Gregory S. Larsen, MD
Anesthesiology Physician · Pueblo, CO
Gregory S. Larsen, MD is an anesthesiology physician with a practice address in Pueblo, Colorado, and NPI 1366447922, issued on Jun 20, 2005. Check the license (Colorado 41504, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory S. Larsen
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 41504 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1008 Minnequa Ave, Pueblo, CO 81004
- Phone
- (719) 557-4221
- Enumerated
- Jun 20, 2005
- Record last updated
- Jul 7, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (719) 557-3834
- Medicaid ID
- 52735567 CO
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 1,202 in Colorado → Look up another NPI →
Also registered at 1008 Minnequa Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gregory S. Larsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 41504Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 73.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Gregory S. Larsen among 1,202 anesthesiology physician records in Colorado
Gregory S. Larsen, MD is one of 1,202 anesthesiology physician records with a practice address in Colorado. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 87% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2015 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anesthesiology Physician providers in Colorado
There are 1,202 anesthesiology physician records in Colorado.
All 1,202 in Colorado → Every provider in Pueblo → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Brian Bell, M.D.Pueblo, CO 810041467543207
- Eric Bernauer, MDPueblo, CO 810041053370429
- Samuel Duhon, MDPueblo, CO 810041558378042
- Pablo-Moises Garcia-Perez, CRNAPueblo, CO 810041548265119
- Michael Hanson, MDPueblo, CO 810041437166923
- James Karn, M.D.Pueblo, CO 810041023116316
- Katharine Macaulay, CRNAPueblo, CO 810041215932868
- James Salvatore, M.D.Pueblo, CO 810041184723686
Common questions
What is Gregory S. Larsen, MD's NPI number?
Gregory S. Larsen, MD's National Provider Identifier (NPI) is 1366447922, issued on Jun 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory S. Larsen, MD located?
The NPPES record lists a practice address at 1008 Minnequa Ave, Pueblo, CO, 81004. Phone: (719) 557-4221. Providers update this record themselves, so call before visiting.
How can I verify Gregory S. Larsen, MD's license?
NPPES lists Colorado license number 41504, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Gregory S. Larsen, MD's MIPS final score?
The 2023 MIPS final score is 73.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.