MELISSA LARSON MD
NPI 1477530566
Anesthesiology in Denver, CO
About Melissa Larson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MELISSA LARSON MD (NPI 1477530566) is an individual anesthesiology provider in Denver, Colorado, licensed in Colorado (DR.0036840) and active in the NPI registry since December 2005. She is enrolled in Medicare PECOS, maintains a secondary practice location in Westminster, and is a graduate of University Of Kansas School Of Med (kc/wich/sal) (1994).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 8
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
Melissa Larson 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
2Medicare enrollment records show Melissa Larson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Denver, CO 80204
- Reassigned Medicare billing, Colorado enrollment
- 1,193 clinicians in this Medicare group
Greenwood Village, CO 80111
- Reassigned Medicare billing, Colorado enrollment
- 971 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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other 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 80203
DENVER, CO 80203
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 Melissa Larson's NPI number?
The NPI number for Melissa Larson is 1477530566. It was assigned to this individual provider in the NPPES registry on December 29, 2005.
Where is Melissa Larson located?
Melissa Larson practices at 455 Sherman St Ste 510, Denver, CO 80203. The listed phone number is (303) 377-6825.
What is Melissa Larson's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Melissa Larson enrolled in Medicare?
Yes. Melissa Larson 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 Melissa Larson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Melissa Larson reassigns Medicare benefits to 2 organizations: Catholic Health Initiatives Colorado (Denver, CO) and Us Anesthesia Partners Of Colorado Inc. (Greenwood Village, CO). 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 Melissa Larson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Melissa Larson accept?
Health plans from Oscar Health and Oscar Insurance Company list Melissa Larson 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.
When was this NPI record last updated?
The NPPES record for Melissa Larson was last updated on July 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.
# Melissa Larson, MD · NPI 1477530566
Anesthesiology physician in Denver, Colorado. Individual provider, active in the CMS NPPES registry since December 29, 2005.
## Identity
- **NPI:** 1477530566 (Entity type: Individual)
- **Enumerated:** December 29, 2005
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** DR.0036840 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 455 SHERMAN ST, STE 510, Denver, CO 80203-4400
- **Phone:** (303) 377-6825 · **Fax:** (303) 780-0787
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Catholic Health Initiatives Colorado (NPI 1134224462, Denver, CO); Us Anesthesia Partners Of Colorado Inc. (NPI 1922365782, Greenwood Village, CO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Kansas School Of Med, class of 1994
## Record status
- **NPPES last updated:** July 9, 2026
- **Other identifiers:** Medicaid 114221600 (WY); Medicaid 3506685 (MT); Medicaid 100335770A (KS); and 5 more
---
Source: [NPI Profile](https://npiprofile.com/npi/1477530566) · Data from the CMS NPPES public registry.