Madeleine Garren, M.D.
NPI 1942654447 · Anesthesiology Physician · Billings, MT
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Madeleine Garren, M.D. is a Anesthesiology Physician provider in Billings, MT (NPI 1942654447).
Provider details
- NPI number
- 1942654447
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 56951 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 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
93 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) |
|---|---|---|
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 17 | $40 |
| Anesthesia for Other Procedure on Upper Abdomen00790 | 15 | $140 |
| Anesthesia for Extensive Surgery on Spine00670 | 13 | $305 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 13 | $72 |
| Anesthesia for Procedure on Upper 2/3rd of Thigh Bone01230 | 13 | $123 |
| Anesthesia for Other Closed Procedure on Chest00520 | 11 | $82 |
Practice location
Mailing address
Additional practice locations (1)
- 10415 Wallace Alley StKingsport, TN 37663-3936Phone: (423) 968-4050
Registry dates
- Enumerated
- 2016-04-20
- Last updated
- 2025-02-04
- Certified
- 2025-02-04
Frequently asked questions
- What is Madeleine Garren's NPI number?
- Madeleine Garren's National Provider Identifier (NPI) is 1942654447, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Madeleine Garren's specialty?
- Madeleine Garren is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Madeleine Garren located?
- Madeleine Garren's practice location on file with NPPES is 3333 2nd Ave N Ste 240, Billings, MT 59101-2033.
- What is Madeleine Garren's phone number?
- The practice phone number listed in the NPPES registry for Madeleine Garren is (406) 248-3290.
- Does Madeleine Garren accept Medicare?
- Madeleine Garren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Madeleine Garren's NPI active?
- Yes — Madeleine Garren's NPI (1942654447) is active in the NPPES registry as of the last update on 2025-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.