COLLEEN A HARTWIG D.O.
NPI 1720056757
Internal Medicine in Livonia, MI
About Colleen A Hartwig D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
COLLEEN A HARTWIG D.O. (NPI 1720056757) is an individual internal medicine provider in Livonia, Michigan, licensed in Michigan (5101012752) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS, is affiliated with Beaumont Hospital - Farmington Hills, and maintains a secondary practice location in Farmington Hills.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
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
Colleen A Hartwig D.o. 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 Colleen Hartwig reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Livonia, MI 48150
- Reassigned Medicare billing, Michigan enrollment
- 177 clinicians in this Medicare group
Royal Oak, MI 48073
- Reassigned Medicare billing, Michigan enrollment
- 946 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 6
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beaumont Hospital - Farmington Hills
Acute Care Hospitals · Farmington Hills, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48150 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 4
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
LIVONIA, MI 48150
LIVONIA, MI 48150
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 Colleen Hartwig's NPI number?
The NPI number for Colleen Hartwig is 1720056757. It was assigned to this individual provider in the NPPES registry on March 8, 2006.
Where is Colleen Hartwig located?
Colleen Hartwig practices at 36123 Schoolcraft Rd, Livonia, MI 48150. The listed phone number is (734) 464-0887.
What is Colleen Hartwig's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Colleen Hartwig enrolled in Medicare?
Yes. Colleen Hartwig 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 Colleen Hartwig's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Colleen Hartwig reassigns Medicare benefits to 2 organizations: Inpatient Consultants Of Michigan PC (Livonia, MI) and Beaumont Medical Group Hospital -Based Services (Royal Oak, MI). 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 Colleen Hartwig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Colleen Hartwig accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian and Priority Health list Colleen Hartwig 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.
Is Colleen Hartwig affiliated with any hospitals?
According to CMS data, Colleen Hartwig is affiliated with Beaumont Hospital - Farmington Hills.
When was this NPI record last updated?
The NPPES record for Colleen Hartwig was last updated on July 28, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.
# Colleen A Hartwig, D.O. · NPI 1720056757
Internal Medicine physician in Livonia, Michigan. Individual provider, active in the CMS NPPES registry since March 8, 2006.
## Identity
- **NPI:** 1720056757 (Entity type: Individual)
- **Enumerated:** March 8, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 5101012752 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 36123 SCHOOLCRAFT RD, Livonia, MI 48150-1216
- **Phone:** (734) 464-0887 · **Fax:** (734) 402-0254
## 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): Inpatient Consultants Of Michigan PC (NPI 1861442824, Livonia, MI); Beaumont Medical Group Hospital -Based Services (NPI 1427567858, Royal Oak, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Osteopathic Medicine, class of 1995
## Record status
- **NPPES last updated:** July 28, 2022
- **Other identifiers:** Medicaid 4622994 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1720056757) · Data from the CMS NPPES public registry.