Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Mark Anthony Sofia, MD

Individual provider Internal Medicine Physician · NPI 1912261496

Dr. Mark Anthony Sofia, MD practises Gastroenterology in Portland, Oregon. Graduated from University of Chicago, Pritzker School of Medicine in 2012, 14 years ago. Practices with University Professional Services, a 1,704-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Oregon.

Years since qualifying
14
Trained at
University of Chicago, Pritzker School of Medicine
Licensed in
OR
In the registry since
2012
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3181 SW Sam Jackson Park Rd # L461
Portland, OR 97239
Phone: (503) 494-2270
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence MD188747 (OR)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD188747 (OR)

Record details

NPI number1912261496
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 28, 2012
Last updated in NPPESAugust 14, 2018

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Medical schoolUNIVERSITY OF CHICAGO, PRITZKER SCHOOL OF MEDICINE
Graduated 2012 (14 years in practice)
Group practice University Professional Services — 1704 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Colonoscopy 80 times · 74th percentile
Upper gastrointestinal (GI) endoscopy for acid reflux 46 times · 62nd percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients158
Services billed 354 a service is one billed item, such as a visit, a test or a procedure
Average patient age66

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Hillsboro Medical Center Hospital · Hillsboro, OR
  • Ohsu Hospital And Clinics Hospital · Portland, OR
  • Samaritan Pacific Community Hospital Hospital · Newport, OR

Colleagues at University Professional Services

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1704 clinicians in the practice; 12 are shown here.

Other providers in Portland