Mary Hennessy, M.D.
NPI 1104980119 · Psychiatry Physician · Marshfield, WI
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Hennessy, M.D. is a Psychiatry Physician provider in Marshfield, WI (NPI 1104980119).
Provider details
- NPI number
- 1104980119
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 33238 (MN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2006-12-21
- Last updated
- 2011-09-16
Frequently asked questions
- What is Mary Hennessy's NPI number?
- Mary Hennessy's National Provider Identifier (NPI) is 1104980119, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Hennessy's specialty?
- Mary Hennessy is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Hennessy located?
- Mary Hennessy's practice location on file with NPPES is 1000 N Oak Ave, Marshfield, WI 54449-5703.
- What is Mary Hennessy's phone number?
- The practice phone number listed in the NPPES registry for Mary Hennessy is (715) 387-5511.
- Does Mary Hennessy accept Medicare?
- Mary Hennessy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Hennessy's NPI active?
- Yes — Mary Hennessy's NPI (1104980119) is active in the NPPES registry as of the last update on 2011-09-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.