DR. ANDREW JOHN MACLENNAN M.D.
NPI 1649430596
Hospitalist in Denver, CO
About Dr. Andrew John Maclennan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANDREW JOHN MACLENNAN M.D. (NPI 1649430596) is an individual hospitalist provider in Denver, Colorado, licensed in Colorado (49625) and active in the NPI registry since June 2008. He is enrolled in Medicare PECOS and is a graduate of Washington University School Of Medicine (2008).
NPPES Registry Identity
Specialties & Licenses 3
Other Identifiers 2
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. Andrew John Maclennan M.d. 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 Reassignment
Medicare enrollment records show Andrew Maclennan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Denver, CO 80247
- Reassigned Medicare billing, Colorado enrollment
- Medicare enrollment name: Colorado Permanente Medical Group PC
- 1,715 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80218 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 80218
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 Andrew Maclennan's NPI number?
The NPI number for Andrew Maclennan is 1649430596. It was assigned to this individual provider in the NPPES registry on June 13, 2008.
Where is Andrew Maclennan located?
Andrew Maclennan practices at 1719 E 19th Ave, Denver, CO 80218. The listed phone number is (303) 338-4545.
What is Andrew Maclennan's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Andrew Maclennan enrolled in Medicare?
Yes. Andrew Maclennan 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 organization bills Medicare for Andrew Maclennan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Andrew Maclennan reassigns Medicare benefits to Colorado Permanente Medical Group, P.C. (Denver, CO). The 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 Andrew Maclennan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Andrew Maclennan was last updated on July 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Dr. Andrew John Maclennan, M.D. · NPI 1649430596
Hospitalist physician in Denver, Colorado. Individual provider, active in the CMS NPPES registry since June 13, 2008.
## Identity
- **NPI:** 1649430596 (Entity type: Individual)
- **Enumerated:** June 13, 2008
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 49625 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 1719 E 19TH AVE, Denver, CO 80218-1235
- **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:** Colorado Permanente Medical Group, P.C. (NPI 1760599724, Denver, CO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Washington University School Of Medicine, class of 2008
## Record status
- **NPPES last updated:** July 27, 2026
- **Other identifiers:** Other 021729 (CO); Medicaid 72204567 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1649430596) · Data from the CMS NPPES public registry.