Colleen Hartwig, D.O.
NPI 1720056757 · Internal Medicine Physician · Livonia, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Colleen Hartwig, D.O. is a Internal Medicine Physician provider in Livonia, MI (NPI 1720056757).
Provider details
- NPI number
- 1720056757
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 5101012752 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
850 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 379 | $80 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 204 | $119 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 117 | $175 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 110 | $114 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 26 | $133 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 14 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Isosorbide Mononitratebrand: Isosorbide Mononitrate Er | 19 | — |
| Pantoprazole Sodium | 19 | 17 |
| Carvedilol | 16 | — |
| Furosemide | 16 | 15 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 13 | — |
| Prednisone | 12 | 11 |
| Hydrocodone/Acetaminophen |
Practice location
Mailing address
Additional practice locations (1)
- 28050 Grand River AveFarmington Hills, MI 48336-5919Phone: (947) 521-8000
Registry dates
- Enumerated
- 2006-03-08
- Last updated
- 2022-07-28
- Certified
- 2022-07-28
Frequently asked questions
- What is Colleen Hartwig's NPI number?
- Colleen Hartwig's National Provider Identifier (NPI) is 1720056757, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Colleen Hartwig's specialty?
- Colleen Hartwig is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Colleen Hartwig located?
- Colleen Hartwig's practice location on file with NPPES is 36123 Schoolcraft Rd, Livonia, MI 48150-1216.
- What is Colleen Hartwig's phone number?
- The practice phone number listed in the NPPES registry for Colleen Hartwig is (734) 464-0887.
- Does Colleen Hartwig accept Medicare?
- Colleen Hartwig is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Colleen Hartwig's NPI active?
- Yes — Colleen Hartwig's NPI (1720056757) is active in the NPPES registry as of the last update on 2022-07-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.