Nancy Callan, M.D.
NPI 1407839830 · Obstetrics & Gynecology Physician · Boston, MA
Nancy Callan, M.D. is a Obstetrics & Gynecology Physician provider in Boston, MA (NPI 1407839830).
Provider details
- NPI number
- 1407839830
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 158767 (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
- 2005-11-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Nancy Callan's NPI number?
- Nancy Callan's National Provider Identifier (NPI) is 1407839830, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Callan's specialty?
- Nancy Callan is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Callan located?
- Nancy Callan's practice location on file with NPPES is 850 Harrison Ave, Boston, MA 02118-4072.
- What is Nancy Callan's phone number?
- The practice phone number listed in the NPPES registry for Nancy Callan is (617) 414-4893.
- Is Nancy Callan's NPI active?
- Yes — Nancy Callan's NPI (1407839830) 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.