NPPES file of Aug 9, 2026

Doctors and health care providers in Clackamas, OR

2,098 individual NPPES records list a practice address in Clackamas, 12th of 171 Oregon cities. The largest group is pharmacist: 125, 6% of the city's records, against 3% across Oregon. Page 23 of 42.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

Clackamas in Oregon

  • Rank in Oregon12th of 171 cities by records
  • Share of the state1.7% of Oregon's records
  • Specialties present25 or more taxonomy codes
  • Top three groups15.3% of all records
  • Pharmacist rank5th of the 10 Oregon cities with the most

Compared with Oregon as a whole, Clackamas has 28.3× the state's share of registered respiratory therapist records and 0.20× its share of mental health counselor records.

Providers in Clackamas, alphabetically

  1. Hjalmer LofstromRegistered Respiratory Therapist1578714077
  2. Jessica LogginsCertified Registered Nurse Anesthetist1609631704
  3. Ronald Lohman, MDOrthopaedic Surgery Physician1003889403
  4. Sandra LonerganPhysical Therapy Assistant1558884478
  5. Shane Long, M.A.Clinical Social Worker1275640831
  6. Trisha Lopez, WHNP-BCWomen's Health Nurse Practitioner1063867158
  7. Cassandra Loren, MDPediatrics Physician1083119341
  8. Thomas Lorence, M.D.Internal Medicine Physician1710090691
  9. Mina Lotfi, MDDiagnostic Radiology Physician1568880813
  10. Daniel Lotspeich, MDInternal Medicine Physician1003038332
  11. Robert Love, MACOM, LACAcupuncturist1023555380
  12. Tanya Love, DAOM, LACAcupuncturist1114319175
  13. Michele LovellAddiction (Substance Use Disorder) Counselor1407675481
  14. Catherine Lowe, LAC, CNMAdvanced Practice Midwife1912092313
  15. Hillary Lowenstein, M.D.Sleep Medicine (Psychiatry & Neurology) Physician1356548903
  16. David Luc, DDSDentist1972283794
  17. John Luc, PHARM.D.Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1508110214
  18. Gregory Lucas, M.ED.Mental Health Counselor1679285969
  19. Sucely LucasCase Manager/Care Coordinator1538936588
  20. Robert Ludemann, M.D. PH.D.Surgery Physician1356354161
  21. Cora Ludwig, MDInternal Medicine Physician1881856052
  22. Jessa Lulich, PHARM.D.Pharmacist1245829704
  23. Michelle Lum, MDEmergency Medicine Physician1255860987
  24. Philip Lund, M.D.Anesthesiology Physician1447322912
  25. Thorsten Lundsgaarde, M.D.Family Medicine Physician1033208848
  26. Shi Luo, RDHDental Hygienist1356972921
  27. Waleed Lutfiyya, M.D.Surgery Physician1770652752
  28. Marc Lutz, DOAnesthesiology Physician1326095654
  29. Mitchell Luu, M.D.Internal Medicine Physician1063778793
  30. Thao Luu, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1447137088
  31. Elizabeth LygoPhysical Therapist1821109265
  32. Hana Lyman, MSWClinical Social Worker1497677900
  33. Chan Macdonald, CCC-SLPSpeech-Language Pathologist1184478562
  34. Rebecca Macgregor, MDDiagnostic Radiology Physician1659485928
  35. Alain MachtelinckxPhysical Therapist1083723357
  36. Martha Maclin, MDDiagnostic Radiology Physician1447366638
  37. Cody Macmillan, M.D.Diagnostic Radiology Physician1578906525
  38. Kristy Maffit-Schluter, PHARMDPharmacist1225289606
  39. Leanna Mah, M.D.Urology Physician1649682592
  40. Robert Mahan, M.D.Diagnostic Radiology Physician1932291309
  41. Katelin MaherClinical Social Worker1376039768
  42. Shannon MahoneyPhysical Therapy Assistant1194333906
  43. Angela Major, RDRegistered Dietitian1053681338
  44. Waseem Makhoul, MDAllergy & Immunology Physician1588862312
  45. Mike MalachiPharmacist1801315460
  46. Omar Malik, MDAnesthesiology Physician1295998961
  47. Jasjot Mann, D.D.SDentist1205094927
  48. Joshua Mann, RNCertified Registered Nurse Anesthetist1134082365
  49. Jason Mannion, M.D.Internal Medicine Physician1467847681
  50. Annelise Manns, PSYDClinical Psychologist1316562424

The largest Oregon cities

  1. Portland42,088
  2. Eugene8,239
  3. Salem6,700
  4. Bend5,313
  5. Medford4,542

All of Oregon →

How to read this directory

Clackamas, Oregon appears in the CMS National Plan and Provider Enumeration System with 2,098 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Clackamas - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a Clackamas practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in Clackamas is weighted toward Pharmacist (125 clinicians, followed by Internal Medicine Physician with 101 and Emergency Medicine Physician with 94). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to Oregon's population, Clackamas reports roughly 49.6 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.

Of Oregon's most common specialties, Counselor is the most prominent one with no provider currently listing a Clackamas practice address, a coverage gap Clackamas patients typically fill by traveling to a larger nearby hub.

For Clackamas patients, this directory is most useful as a starting shortlist. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.

For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.

Common questions

How many doctors are in Clackamas, OR?

There are 2,098 registered healthcare providers in Clackamas, OR, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Clackamas?

The most common specialties in Clackamas are Pharmacist, Internal Medicine Physician, Emergency Medicine Physician, Certified Registered Nurse Anesthetist, Family Medicine Physician. Pharmacist has the most providers with 125.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.