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

Mark Kromer, MD

Individual provider Trauma Surgery Physician · NPI 1255302493

Mark Kromer, MD practises General Surgery in Sacramento, California. Graduated from Medical College of Wisconsin in 2003, 23 years ago. Practices with Portsmouth Trauma and Surgical Care, LLC, a 15-clinician group. Licensed in New Hampshire.

Years since qualifying
23
Trained at
Medical College of Wisconsin
Licensed in
NH
In the registry since
2006
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

2315 Stockton Blvd Surgery Housestaff Ofc Rm 6309
Sacramento, CA 95817-2201
Phone: (916) 734-2724
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Surgical Critical Care Physician (primary) Taxonomy 2086S0102X · Licence 16915 (NH)
Trauma Surgery Physician Taxonomy 2086S0127X · Licence 16915 (NH)

Record details

NPI number1255302493
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 27, 2006
Last updated in NPPESFebruary 16, 2023
Certification dateFebruary 16, 2023

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 2003 (23 years in practice)
Group practice Portsmouth Trauma And Surgical Care, Llc — 15 clinicians
Accepts Medicare assignment Not indicated

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 1–10 times

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 patients51
Services billed 63 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

  • Portsmouth Regional Hospital Hospital · Portsmouth, NH

Colleagues at Portsmouth Trauma and Surgical Care, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 15 clinicians in the practice; 12 are shown here.

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