DR. GARY MICHAEL BREEN (MD) – Hospitalist Physician, NPI 1124089396

DR. GARY MICHAEL BREEN (MD) is a healthcare provider. based in Englewood, Colorado. specializing in INTERNAL MEDICINE. They hold the professional credentials MD. They hold a License No. 37128 (CO). The NPI Number for DR. GARY MICHAEL BREEN (MD) is 1124089396

Main info

Male
32 Years Of Experience
Accepts Medicare Assignment
Name
DR. GARY MICHAEL BREEN (MD)
NPI
1124089396
Phone
(303) 338-4545
Address
501 E HAMPDEN AVE
Enumeration Date
29 March 2006
Last Update Date
23 October 2013

Doctor Profile

Medical School Name
UNIVERSITY OF MINNESOTA MEDICAL SCHOOL
Secondary Phone
9708791322
Graduation Year
1994 (32 years ago)
PAC ID
1052334513
Group Practice PAC ID
5890685689
Professional Enrollment ID
I20060111000683
Address ID
CO804878813ST1024XDRXX400
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

2,994 INTERNAL MEDICINE in CO

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Provider Addresses for DR. GARY MICHAEL BREEN (MD)

  • Swedish Medical Center, 501, East Hampden Avenue, Englewood, Arapahoe County, Colorado, 80113, United States

    ENGLEWOOD, CO 801132702

    Phone: (303) 338-4545

    Mailing address matches the actual address.

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.

This can happen when there are no reportable CMS Open Payments records.

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

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

PECOS enrollment status

Participating (accepts Medicare assignment)

Enrollment effective: 2006-01-11

PECOS data refreshed: 2026-05-27

Medicare revalidation (CMS due date list)

Due date not assigned yet

CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.

Enrollment records

1

Earliest due date

Not assigned (TBD)

CMS data updated

2026-06-01

Revalidation progress

  1. Medicare enrolled
  2. On CMS revalidation list
  3. Due date assigned
  4. Revalidate in PECOS

CMS enrollment records

Enrollment IDTypeSpecialtyStateDue date
I20060111000683IInternal MedicineCOTBD

What to do next

  • No action required while the due date shows TBD.
  • Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
  • Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.

Verify on CMS Revalidation Lookup Tool

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.

Top Medicare procedures (2023) · refreshed 2026-05-27

HCPCSDescriptionServicesBeneficiariesMedicare allowed
99239Hospital discharge day management, more than 30 minutes129116$0
99232Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes12467$0
99233Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes12270$0
99223Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes7772$0
99222Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes2626$0
View full utilization report →

Insurance plans in this area (ZIP 80113)

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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: 5890685689View full group profile
NameSpecialtyState
-CO
-CO
E N D O C R I N O L O G YTN
-NV
Emergency MedicineCO
Diagnostic Radiology, Interventional RadiologyID
-CO
Physical Therapist In Private PracticeCO
-FL
Physician AssistantCO

Reviews

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Frequently asked questions

Is DR. GARY MICHAEL BREEN (MD) listed with a National Provider Identifier?
Yes — DR. GARY MICHAEL BREEN (MD) has NPI 1124089396 on file in the registry.
Is DR. GARY MICHAEL BREEN (MD) shown as active in public data?
Registry records indicate DR. GARY MICHAEL BREEN (MD) maintains an active NPI.
What kind of doctor is DR. GARY MICHAEL BREEN (MD)?
DR. GARY MICHAEL BREEN (MD) is associated with Hospitalist Physician in the directory — Clinical services aligned with this taxonomy classification.
What practice footprint exists for DR. GARY MICHAEL BREEN (MD)?
Travel planning: use Englewood, Colorado as the reference point for DR. GARY MICHAEL BREEN (MD), then confirm.
Does inactive status remove historical data?
Historical rows can remain visible after status changes — read the dates carefully.

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