Constance Haan, M.D.
NPI 1790750305 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Billings, MT
Constance Haan, M.D. is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in Billings, MT (NPI 1790750305).
Provider details
- NPI number
- 1790750305
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- ME85414 (FL)
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 tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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.
Practice location
Mailing address
Additional practice locations (1)
- 5245 Merlot LnBillings, MT 59106-2302Phone: (406) 927-2571
Registry dates
- Enumerated
- 2006-02-18
- Last updated
- 2018-07-06
Frequently asked questions
- What is Constance Haan's NPI number?
- Constance Haan's National Provider Identifier (NPI) is 1790750305, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Constance Haan's specialty?
- Constance Haan is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is Constance Haan located?
- Constance Haan's practice location on file with NPPES is 3723 Central Ave, Billings, MT 59102.
- What is Constance Haan's phone number?
- The practice phone number listed in the NPPES registry for Constance Haan is (406) 281-5344.
- Is Constance Haan's NPI active?
- Yes — Constance Haan's NPI (1790750305) is active in the NPPES registry as of the last update on 2018-07-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.