Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. ANDREW JOHN MACLENNAN M.D.
NPI 1649430596
Hospitalist in Denver, CO

Q: 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.

Q: What is Andrew Maclennan's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Q: 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 22 days 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.

Active since June 13, 2008PECOS EnrolledAccepts Medicare Assignment

1719 E 19TH AVE, DENVER, CO 80218(303) 338-4545 Get Directions Write a Review

NPPES record last updated: July 27, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 27, 2026, Jul 27, 2021, Jun 14, 2021 and 1 more (4 updates tracked since 2016).

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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

NPI1649430596

Entity TypeIndividualMale

Primary Taxonomy208M00000X

Provider Legal NameDR. ANDREW JOHN MACLENNANCredential: M.D.

Location Address1719 E 19TH AVEDenver, CO 80218-1235

Mailing Address10350 E Dakota AveDenver, CO 80247-1314

Phone(303) 338-4545

Sole ProprietorNo

Medical School CMSWashington University School Of MedicineGraduated 2008

Enumeration DateJune 13, 2008

Last NPPES UpdateJuly 27, 20264 updates tracked since enumeration

NPPES CertifiedJuly 27, 2026

✔ NPI 1649430596 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

License✔ Licensed in CO · 49625

Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedInternal MedicineTaxonomy 207R00000X · License 49625 (CO)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X · License 150188 (NC)

1719 E 19TH AVE, Denver, CO 80218

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Other Identifiers 2

Other021729CO · Kaiser Commercial Number

Medicaid72204567CO

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

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.

PECOS PAC ID9032381835

PECOS Enrollment IDI20111019000823

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

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.

New Patient

$132.55 typical visit price

range $58.06 – $174.82

Typical copayment $33.13 (range $14.51 – $43.70)

Most-billed visit code 99204

Established Patient

$102.03 typical visit price

range $18.88 – $142.79

Typical copayment $25.50 (range $4.72 – $35.69)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

DR. LISA MARIE GRISS MD

Pediatrics