Summary

Dr. Mark Northfield specializes in orthopedic surgery, bringing 35 years of experience to his practice. He earned his medical degree from Warren Alpert Medical School of Brown University and completed his residency at UCLA Medical Center. Dr. Northfield provides care in English for his patients.

Dr. Northfield is affiliated with Petaluma Valley Hospital and practices with Saint Joseph Medical Group in Petaluma, California. He focuses on treating joint pain, knee problems, and arthritis. His treatment approach includes physical therapy, hands-on manual therapy, and strength training programs. Patients have given him an average rating of 3.8 out of 5 stars on Vitals.

AI-generated from data on this provider profile.

Quick Facts

  • accepting new patients
  • 3.8
  • 35 years of experience
  • 23 insurance plans accepted
  • speaks English
  • Ucla Medical Center
  • 9 written reviews
  • 1 specialty
  • 17 areas of expertise
  • 1 board certification
  • 1 hospital affiliation
  • 1 office location
  • Male

Office Location

Saint Joseph Medical Group

1496 Professional Dr Ste 601Petaluma, CA 94954
Mon8:00 am - 4:30 pm
Tue8:00 am - 4:30 pm
Wed8:00 am - 12:00 pm
Thu8:00 am - 4:30 pm
Fri8:00 am - 12:00 pm
SatClosed
SunClosed

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Dr. Mark Robert Northfield, MD
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Dr. Mark Robert Northfield, MDDr. Andrew Brooks, MDDr. Jason Marengo, MDDr. Michael Klassen, MD
Orthopedic SurgeryOrthopedic SurgeryOrthopedic SurgeryOrthopedic Surgery
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
3.8 
4.7 
4.6 
4.9 
35 Years of Experience 37 Years of Experience 25 Years of Experience 37 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option Virtual Visit Available
Speaks English Speaks English Speaks Spanish, Russian Speaks English
Petaluma , CAVacaville , CAVacaville , CAMonterey , CA
Med School: Warren Alpert Medical School Of Brown University Med School: University Of Oklahoma College Of Medicine Med School: Keck School Of Medicine Of The University Of Southern California Med School: David Geffen School of Medicine - UCLA
Current Profile
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Insurance Plans Accepted by Dr. Mark Robert Northfield

  • Accepts Medicare
  • Accepts Medicaid
  • Aetna
  • Anthem Blue Cross
  • BLUE CROSS of CALIFORNIA
  • BLUE CROSS of CALIFORNIA - HMO
  • Blue Shield of California
  • Blue Shield of California - HMO
  • Cigna
  • Community Health Options
  • Health Net - HMO
  • HealthPartners
  • Medicare
  • Medicare - Medicaid
  • Medicare - Medicare
  • Meritain Health
  • Partnership HealthPlan of California
  • Providence Health Plans
  • SCAN Health Plan
  • SCAN Health Plan - HMO
  • Tricare
  • UnitedHealthcare
  • UnitedHealthcare - HMO
  • Western Health Advantage
  • Western Health Advantage - HMO

Medical Specialties

Dr. Mark Robert Northfield has the following specialty

Specialty Expertise

Dr. Mark Robert Northfield has the following 17 areas of expertise

  • Arthroscopic Surgery (Arthroscopy)
  • Arthroscopy
  • Bone Fracture
  • Carpal Tunnel Syndrome
  • Herniated Disc
  • Hip Osteoarthritis
  • Hip Surgery
  • Hip Surgery (Hip Replacement Arthroplasty)
  • Joint Pain/Swelling
  • Joint Replacement
  • Knee Osteoarthritis
  • Knee Surgery (Knee Replacement Arthroplasty)
  • Laminectomy
  • Osteoarthritis
  • Scoliosis
  • Sports Medicine
  • Surgery

Certifications, License, & Education

35 Years Experience

MEDICAL LICENSE

Medical Doctor, California, 2026, Active

EDUCATION & TRAINING

Residency

Ucla Medical Center

Medical School

Warren Alpert Medical School Of Brown UniversityGraduated in 1991

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Frequently Asked Questions

What languages does Dr. Mark Northfield speak?
Dr. Mark Northfield speaks English.
Which hospitals is Dr. Mark Northfield affiliated with?
Dr. Mark Northfield is affiliated with Petaluma Valley Hospital.
Does Dr. Mark Northfield accept virtual/telehealth appointments?
Dr. Mark Northfield has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
How can I make an appointment with Dr. Mark Northfield?
You can find contact information for Dr. Mark Northfield here on Vitals.
Does Dr. Mark Northfield accept my insurance?
You can see the insurance plans that Dr. Mark Northfield accepts on their Vitals profile.

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