William Mark Barnett, M.D.
Family Medicine Physician · Rolla, MO
William Mark Barnett, M.D. is a family medicine physician with a practice address in Rolla, Missouri, and NPI 1982990214, issued on Jun 24, 2011. Check the license (Missouri 2014011573, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- William Mark Barnett
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 2014011573 MO
2011018665 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1605 Martin Springs Dr Ste 210, Rolla, MO 65401
- Phone
- (573) 458-6326
- Enumerated
- Jun 24, 2011
- Record last updated
- Jul 16, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (573) 458-6763
- Medicaid ID
- PENDING MO
- Medicare enrollment
- Enrolled (PECOS I20140731000598); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,991 in Missouri → Look up another NPI →
Also registered at 1605 Martin Springs Dr Ste 210
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kyla Hobson, FNPFamily Nurse Practitioner1356042964
Verify William Mark Barnett in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2014011573Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.9 times the Medicare Part D claims of the average family medicine physician in 2024
13,966 Medicare Part D claims for 688 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 1,394 claims were for opioids.
Most prescribed
- Lisinopril500 claims
- Levothyroxine Sodium488 claims
- Oxycodone-Acetaminophen435 claims
- Atorvastatin Calcium421 claims
- Hydrocodone-Acetaminophen408 claims
- Omeprazole358 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.
Bills Medicare through one group practice
- Mercy Clinic Springfield CommunitiesRolla, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Mark Barnett among 2,991 family medicine physician records in Missouri
William Mark Barnett, M.D. is one of 2,991 family medicine physician records with a practice address in Missouri. 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 · 59% of these records are
- Graduated2011 · median 2006 among the 1,778 with a school on file
- Record last updated2014 · 53% 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 Missouri 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 Rolla
They are 20 of the 621 NPPES records with a practice address in Rolla, and 2,991 family medicine physician records in Missouri.
All 2,991 in Missouri → Every provider in Rolla → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Cathy Bond, D.O.Rolla, MO 654011992728687
- Kathi Clement, MDRolla, MO 654011780721431
- Abigail Crisostomo, MDRolla, MO 654011720347867
- Randall Dudik, MDRolla, MO 654011154487700
- James Felts, MDRolla, MO 654011801960992
- Katie Hern, M.D.Rolla, MO 654011093936585
- Stephanie Huhn, D.O.Rolla, MO 654011760564637
- Matthew Hurley, M.D.Rolla, MO 654011821362088
Common questions
What is William Mark Barnett, M.D.'s NPI number?
William Mark Barnett, M.D.'s National Provider Identifier (NPI) is 1982990214, issued on Jun 24, 2011. An NPI identifies a provider in billing; it is not a license.
Where is William Mark Barnett, M.D. located?
The NPPES record lists a practice address at 1605 Martin Springs Dr Ste 210, Rolla, MO, 65401. Phone: (573) 458-6326. Providers update this record themselves, so call before visiting.
How can I verify William Mark Barnett, M.D.'s license?
NPPES lists Missouri license number 2014011573, 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 William Mark Barnett, M.D. prescribe under Medicare Part D?
In 2024, William Mark Barnett, M.D. had 13,966 Medicare Part D claims for 688 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.
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.