Chelsea J. Twamley, CNP
Family Nurse Practitioner · Sioux Falls, SD
Chelsea J. Twamley, CNP is a family nurse practitioner with a practice address in Sioux Falls, South Dakota, and NPI 1760615074, issued on Sep 2, 2009. Check the license (South Dakota CP000563, as entered in NPPES) with the South Dakota board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Chelsea J. Twamley
- Credential
- CNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- CP000563 SD
101.0108558 VT
Self-reported in NPPES; status is on the state search - Practice location
- 3801 S Elmwood Ave, Sioux Falls, SD 57105
- Phone
- (605) 306-6100
- Enumerated
- Sep 2, 2009
- Record last updated
- Jun 19, 2025
- Medicare enrollment
- Enrolled (PECOS I20180926000979); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 862 in South Dakota → Look up another NPI →
Also registered at 3801 S Elmwood Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Angelo Santos, M.D.Vascular Surgery Physician1861628059
- Brandi Schave, NP-CFamily Nurse Practitioner1689155335
- Joni Sengos, CNPFamily Nurse Practitioner1922406727
Verify Chelsea J. Twamley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich South Dakota board licenses this profession
Search for license CP000563Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% fewer Medicare Part D claims than the average family nurse practitioner in 2024
614 Medicare Part D claims for 205 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 68 claims were for opioids.
Most prescribed
- Clopidogrel372 claims
- Xarelto70 claims
- Hydrocodone-Acetaminophen42 claims
- Eliquis21 claims
- Tramadol Hcl19 claims
- Gabapentin17 claims
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.
The MIPS final score for 2023 (Medicare payment program): 94 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $179.33
9 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Dakota Vascular Prof LLCSioux Falls, SD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chelsea J. Twamley among 862 family nurse practitioner records in South Dakota
Chelsea J. Twamley, CNP is one of 862 family nurse practitioner records with a practice address in South Dakota. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 14% of them.
- NPI issued2009 · 14% of these records are older, 84% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2009 · median 2019 among the 615 with a school on file
- Record last updated2025 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a South Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
305 family nurse practitioner records list a practice address in Sioux Falls
They are 305 of the 6,563 NPPES records with a practice address in Sioux Falls, and 862 family nurse practitioner records in South Dakota.
All 862 in South Dakota → Every provider in Sioux Falls → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Christina Gant, CNPSioux Falls, SD 571051285732479
- Betty HolstSioux Falls, SD 571051114940350
- Kristen Hurley, CNPSioux Falls, SD 571051063488310
- Karen Jensen, CNPSioux Falls, SD 571051588691653
- Tracy Kallheim, FNP-BC, ATCSioux Falls, SD 571051932251139
- Cheri Kovalenko, CNPSioux Falls, SD 571051164508537
- Susan Leitheiser, CNPSioux Falls, SD 571051811933807
- Rebecca Mork, CNPSioux Falls, SD 571051790738797
Common questions
What is Chelsea J. Twamley, CNP's NPI number?
Chelsea J. Twamley, CNP's National Provider Identifier (NPI) is 1760615074, issued on Sep 2, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Chelsea J. Twamley, CNP located?
The NPPES record lists a practice address at 3801 S Elmwood Ave, Sioux Falls, SD, 57105. Phone: (605) 306-6100. Providers update this record themselves, so call before visiting.
How can I verify Chelsea J. Twamley, CNP's license?
NPPES lists South Dakota license number CP000563, as entered by the provider. Search the South Dakota board that licenses this profession; the NPPES record confirms identity only.
How much does Chelsea J. Twamley, CNP prescribe under Medicare Part D?
In 2024, Chelsea J. Twamley, CNP had 614 Medicare Part D claims for 205 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
What is Chelsea J. Twamley, CNP's MIPS final score?
The 2023 MIPS final score is 94 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.
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.