NPPES file of Aug 9, 2026

Joanna Duane Twombly, D.O.

Obstetrics & Gynecology Physician · Bolivar, MO

Joanna Duane Twombly, D.O. is an obstetrics & gynecology physician with a practice address in Bolivar, Missouri, and NPI 1780857284, issued on Apr 7, 2008. Check the license (Missouri 2018014390, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1780857284
Name
Joanna Duane Twombly
Credential
D.O.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License numbers
2018014390 MO
06-1833974 AR
DO3556 ME
LT22014 ME
75069 MN
and 2 more
Self-reported in NPPES; status is on the state search
Practice location
1500 N Oakland Ave, Bolivar, MO 65613
Phone
(417) 326-6000
Enumerated
Apr 7, 2008
Record last updated
Jan 15, 2026
Medicaid ID
197028003 AR
Medicare enrollment
Enrolled (PECOS I20230929003073); 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.
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8 nearest obstetrics & gynecology physician records → All 902 in Missouri → Look up another NPI →

Also registered at 1500 N Oakland Ave

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

  1. Anila AbrahamPharmacist1487426540
  2. Garrett Alderfer, MDInternal Medicine Physician1932424603
  3. Stephanie Aug, PAMedical Physician Assistant1225304587
  4. Brandon Barnes, FNPFamily Nurse Practitioner1528910080
  5. Ashley BatsonClinical Social Worker1184358947
  6. Robert Behnke, P.T.Physical Therapist1356558167

Verify Joanna Duane Twombly in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
    Search for license 2018014390    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
Open the Missouri license search

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83% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024

28 Medicare Part D claims for 11 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.

  1. Joanna Twombly28
  2. Specialty average165

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

3 hospitals and group practices

  1. Lake Regional Health SystemOsage Beach, MO · Acute Care Hospitals3 of 5 stars
  2. Citizens Memorial HealthcareBolivar, MO
  3. Mayo Clinic Health System-Southeast Minnesota RegionAustin, MN

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Joanna Duane Twombly among 902 obstetrics & gynecology physician records in Missouri

Joanna Duane Twombly, D.O. is one of 902 obstetrics & gynecology physician records with a practice address in Missouri. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 54% of them.

  • NPI issued2008 · 54% of these records are older, 43% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 59% of these records are
  • Graduated2008 · median 2007 among the 528 with a school on file
  • Record last updated2026 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

5 obstetrics & gynecology physician records list a practice address in Bolivar

They are 5 of the 373 NPPES records with a practice address in Bolivar, and 902 obstetrics & gynecology physician records in Missouri.

All 902 in Missouri → Every provider in Bolivar → Obstetrics & Gynecology Physician nationwide →

The 8 obstetrics & gynecology physician records with the nearest ZIP codes

  1. Briana Gomez, MDBolivar, MO 656131881275584
  2. Sarah Kallberg, D.O.Bolivar, MO 656131285860551
  3. Ashley Lane, D.O.Bolivar, MO 656131023306388
  4. Dana Meents, M.D.Bolivar, MO 656131861448854
  5. Charles Albritton, MDBranson, MO 656161992191274
  6. Myra Hughes, M.D.Billings, MO 656101861529638
  7. John McCarville, DOBranson, MO 656161831192624
  8. Debra Carson, D.O.Lebanon, MO 655361043410392

Common questions

What is Joanna Duane Twombly, D.O.'s NPI number?

Joanna Duane Twombly, D.O.'s National Provider Identifier (NPI) is 1780857284, issued on Apr 7, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Joanna Duane Twombly, D.O. located?

The NPPES record lists a practice address at 1500 N Oakland Ave, Bolivar, MO, 65613. Phone: (417) 326-6000. Providers update this record themselves, so call before visiting.

How can I verify Joanna Duane Twombly, D.O.'s license?

NPPES lists Missouri license number 2018014390, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Joanna Duane Twombly, D.O. prescribe under Medicare Part D?

In 2024, Joanna Duane Twombly, D.O. had 28 Medicare Part D claims for 11 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions 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.