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

MS. Allyson Rebecca Hornstein, CNM

Individual provider Midwife · NPI 1811320955

MS. Allyson Rebecca Hornstein, CNM is a Certified Nurse Midwife (CNM) in Portland, Maine. Qualified in 2013, 13 years ago. Practices with Mainehealth, a 2,615-clinician group and accepts Medicare assignment. Licensed in Massachusetts, Maine and Wisconsin.

Years since qualifying
13
Licensed in
MA, ME, WI
In the registry since
2013
Specialties on file
5
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

22 Bramhall St
Portland, ME 04102-3175
Phone: (207) 662-5400
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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 CNM212005 (ME)
Midwife Taxonomy 176B00000X · Licence 148883-32 (WI)
Advanced Practice Midwife Taxonomy 367A00000X · Licence RN2314372 (MA)
Advanced Practice Midwife Taxonomy 367A00000X · Licence 148883-32 (WI)
Registered Nurse Taxonomy 163W00000X · Licence 171241-30 (WI)

Record details

NPI number1811320955
Entity typeIndividual (Type 1)
GenderFemale
Credentials CNM
Sole proprietorNo
NPI enumeratedAugust 13, 2013
Last updated in NPPESApril 5, 2021
Certification dateApril 5, 2021

Medicare enrollment

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

Medicare specialtyCERTIFIED NURSE MIDWIFE (CNM)
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Mainehealth — 2615 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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