NPPES file of Aug 9, 2026

Gretchen Landwehr, C.N.M.

Advanced Practice Midwife · Boston, MA

Gretchen Landwehr, C.N.M. is an advanced practice midwife with a practice address in Boston, Massachusetts, and NPI 1427114628, issued on Dec 29, 2006. Check the license (Massachusetts RN244637, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1427114628
Name
Gretchen Landwehr
Credential
C.N.M.
Primary taxonomy
Advanced Practice Midwife 367A00000X
License numbers
RN244637 MA
1714 CA
Self-reported in NPPES; status is on the state search
Practice location
1055 Commonwealth Ave, Boston, MA 02215
Phone
(617) 616-1600
Enumerated
Dec 29, 2006
Record last updated
Jun 8, 2012 (not updated in 14 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20070608000350); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest advanced practice midwife records → All 454 in Massachusetts → Look up another NPI →

Also registered at 1055 Commonwealth Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Susan Andrews, CNMAdvanced Practice Midwife1689693947
  2. Arielle Angell, CNPFamily Nurse Practitioner1619442589
  3. Lisa Arvine, NPWomen's Health Nurse Practitioner1174789077
  4. Jessica Bourbeau, MSNObstetrics & Gynecology Nurse Practitioner1205603313
  5. Olivia Donnelly, WHNP-BCWomen's Health Nurse Practitioner1578843561
  6. Jennie Drazin, PA-CPhysician Assistant1558164145

Verify Gretchen Landwehr in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
    Search for license RN244637    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Bills Medicare through one group practice

  1. Pratt Ob/gyn Associates, IncBoston, MA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Gretchen Landwehr among 454 advanced practice midwife records in Massachusetts

Gretchen Landwehr, C.N.M. is one of 454 advanced practice midwife records with a practice address in Massachusetts. 48% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.

  • NPI issued2006 · 7% of these records are older, 65% newer
  • In a Medicare fileYes · 48% of these records are
  • In the CMS Doctors and Clinicians fileYes · 39% of these records are
  • Graduated2002 · median 2013 among the 177 with a school on file
  • Record last updated2012 · 65% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 367A00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Advanced Practice Midwife providers in Massachusetts

There are 454 advanced practice midwife records in Massachusetts.

All 454 in Massachusetts → Every provider in Boston → Advanced Practice Midwife nationwide →

The 8 advanced practice midwife records with the nearest ZIP codes

  1. Susan Andrews, CNMBoston, MA 022151689693947
  2. Denise Farrell-SanseverinoBoston, MA 022151760532378
  3. Elizabeth FeinBoston, MA 022151710038302
  4. Margaret Nally, CNMBoston, MA 022151851491120
  5. Susan RoseBoston, MA 022151205989977
  6. Melissa Dinunno, CNMSouth Weymouth, MA 021901205483989
  7. Michelle Ives, CNMWeymouth, MA 021901518478270
  8. Christine Just, CNMSouth Weymouth, MA 021901851802037

Common questions

What is Gretchen Landwehr, C.N.M.'s NPI number?

Gretchen Landwehr, C.N.M.'s National Provider Identifier (NPI) is 1427114628, issued on Dec 29, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Gretchen Landwehr, C.N.M. located?

The NPPES record lists a practice address at 1055 Commonwealth Ave, Boston, MA, 02215. Phone: (617) 616-1600. Providers update this record themselves, so call before visiting.

How can I verify Gretchen Landwehr, C.N.M.'s license?

NPPES lists Massachusetts license number RN244637, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.