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

Individual provider Diagnostic Radiology Physician · NPI 1891743373

Thomas Sigurd Griggs, MD practises Diagnostic Radiology in Oklahoma City, Oklahoma. Qualified in 1995, 31 years ago. Practices with Singleton Associates PA, a 795-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
31
Licensed in
OK
In the registry since
2006
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

3600 NW 138th St Ste 102
Oklahoma City, OK 73134-2503 Not confirmed with CMS for 12 years — call before visiting
Phone: (405) 286-4114
Fax: (405) 463-0154
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 19576 (OK)

Record details

NPI number1891743373
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 5, 2006
Last updated in NPPESNovember 4, 2014

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolOTHER
Graduated 1995 (31 years in practice)
Group practice Singleton Associates Pa — 795 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations31 on file with Medicare

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 patients5,933
Services billed 22,787 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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. Those with a page here are linked.

Colleagues at Singleton Associates PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 795 clinicians in the practice; 12 are shown here.

Other providers in Oklahoma City