Joseph Madsen, M.D.
NPI 1538149687 · Neurological Surgery Physician · Boston, MA
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Madsen, M.D. is a Neurological Surgery Physician provider in Boston, MA (NPI 1538149687).
Provider details
- NPI number
- 1538149687
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 56378 (MA)
Specialties & taxonomies
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
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
- 2006-01-17
- Last updated
- 2007-07-08
Frequently asked questions
- What is Joseph Madsen's NPI number?
- Joseph Madsen's National Provider Identifier (NPI) is 1538149687, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Madsen's specialty?
- Joseph Madsen is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Madsen located?
- Joseph Madsen's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is Joseph Madsen's phone number?
- The practice phone number listed in the NPPES registry for Joseph Madsen is (617) 355-6005.
- Does Joseph Madsen accept Medicare?
- Joseph Madsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Madsen's NPI active?
- Yes — Joseph Madsen's NPI (1538149687) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.