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

Joanna Duane Twombly, DO

Individual provider Obstetrics & Gynecology Physician · NPI 1780857284

Joanna Duane Twombly, DO is an Obstetrics/Gynecology in Bolivar, Missouri. Qualified in 2008, 18 years ago. Practices with Citizens Memorial Healthcare, a 145-clinician group and accepts Medicare assignment. Licensed in Arkansas, Maine, Minnesota and Missouri and 2 more.

Years since qualifying
18
Licensed in
AR, ME, MN, MO, OH, WA
In the registry since
2008
Specialties on file
7
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1500 N Oakland Ave
Bolivar, MO 65613-3011
Phone: (417) 326-6000
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 2018014390 (MO)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence 75069 (MN)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence DO3556 (ME)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence OP61394894 (WA)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence 34-009177 (OH)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence LT22014 (ME)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence 06-1833974 (AR)

Record details

NPI number1780857284
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 7, 2008
Last updated in NPPESJanuary 15, 2026
Certification dateJanuary 15, 2026

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Also practisesOSTEOPATHIC MANIPULATIVE MEDICINE
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Citizens Memorial Healthcare — 145 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

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