Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Gretchen Landwehr, CNM

Individual provider Advanced Practice Midwife · NPI 1427114628

Gretchen Landwehr, CNM is a Certified Nurse Midwife (CNM) in Boston, Massachusetts. Qualified in 2002, 24 years ago. Practices with Pratt OB/GYN Associates, Inc, a 60-clinician group and accepts Medicare assignment. Licensed in California and Massachusetts.

Years since qualifying
24
Licensed in
CA, MA
In the registry since
2006
Specialties on file
2
What do these letters mean?
CNM — Certified Nurse-Midwife
An advanced practice nurse who provides prenatal care and delivers babies.

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Practice location Address checks out

1055 Commonwealth Ave
Boston, MA 02215-1001
Phone: (617) 616-1600
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Advanced Practice Midwife (primary) Taxonomy 367A00000X · Licence RN244637 (MA)
Advanced Practice Midwife Taxonomy 367A00000X · Licence 1714 (CA)

Record details

NPI number1427114628
Entity typeIndividual (Type 1)
GenderFemale
Credentials CNM
Sole proprietorNo
NPI enumeratedDecember 29, 2006
Last updated in NPPESJune 8, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCERTIFIED NURSE MIDWIFE (CNM)
Medical schoolOTHER
Graduated 2002 (24 years in practice)
Group practice Pratt Ob/Gyn Associates, Inc — 60 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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