DR. THOMAS LANFEAR GRIFFITHS MD
NPI 1811217250
Anesthesiology in Denver, CO
About Dr. Thomas Lanfear Griffiths Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. THOMAS LANFEAR GRIFFITHS MD (NPI 1811217250) is an individual anesthesiology provider in Denver, Colorado, licensed in Colorado (DR.0059924) and active in the NPI registry since June 2010. He is enrolled in Medicare PECOS, is affiliated with Spectrum Health, and is a graduate of Other (2008).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Thomas Lanfear Griffiths Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Thomas Griffiths reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Denver, CO 80218
- Reassigned Medicare billing, Colorado enrollment
- 160 clinicians in this Medicare group
Denver, CO 80247
- Reassigned Medicare billing, Colorado enrollment
- Medicare enrollment name: Colorado Permanente Medical Group PC
- 1,715 clinicians in this Medicare group
Cody, WY 82414
- Reassigned Medicare billing, Montana enrollment
- 1,264 clinicians in this Medicare group
Billings, MT 59101
- Reassigned Medicare billing, Montana enrollment
- 86 clinicians in this Medicare group
Muskegon, MI 49445
- Reassigned Medicare billing, Michigan enrollment
- 2,446 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Spectrum Health
Acute Care Hospitals · Grand Rapids, MIBillings Clinic
Acute Care Hospitals · Billings, MTOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DENVER, CO 80205
DENVER, CO 80205
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 Thomas Griffiths's NPI number?
The NPI number for Thomas Griffiths is 1811217250. It was assigned to this individual provider in the NPPES registry on June 8, 2010.
Where is Thomas Griffiths located?
Thomas Griffiths practices at 2045 N Franklin St, Denver, CO 80205. The listed phone number is (303) 338-4545.
What is Thomas Griffiths's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Thomas Griffiths enrolled in Medicare?
Yes. Thomas Griffiths is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Thomas Griffiths's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Griffiths reassigns Medicare benefits to 5 organizations: Hospitalist Medicine Physicians Of Colorado - Denver PC (Denver, CO), Colorado Permanente Medical Group, P.C. (Denver, CO), Billings Clinic (Cody, WY), Granite Peak Anesthesiology Consultants (Billings, MT) and Spectrum Health Primary Care Partners (Muskegon, MI). 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 Thomas Griffiths's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Thomas Griffiths accept?
Health plans from Blue Cross and Blue Shield of Montana and Mountain Health CO-OP list Thomas Griffiths as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Thomas Griffiths affiliated with any hospitals?
According to CMS data, Thomas Griffiths is affiliated with Spectrum Health and Billings Clinic.
When was this NPI record last updated?
The NPPES record for Thomas Griffiths was last updated on June 3, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Dr. Thomas Lanfear Griffiths, MD · NPI 1811217250
Anesthesiology physician in Denver, Colorado. Individual provider, active in the CMS NPPES registry since June 8, 2010.
## Identity
- **NPI:** 1811217250 (Entity type: Individual)
- **Enumerated:** June 8, 2010
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** DR.0059924 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 2045 N FRANKLIN ST, Denver, CO 80205-5437
- **Phone:** (303) 338-4545
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Hospitalist Medicine Physicians Of Colorado - Denver PC (NPI 1588453575, Denver, CO); Colorado Permanente Medical Group, P.C. (NPI 1760599724, Denver, CO); Billings Clinic (NPI 1346288347, Cody, WY); Granite Peak Anesthesiology Consultants (NPI 1700637907, Billings, MT); Spectrum Health Primary Care Partners (NPI 1386194538, Muskegon, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2008
## Record status
- **NPPES last updated:** June 3, 2021
- **Other identifiers:** Other 028847 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1811217250) · Data from the CMS NPPES public registry.