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JOANNA DUANE TWOMBLY D.O.
NPI 1780857284
Obstetrics & Gynecology in Bolivar, MO

Active since April 07, 2008PECOS EnrolledAccepts Medicare Assignment
1500 N OAKLAND AVE, BOLIVAR, MO 65613(417) 326-6000 Get Directions Write a Review

NPPES record last updated: January 15, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 15, 2026, Apr 4, 2024, Jul 3, 2023 and 2 more (5 updates tracked since 2023).

About Joanna Duane Twombly D.o. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOANNA DUANE TWOMBLY D.O. (NPI 1780857284) is an individual obstetrics & gynecology provider in Bolivar, Missouri, licensed in Missouri (2018014390) and active in the NPI registry since April 2008. She is enrolled in Medicare PECOS, is affiliated with Lake Regional Health System, and is a graduate of Other (2008).

NPPES Registry Identity

NPI1780857284
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameJOANNA DUANE TWOMBLYCredential: D.O.
Location Address1500 N OAKLAND AVEBolivar, MO 65613-3011
Mailing Address6456 Abigail LnRepublic, MO 65738-9496 · (419) 261-0159
Phone(417) 326-6000
Sole ProprietorNo
Medical School CMSOtherGraduated 2008
Enumeration DateApril 7, 2008
Last NPPES UpdateJanuary 15, 20265 updates tracked since enumeration
NPPES CertifiedJanuary 15, 2026
✔ NPI 1780857284 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
Licenses✔ Licensed in MO · 2018014390✔ Licensed in MN · 75069✔ Licensed in ME · DO3556✔ Licensed in WA · OP61394894✔ Licensed in OH · 34-009177✔ Licensed in ME · LT22014✔ Licensed in AR · 06-1833974
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
1500 N OAKLAND AVE, Bolivar, MO 65613
Open in Google Maps ↗

Other Identifiers 2

Medicaid197028003AR
Other267325YJL4AR · Medicare Ptan

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Joanna Duane Twombly D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2567538770
PECOS Enrollment IDI20230929003073
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

7

Medicare enrollment records show Joanna Twombly reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Citizens Memorial Healthcare
1.9 mi
Surgery
1500 N OAKLAND AVE
Bolivar, MO 65613
  • Reassigned Medicare billing, Missouri enrollment
  • 249 clinicians in this Medicare group
NPI 1568566131 (417) 326-6000
Mercy Clinic Springfield Communities
18 mi
Rural Health
118 W DALLAS ST
Buffalo, MO 65622
  • Reassigned Medicare billing, Missouri enrollment
  • Also billed through NPI 1245277631 (Missouri)
  • 1,487 clinicians in this Medicare group
NPI 1629103502 (417) 345-6101
Lake Regional Health System
53 mi
Emergency Medical Services
54 HOSPITAL DR
Osage Beach, MO 65065
  • Reassigned Medicare billing, Missouri enrollment
  • 149 clinicians in this Medicare group
NPI 1053581454 (573) 348-8000
Mercy Clinic Joplin LLC
60 mi
Emergency Medicine
3125 DR RUSSELL SMITH WAY
Carthage, MO 64836
  • Reassigned Medicare billing, Missouri enrollment
  • 562 clinicians in this Medicare group
NPI 1477822567 (417) 358-8121
Mayo Clinic Health System-Southeast Minnesota Region
416 mi
Multi-Specialty
404 W FOUNTAIN ST
Albert Lea, MN 56007
  • Reassigned Medicare billing, Minnesota enrollment
  • 1,571 clinicians in this Medicare group
NPI 1891701637 (507) 373-2384
Mayo Clinic Health System-Southwest Minnesota Region
445 mi
Multi-Specialty
501 STATE ST N
Waseca, MN 56093
  • Reassigned Medicare billing, Minnesota enrollment
  • 1,572 clinicians in this Medicare group
NPI 1518494251 (507) 835-1210
Yakima Valley Farm Workers Clinic
1,396 mi
Federally Qualified Health Center (FQHC)
4001 N COOK ST
Spokane, WA 99207
  • Reassigned Medicare billing, Washington enrollment
  • 252 clinicians in this Medicare group
NPI 1932400546 (509) 483-3427

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Lake Regional Health System

Acute Care Hospitals · Osage Beach, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number260186
Location54 Hospital DriveOsage Beach, MO 65065 · Camden County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 65613 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$121.96 typical visit price
range $52.28 – $161.24
Typical copayment $30.49 (range $13.07 – $40.31)
Most-billed visit code 99204
Established Patient
$65.71 typical visit price
range $16.30 – $131.05
Typical copayment $16.42 (range $4.07 – $32.76)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
100%46 patients5/55-star benchmark: 100%
Preventive Care and Screening: Screening for Depression and Follow-Up Plan
Percentage of patients aged 12 years and older screened for depression on the date of the encounter using an age appropriate standardized depression screening tool AND if positive, a follow-up plan is documented on the date of the positive screen
100%35 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JACOB PODLESKI
Anesthesiology
1500 N OAKLAND AVE
BOLIVAR, MO 65613
Polk County (417) 326-6000
CITIZENS MEMORIAL HOSPITAL DISTRICT
Psychiatric Unit
1500 N OAKLAND AVE
BOLIVAR, MO 65613
Polk County (417) 326-6000
CITIZENS MEMORIAL HOSPITAL DISTRICT
General Acute Care Hospital
1500 N OAKLAND AVE
BOLIVAR, MO 65613
Polk County (417) 326-6000
ZACHARY CAREL MD
Emergency Medicine
1500 N OAKLAND AVE
BOLIVAR, MO 65613
Polk County (417) 326-6000
MR. JOSHUA JAMES NOE DPT
Physical Therapist
1500 N OAKLAND AVE
BOLIVAR, MO 65613
Polk County (417) 326-6000
MS. KRISTINE TERESE GRBAC-SCHOMAKER M.A. CCC-A
Audiologist
1500 N OAKLAND AVE
BOLIVAR, MO 65613
Polk County (417) 326-6000
JENNA ROSE NOE
Occupational Therapist
1500 N OAKLAND AVE
BOLIVAR, MO 65613
Polk County (417) 326-6000
DR. NATHANIEL ALAN PEARL DO
Emergency Medicine
1500 N OAKLAND AVE
BOLIVAR, MO 65613
Polk County (417) 326-6000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Joanna Twombly's NPI number?

The NPI number for Joanna Twombly is 1780857284. It was assigned to this individual provider in the NPPES registry on April 7, 2008.

Where is Joanna Twombly located?

Joanna Twombly practices at 1500 N Oakland Ave, Bolivar, MO 65613. The listed phone number is (417) 326-6000.

What is Joanna Twombly's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Joanna Twombly enrolled in Medicare?

Yes. Joanna Twombly is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Joanna Twombly's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joanna Twombly reassigns Medicare benefits to 7 organizations: Citizens Memorial Healthcare (Bolivar, MO), Mercy Clinic Springfield Communities (Buffalo, MO), Lake Regional Health System (Osage Beach, MO), Mercy Clinic Joplin LLC (Carthage, MO), Mayo Clinic Health System-Southeast Minnesota Region (Albert Lea, MN) and 2 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Joanna Twombly's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Joanna Twombly accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 3 other insurers list Joanna Twombly as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Joanna Twombly affiliated with any hospitals?

According to CMS data, Joanna Twombly is affiliated with Lake Regional Health System.

When was this NPI record last updated?

The NPPES record for Joanna Twombly was last updated on January 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.