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

Dr. Gregory Daniel Spin, DO

Individual provider Nephrology Physician · NPI 1114977386

Dr. Gregory Daniel Spin, DO practises Nephrology in Roseville, California. Graduated from College of Osteopathic Physicians and Surgeons of Los Angeles in 1999, 27 years ago. Practices with Summit Nephrology Medical Group, Inc, a 10-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
27
Trained at
College of Osteopathic Physicians and Surgeons of Los Angeles
Licensed in
CA
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

151 N Sunrise Ave Ste 1205
Roseville, CA 95661-2924 Not confirmed with CMS for 11 years — call before visiting
Phone: (916) 789-1505
Fax: (916) 789-1513
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 20A7602 (CA)

Record details

NPI number1114977386
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 11, 2006
Last updated in NPPESDecember 15, 2014

Medicare enrollment

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

Medicare specialtyNEPHROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolCOLLEGE OF OSTEOPATHIC PHYSICIANS AND SURGEONS OF LOS ANGELES
Graduated 1999 (27 years in practice)
Group practice Summit Nephrology Medical Group, Inc. — 10 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients688
Services billed 2,758 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

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.

Food and Beverage $572 13 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 Summit Nephrology Medical Group, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Roseville