Zachary S. Guynn, M.D.
Family Medicine Physician · Fayetteville, AR
Zachary S. Guynn, M.D. is a family medicine physician with a practice address in Fayetteville, Arkansas, and NPI 1528258514, issued on Jul 26, 2007. Check the license (Arkansas E-5999, as entered in NPPES) on the Arkansas State Medical Board; the Medicare figures below come from public CMS files.
- Name
- Zachary S. Guynn
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- E-5999 AR
Self-reported in NPPES; status is on the state search - Practice location
- 1188 N Salem RD Ste 6, Fayetteville, AR 72704
- Phone
- (479) 442-0006
- Enumerated
- Jul 26, 2007
- Record last updated
- Aug 8, 2024
- Fax
- (479) 442-3038
- Medicare enrollment
- Enrolled (PECOS I20090904000045); accepts Medicare assignment
- Medical or professional school
- University Of Arkansas College Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 1,681 in Arkansas → Look up another NPI →
Also registered at 1188 N Salem RD Ste 6
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brent Witherington, MDFamily Medicine Physician1427144005
Verify Zachary S. Guynn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArkansas State Medical Board
Search for license E-5999Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average family medicine physician in 2024
456 Medicare Part D claims for 272 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Doxycycline Hyclate79 claims
- Amoxicillin-Clavulanate Potass65 claims
- Amoxicillin25 claims
- Prednisone23 claims
- Azithromycin21 claims
- Cephalexin21 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.
Industry payments in 2024: $49.56
3 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 55,478 providers of this specialty with any payment received $902.55 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
- Medical Associates OF Northwest Arkansas, PAFayetteville, AR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zachary S. Guynn among 1,681 family medicine physician records in Arkansas
Zachary S. Guynn, M.D. is one of 1,681 family medicine physician records with a practice address in Arkansas. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 53% of them.
- NPI issued2007 · 53% of these records are older, 39% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2007 · median 2004 among the 1,156 with a school on file
- Record last updated2024 · 58% 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 Arkansas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
97 family medicine physician records list a practice address in Fayetteville
They are 97 of the 3,890 NPPES records with a practice address in Fayetteville, and 1,681 family medicine physician records in Arkansas.
All 1,681 in Arkansas → Every provider in Fayetteville → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Larry Coker, MDFayetteville, AR 727041043456023
- Tracie Fullove, M.D.Fayetteville, AR 727041962865659
- Thomas Harris, M.D.Fayetteville, AR 727041477665446
- Stephanie Ho, MDFayetteville, AR 727041588826903
- Faith Stettmeier, APRNFayetteville, AR 727041962292474
- Brent Witherington, MDFayetteville, AR 727041427144005
- Jade Alfasi, MDFayetteville, AR 727031457046302
- Colton Batten, DOFayetteville, AR 727031164166179
Common questions
What is Zachary S. Guynn, M.D.'s NPI number?
Zachary S. Guynn, M.D.'s National Provider Identifier (NPI) is 1528258514, issued on Jul 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Zachary S. Guynn, M.D. located?
The NPPES record lists a practice address at 1188 N Salem RD Ste 6, Fayetteville, AR, 72704. Phone: (479) 442-0006. Providers update this record themselves, so call before visiting.
How can I verify Zachary S. Guynn, M.D.'s license?
NPPES lists Arkansas license number E-5999, as entered by the provider. Search the Arkansas State Medical Board at https://armedicalboard.adh.arkansas.gov/public/verify/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Zachary S. Guynn, M.D. prescribe under Medicare Part D?
In 2024, Zachary S. Guynn, M.D. had 456 Medicare Part D claims for 272 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.