | |
| Dr. Julien Marcoux Professional Corporation | — | 632212 | — | Active | |
| Dr. Julien Saad Professional Corporation Inc. | — | 684658 | — | Active | |
| Dr. Julius Poon Professional Corporation | — | 702231 | — | Active | |
| Dr. Jun Ha Lee Professional Corporation | — | 767504 | — | Active | |
| Dr. June Derrah, Optometrist, Professional Corporation | — | 700136 | — | Active | |
| Dr. Justin Parker Professional Corporation | — | 701190 | — | Active | |
| Dr. Jérémie Caissie C.P. Inc. | — | 690580 | — | Withdrawn | |
| Dr. Jérémie LeBlanc Corporation Professionnelle Inc. | — | 713686 | — | Active | |
| Dr. K Cleminson Professional Corporation | — | 776471 | — | Active | |
| Dr. K. Hadley Professional Corporation | — | 685895 | — | Active | |
| Dr. K. J. DeWare Prof. Corp. | — | 628903 | — | Dissolved | |
| Dr. K. M. Manning Professional Corporation | — | 632710 | — | Merged | |
| Dr. K. M. Manning Professional Corporation | — | 707141 | — | Merged | |
| Dr. K. M. Manning Professional Corporation | — | 694038 | — | Merged | |
| Dr. K. O'Neill Medical Ltd. | — | 770459 | — | Active | |
| Dr. K. Troy Harker Professional Corporation | — | 711218 | — | Active | |
| Dr. K. Troy Harker Psychology and Neuropsychology Services | — | 685468 | — | Dissolved | |
| Dr. K. Van Middlesworth Professional Corporation | — | 646687 | — | Active | |
| Dr. K. Woods Professional Corporation | — | 661501 | — | Active | |
| Dr. Kaitlyn Rumbolt Professional Corporation Inc. | — | 733848 | — | Active | |
| Dr. Kara Allan Professional Corporation | — | 713973 | — | Active | |
| Dr. Karim Al-Khatib Professional Corporation Inc. | — | 703791 | — | Withdrawn | |
| Dr. Karina Peterson Professional Corporation Inc. | — | 671603 | — | Dissolved | |
| Dr. Karine Bouchard C.P. Inc. | — | 697561 | — | Active | |
| Dr. Karisa B. Parkington, Ph.D. | — | 731815 | — | Active | |
| Dr. Karlyne Dufour Professional Corporation Inc. | — | 510342 | — | Active | |
| Dr. Karyn Broad Professional Corporation | — | 608840 | — | Dissolved | |
| Dr. Kate Randall, P.C. Inc. | — | 622850 | — | Active | |
| Dr. Katelyn MacDonald Professional Corporation | — | 713523 | — | Active | |
| Dr. Katharine D. Herrington Professional Corporation Inc. | — | 696523 | — | Active | |
| Dr. Katherine LePage Medical Professional Corporation | — | 727594 | — | Active | |
| Dr. Kathleen Taylor Professional Corporation Inc. | — | 725636 | — | Active | |
| Dr. Kayla Roddick Medicine Inc. | — | 729270 | — | Active | |
| Dr. Kazi Shahnaz Parveen Professional Corporation | — | 714258 | — | Dissolved | |
| Dr. Keith Fullarton Prof Corp | — | 40429 | — | Active | |
| Dr. Keith G. Weber Professional Corporation | — | 663213 | — | Dissolved | |
| Dr. Keith Murdock Professional Corporation | — | 726062 | — | Active | |
| Dr. Keith W. Wilson Professional Corporation | — | 609895 | — | Active | |
| Dr. Kelan Kennedy Professional Corporation | — | 729780 | — | Active | |
| Dr. Keli Spencer Chiropractor, Professional Corporation | — | 641290 | — | Active | |
| Dr. Kelkile Professional Corporation | — | 702225 | — | Active | |
| Dr. Kelly Shaw Professional Corporation | — | 756246 | — | Active | |
| Dr. Kenneth F. Roberts, MD Inc. | — | 662877 | — | Active | |
| Dr. Kenneth Gillespie Professional Corporation | — | 509892 | — | Active | |
| Dr. Kenneth Nowlan Professional Corporation | — | 710272 | — | Active | |
| Dr. Kenneth Nowlan, Prof. Dental Corp. Inc. | — | 689681 | — | Dissolved | |
| Dr. Kerry Howatt Professional Corporation | — | 771240 | — | Active | |
| Dr. Kevin Christie Professional Corp. | — | 646312 | — | Active | |
| Dr. Khaireldeen Obead Professional Corporation | — | 688535 | — | Dissolved | |
| Dr. Khalid Al-Sharief Professional Corporation | — | 640688 | — | Active | |
| Dr. Khoi Dao Professional Corporation | — | 758792 | — | Active | |
| Dr. Kian Mostafavi Professional Corporation | — | 635431 | — | Dissolved | |
| Dr. Kim Butler Professional Corporation | — | 682691 | — | Active | |
| Dr. Kirk J. Duguay Professional Corporation | — | 611247 | — | Withdrawn | |
| Dr. Kirk Preston Professional Corporation | — | 636909 | — | Active | |
| Dr. Kirsti T. Ziola Professional Corporation | — | 727561 | — | Dissolved | |
| Dr. Krishna Pulchan Professional Corporation | — | 707210 | — | Active | |
| Dr. Krista Daigle Professional Corporation | — | 684299 | — | Pending | |
| Dr. Krista McAllister Professional Corporation | — | 700040 | — | Active | |
| Dr. Krista McDevitt Professional Corporation | — | 665452 | — | Active | |
| Dr. Kristen Brown Professional Corporation | — | 667982 | — | Active | |
| Dr. Kristen Godin Professional Corporation | — | 695897 | — | Active | |
| Dr. Kyle McCann Professional Corporation | — | 710733 | — | Active | |
| Dr. Kyle Traboulsee Professional Corporation | — | 711731 | — | Active | |
| Dr. Kyna Squarey, Professional Corporation | — | 627869 | — | Dissolved | |
| Dr. L. Anil Adisesh Professional Corporation | — | 685860 | — | Active | |
| Dr. L. Rajappannair P.C. Inc. | — | 739925 | — | Active | |
| Dr. L. V. NOFTALL M.D., FRCSC Prof. Corp. | — | 511231 | — | Active | |
| Dr. L.A. Galvis G. MD Professional Corporation | — | 750410 | — | Active | |
| Dr. L.M.W. Schaefer Professional Corporation Inc. | — | 648441 | — | Merged | |
| Dr. L.M.W. Schaefer Professional Corporation Inc. | — | 648442 | — | Merged | |
| Dr. L.M.W. Schaefer and Dr. M. Dicks Professional Corporation | — | 673958 | — | Merged | |
| Dr. L.M.W. Schaefer and Dr. S. Woodworth Professional Corporation | — | 660280 | — | Merged | |
| Dr. Lacroix Corporation Professionnelle Ltée | — | 705068 | — | Active | |
| Dr. Lance MW Schaefer and Dr. M. Dicks Professional Corporation | — | 677247 | — | Merged | |
| Dr. Landan MacDonald Professional Corporation | — | 778925 | — | Active | |
| Dr. Landry's Dream Veterinary Care Inc. | — | 777466 | — | Active | |
| Dr. Landry's Dream Veterinary Care Inc. | — | 775095 | — | Merged | |
| Dr. Larry R. Kennedy Holdings Inc. | — | 670723 | — | Active | |
| Dr. Laura Faulkner Professional Corporation | — | 724897 | — | Active | |
| Dr. Laura Flynn Professional Corporation | — | 685122 | — | Active | |
| Dr. Laura McMackin Professional Corporation | — | 707307 | — | Active | |
| Dr. Laurel Smith P.C. Inc. | — | 634185 | — | Active | |
| Dr. Lauren Wiley Professional Corporation | — | 664487 | — | Active | |
| Dr. Laurie A. Potter Medicine Professional Corporation | — | 709913 | — | Dissolved | |
| Dr. Leah Gallie Professional Corporation | — | 726257 | — | Active | |
| Dr. Lebovich Professional Corporation | — | 714043 | — | Dissolved | |
| Dr. Leighton Carter P.C. Ltd. | — | 715338 | — | Active | |
| Dr. Leo T. Cain Professional Corporation | — | 683504 | — | Active | |
| Dr. Lesley Dickson Counselling Services | — | 744108 | — | Active | |
| Dr. Leslie Ann Costello, Psychology | — | 636227 | — | Dissolved | |
| Dr. Liane Kandler P.C. Inc. | — | 742649 | — | Active | |
| Dr. Liliya MacKenzie Professional Corporation | — | 654792 | — | Active | |
| Dr. Linda Dalpé, corp. prof., Inc. | — | 510571 | — | Dissolved | |
| Dr. Linda LeBlanc C.P. Inc. | — | 610437 | — | Active | |
| Dr. Lisa McKnight Professional Corporation | — | 664926 | — | Active | |
| Dr. Lise Gagnon P.C. Inc. | — | 697523 | — | Active | |
| Dr. Lita Baines Professional Corporation | — | 514774 | — | Dissolved | |
| Dr. Lmyaa ATA Professional Corporation | — | 776120 | — | Active | |
| Dr. Lorelei Walsh Park Professional Corp. | — | 685546 | — | Active | |
| Dr. Louis A. Bourget Corporation Professionnelle Inc. | — | 502705 | — | Active | |
| Dr. Louis Juravsky Professional Corp. | — | 680085 | — | Active | |
| Dr. Louis LeBlond P.C. Inc. | — | 692450 | — | Dissolved | |
| Dr. Louis Morissette, Corporation Professionnelle | — | 43219 | — | Dissolved | |
| Dr. Louise Plant Professional Corporation | — | 664597 | — | Active | |
| Dr. Luan Le Professional Corporation | — | 645811 | — | Active | |
| Dr. Luc Arsenault Professional Corporation | — | 621733 | — | Active | |
| Dr. Luc Boudreau C.P. Inc. | — | 665578 | — | Pending | |
| Dr. Luc Cormier c.p. Inc. | — | 671983 | — | Active | |
| Dr. Luc F. Boudreau Corporation Professionnelle Inc. | — | 682664 | — | Active | |
| Dr. Luc Francoeur Professional Corporation | — | 762507 | — | Active | |
| Dr. Luc Sipkema Professional Corporation | — | 663516 | — | Merged | |
| Dr. Luc Sipkema Professional Corporation | — | 663723 | — | Active | |
| Dr. Ludmila Porto Professional Corporation | — | 742372 | — | Withdrawn | |
| Dr. Luke Duffley Professional Medical Corporation | — | 777325 | — | Active | |
| Dr. Luke MacMillan Professional Corporation | — | 764890 | — | Active | |
| Dr. Lux Home and Deck Lighting | — | 760450 | — | Active | |
| Dr. Lyndsay Crump Professional Corporation | — | 753429 | — | Active | |
| Dr. Lyndsay Lovely Professional Corporation | — | 729905 | — | Active | |
| Dr. Lyndsey MacDonald Professional Corporation | — | 678002 | — | Active | |
| Dr. Lynn Glazier P.C. Inc. | — | 512815 | — | Active | |
| Dr. Lynn Murphy-Kaulbeck P. C. Inc. | — | 635417 | — | Active | |
| Dr. Lynn N. Lamont Professional Corporation | — | 679982 | — | Active | |
| Dr. M. Alam Professional Corporation Inc. | — | 702432 | — | Active | |
| Dr. M. Alrawwaf & Dr. G. Anan Professional Corporation | — | 671440 | — | Active | |
| Dr. M. Andrawis Professional Corporation | — | 616440 | — | Withdrawn | |
| Dr. M. Boswall Professional Corporation | — | 746464 | — | Active | |
| Dr. M. Claybourn Professional Corporation | — | 665687 | — | Active | |
| Dr. M. Eghtedari Medicine Professional Corporation | — | 763092 | — | Active | |
| Dr. M. Fawaz Dawamneh Professional Corporation | — | 712203 | — | Withdrawn | |
| Dr. M. G. Fleming Professional Corporation | — | 616055 | — | Dissolved | |
| Dr. M. Godlewski Professional Corporation | — | 600786 | — | Active | |
| Dr. M. Jason MacDonald, P.C. Inc. | — | 722685 | — | Active | |
| Dr. M. L. Turcotte Professional Corporation | — | 662749 | — | Active | |
| Dr. M. Mongy P.C. Inc. | — | 739270 | — | Active | |
| Dr. M. Sirois Professional Corporation | — | 777724 | — | Active | |
| Dr. M.A. MacMillan, Prof. Corp. | — | 658169 | — | Active | |
| Dr. M.A. Moolla Professional Corporation | — | 760828 | — | Active | |