GREGORY S LARSEN (MD) – Anesthesiology Physician, NPI 1366447922

GREGORY S LARSEN (MD) is a healthcare provider. based in Denver, Colorado. specializing in Anesthesiology Physician. They hold the professional credentials MD. They hold a License No. 41504 (CO). The NPI Number for GREGORY S LARSEN (MD) is 1366447922

Main info

Male
27 Years Of Experience
Accepts Medicare Assignment
Name
GREGORY S LARSEN (MD)
NPI
1366447922
Phone
(719) 557-4221
Address
PO BOX 911057
Enumeration Date
20 June 2005
Last Update Date
7 July 2015

Doctor Profile

Medical School Name
JC EDWARDS SCHOOL OF MEDICINE, MARSHALL UNIVERSITY
Secondary Phone
3034383999
Graduation Year
1999 (27 years ago)
PAC ID
9931233434
Group Practice PAC ID
6002072055
Professional Enrollment ID
I20100819000691
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience54
Completeness75
Years active:20State licenses:1Digital endpointsOther names

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Provider Addresses for GREGORY S LARSEN (MD)

  • Beet Box, 1030, East 22nd Avenue, Five Points, Denver, Denver County, Colorado, 80205, United States

    DENVER, CO 802911057

    Phone: (719) 557-4221

    Fax: (719) 557-3834

    Type: Mailing

  • Saint Mary-Corwin Medical Center, 1008, Minnequa Avenue, Pueblo, Pueblo County, Colorado, 81004, United States

    PUEBLO, CO 810043733

    Phone: (719) 557-4221

    Fax: (719) 557-3834

    Type: Location

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

No Open Payments data available for this provider.

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Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 80291)

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Provider's Procedures

GREGORY S LARSEN (MD) performs procedures in Anesthesiology Physician. See the list of HCPCS codes below.
SpecialtyPractice State
HCPCS Code
Description
Service Count
Beneficiary Count
ANESTHESIOLOGYCO00790Anesthesia for procedure in upper abdomen including use of an endoscope2020

Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.
PAC ID: 6002072055View full group profile
NameSpecialtyState
A N E S T H E S I O L O G YCO
-CO
-CO
-CO
-CO
-CO
A N E S T H E S I O L O G YCO
-CO
A N E S T H E S I O L O G YCOLORADO
A N E S T H E S I O L O G YOH

Reviews

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Frequently asked questions

What is the registry number for GREGORY S LARSEN (MD)?
The registry entry for GREGORY S LARSEN (MD) shows NPI 1366447922.
Quick check: is GREGORY S LARSEN (MD) active?
Public NPPES data shows GREGORY S LARSEN (MD) with an active NPI status right now.
Which specialty label fits GREGORY S LARSEN (MD)?
NPPES ties GREGORY S LARSEN (MD) to Anesthesiology Physician in the taxonomy section. Clinical services aligned with this taxonomy classification.
Can patients visit GREGORY S LARSEN (MD) in Denver, Colorado?
For routing, start with Denver, Colorado for GREGORY S LARSEN (MD), then verify phone and hours locally.
Who maintains GREGORY S LARSEN (MD)'s record?
Providers certify NPPES data; CMS hosts the public file you are viewing.

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