Krystal Marie Vonfeldt, DO
Family Medicine Physician · Duncan, OK
Krystal Marie Vonfeldt, DO is a family medicine physician with a practice address in Duncan, Oklahoma, and NPI 1114294741, issued on Nov 28, 2011. Check the license (Oklahoma 5284, as entered in NPPES) on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- Krystal Marie Vonfeldt
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 5284 OK
Self-reported in NPPES; status is on the state search - Practice location
- 2120 W Elk Ave, Duncan, OK 73533
- Phone
- (580) 251-6822
- Enumerated
- Nov 28, 2011
- Record last updated
- Mar 17, 2023
- Medicaid ID
- 200443050A OK
- Medicare enrollment
- Enrolled (PECOS I20130425000622); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,303 in Oklahoma → Look up another NPI →
Also registered at 2120 W Elk Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Christopher Crimmins, MDUrology Physician1548258544
- Barbara Head, PHARM TECHPharmacy Technician1770794000
- Dennis Hughes, M.D.Internal Medicine Physician1093719981
- Melissa Hurst, MDFamily Medicine Physician1679834345
Verify Krystal Marie Vonfeldt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOklahoma Board of Medical Licensure and Supervision
Search for license 5284Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.9 times the Medicare Part D claims of the average family medicine physician in 2024
10,143 Medicare Part D claims for 361 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 624 claims were for opioids.
Most prescribed
- Levothyroxine Sodium335 claims
- Potassium Chloride323 claims
- Hydrocodone-Acetaminophen310 claims
- Atorvastatin Calcium304 claims
- Furosemide304 claims
- Losartan Potassium273 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): 91.2 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).
One hospital affiliation
- Duncan Regional Hospital, IncWaurika, OK · Acute Care Hospitals3 of 5 stars
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.
Krystal Marie Vonfeldt among 2,303 family medicine physician records in Oklahoma
Krystal Marie Vonfeldt, DO is one of 2,303 family medicine physician records with a practice address in Oklahoma. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 62% of them.
- NPI issued2011 · 62% of these records are older, 35% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2011 · median 2008 among the 1,407 with a school on file
- Record last updated2023 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 family medicine physician records list a practice address in Duncan
They are 20 of the 381 NPPES records with a practice address in Duncan, and 2,303 family medicine physician records in Oklahoma.
All 2,303 in Oklahoma → Every provider in Duncan → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jamie Cox, M.D.Duncan, OK 735331811974413
- Demetra Cox, M.D.Duncan, OK 735331295761096
- Charles Dickerson, MDDuncan, OK 735331962433748
- Judith Gilbreth, M.D.Duncan, OK 735331407823982
- Myra Gregory, D.O., LLCDuncan, OK 735331669439899
- Christopher Herndon, M.D.Duncan, OK 735331578563672
- Mathew Ivory, M.D.Duncan, OK 735331497781207
- Francis McGouran, M.D.Duncan, OK 735331205819570
Common questions
What is Krystal Marie Vonfeldt, DO's NPI number?
Krystal Marie Vonfeldt, DO's National Provider Identifier (NPI) is 1114294741, issued on Nov 28, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Krystal Marie Vonfeldt, DO located?
The NPPES record lists a practice address at 2120 W Elk Ave, Duncan, OK, 73533. Phone: (580) 251-6822. Providers update this record themselves, so call before visiting.
How can I verify Krystal Marie Vonfeldt, DO's license?
NPPES lists Oklahoma license number 5284, as entered by the provider. Search the Oklahoma Board of Medical Licensure and Supervision at https://www.okmedicalboard.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Krystal Marie Vonfeldt, DO prescribe under Medicare Part D?
In 2024, Krystal Marie Vonfeldt, DO had 10,143 Medicare Part D claims for 361 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Krystal Marie Vonfeldt, DO's MIPS final score?
The 2023 MIPS final score is 91.2 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.