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MARK T BUCHHOLZ MD
NPI 1649251422
Pediatrics - Pediatric Critical Care Medicine in Portland, OR

Active since November 09, 2005PECOS Enrolled
2801 N GANTENBEIN AVE, PORTLAND, OR 97227(503) 283-5220(503) 283-9527 Get Directions Write a Review

NPPES record last updated: December 16, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mark T Buchholz Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARK T BUCHHOLZ MD (NPI 1649251422) is an individual pediatric critical care medicine provider in Portland, Oregon, licensed in Oregon (MD25508) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1649251422
Entity TypeIndividualMale
Primary Taxonomy2080P0203X
Provider Legal NameMARK T BUCHHOLZCredential: MD
Location Address2801 N GANTENBEIN AVEPortland, OR 97227-1623
Mailing AddressPo Box 821350Vancouver, WA 98682-0030 · (503) 283-5220 · Fax (503) 283-9527
Phone(503) 283-5220
Fax(503) 283-9527
Sole ProprietorNo
Enumeration DateNovember 9, 2005
Last NPPES UpdateDecember 16, 2022
NPPES CertifiedDecember 16, 2022
✔ NPI 1649251422 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080P0203X
License✔ Licensed in OR · MD25508
Definition
A pediatrician expert in advanced life support for children from the term or near-term neonate to the adolescent. This competence extends to the critical care management of life-threatening organ system failure from any cause in both medical and surgical patients and to the support of vital physiological functions. This specialist may have administrative responsibilities for intensive care units and also facilitates patient care among other specialists.
Also ListedPediatricsTaxonomy 208000000X · License MD25508 (OR)
2801 N GANTENBEIN AVE, Portland, OR 97227
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark T Buchholz Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Mark Buchholz reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Legacy Emanuel Hospital & Health Center
Same address
General Acute Care Hospital
2801 N GANTENBEIN AVE
Portland, OR 97227
  • Reassigned Medicare billing, Oregon enrollment
  • 719 clinicians in this Medicare group
NPI 1831112358 (503) 413-2200
Northwest Acute Care Specialists PC
1.9 mi
Emergency Medicine
101 SW MAIN ST STE 940
Portland, OR 97204
  • Reassigned Medicare billing, Washington enrollment
  • 108 clinicians in this Medicare group
NPI 1215983200 (503) 464-9034

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KARI MAGNUSSEN MS
Genetic Counselor, MS
2801 N GANTENBEIN AVE
PORTLAND, OR 97227
Multnomah County (503) 403-4967
NORTHWEST PEDIATRIC CRITICAL CARE PC
Pediatrics (Pediatric Critical Care Medicine)
2801 N GANTENBEIN AVE
PORTLAND, OR 97227
Multnomah County (503) 413-2794
DR. JANICE FAYE OLSON M.D.
Pediatrics (Pediatric Hematology-Oncology)
2801 N GANTENBEIN AVE
PORTLAND, OR 97227
Multnomah County (503) 276-9300
RADIOLOGY CONSULTANTS, INC
Radiology (Diagnostic Radiology)
2801 N GANTENBEIN AVE
PORTLAND, OR 97227
Multnomah County (503) 227-2400
KATHY SCHWEITZER CNP
Nurse Practitioner (Neonatal)
2801 N GANTENBEIN AVE
PORTLAND, OR 97227
Multnomah County (503) 413-2042
DR. JOEL NORMAN LAMPERT PSY.D., LPC, NCC
Psychologist
2801 N GANTENBEIN AVE
PORTLAND, OR 97227
Multnomah County (503) 276-9300
DR. NATALIE JUSTINE TEDFORD MD
Pediatrics (Pediatric Emergency Medicine)
2801 N GANTENBEIN AVE
PORTLAND, OR 97227
Multnomah County (503) 276-6500
OMAR J BHUTTA MD
Pediatrics (Pediatric Critical Care Medicine)
2801 N GANTENBEIN AVE
PORTLAND, OR 97227
Multnomah County (503) 276-6565

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Buchholz's NPI number?

The NPI number for Mark Buchholz is 1649251422. It was assigned to this individual provider in the NPPES registry on November 9, 2005.

Where is Mark Buchholz located?

Mark Buchholz practices at 2801 N Gantenbein Ave, Portland, OR 97227. The listed phone number is (503) 283-5220.

What is Mark Buchholz's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.

Is Mark Buchholz enrolled in Medicare?

Yes. Mark Buchholz is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mark Buchholz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Buchholz reassigns Medicare benefits to 2 organizations: Legacy Emanuel Hospital & Health Center (Portland, OR) and Northwest Acute Care Specialists PC (Portland, OR). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Buchholz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mark Buchholz was last updated on December 16, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.