Gretchen Landwehr, C.N.M.
NPI 1427114628 · Advanced Practice Midwife · Boston, MA
Enrolled with Medicare as Order and Referring Only - Certified Nurse Midwife (cnm) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gretchen Landwehr, C.N.M. is a Advanced Practice Midwife provider in Boston, MA (NPI 1427114628).
Provider details
- NPI number
- 1427114628
- Entity type
- Individual
- Primary specialty
- Advanced Practice MidwifePhysician Assistants & Advanced Practice Nursing Providers
- Credential
- C.N.M.
- Sex
- Female
- Sole proprietor
- No
- License
- 1714 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
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
- 2006-12-29
- Last updated
- 2012-06-08
Frequently asked questions
- What is Gretchen Landwehr's NPI number?
- Gretchen Landwehr's National Provider Identifier (NPI) is 1427114628, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gretchen Landwehr's specialty?
- Gretchen Landwehr is listed in the NPPES registry with a primary specialty of Advanced Practice Midwife (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gretchen Landwehr located?
- Gretchen Landwehr's practice location on file with NPPES is 1055 Commonwealth Ave, Boston, MA 02215-1001.
- What is Gretchen Landwehr's phone number?
- The practice phone number listed in the NPPES registry for Gretchen Landwehr is (617) 616-1600.
- Does Gretchen Landwehr accept Medicare?
- Gretchen Landwehr is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gretchen Landwehr's NPI active?
- Yes — Gretchen Landwehr's NPI (1427114628) is active in the NPPES registry as of the last update on 2012-06-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.