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

Gregory James Harbison, MD

Individual provider Orthopaedic Surgery Physician · NPI 1801425822

Gregory James Harbison, MD practises Orthopedic Surgery in Stockton, California. Qualified in 2020, 6 years ago. Practices with UT Physicians, a 1,732-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California and Texas.

Years since qualifying
6
Licensed in
CA, TX
In the registry since
2020
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

2545 W Hammer Ln
Stockton, CA 95209-2839
Phone: (209) 948-1641
Fax: (209) 951-2256
Show map & directions

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

Additional practice locations (1)

  • 6400 Fannin St Ste 1700, Houston, TX 77030-1526 — (713) 486-5527

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence A183430 (CA)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence V6947 (TX)

Record details

NPI number1801425822
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 2, 2020
Last updated in NPPESSeptember 16, 2026
Certification dateSeptember 16, 2026

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice Ut Physicians — 1732 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations7 on file with Medicare

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.

Spinal fusion 70 times · 64th percentile
Laminectomy or laminotomy (partial removal of spine bones) 28 times · 58th 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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Travel and Lodging $2,198 5 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $806 16 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at UT Physicians

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1732 clinicians in the practice; 12 are shown here.

Other providers in Stockton