John R. Guyton, M.D.
Endocrinology, Diabetes & Metabolism Physician · Durham, NC
John R. Guyton, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Durham, North Carolina, and NPI 1861574063, issued on Oct 19, 2006. Check the license (North Carolina 36193, as entered in NPPES) on the North Carolina Medical Board; the Medicare figures below come from public CMS files.
- Name
- John R. Guyton
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 36193 NC
Self-reported in NPPES; status is on the state search - Practice location
- 4101 N Roxboro St, Durham, NC 27704
- Phone
- (919) 684-8111
- Enumerated
- Oct 19, 2006
- Record last updated
- Jun 21, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicaid ID
- 8937981 NC
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 289 in North Carolina → Look up another NPI →
Also registered at 4101 N Roxboro St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John R. Guyton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Carolina Medical Board
Search for license 36193Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
32 Medicare Part D claims for 22 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 34% of 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: $125.00
1 payment: food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 5,661 providers of this specialty with any payment received $5,742.15 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.
John R. Guyton among 289 endocrinology, diabetes & metabolism physician records in North Carolina
John R. Guyton, M.D. is one of 289 endocrinology, diabetes & metabolism physician records with a practice address in North Carolina. 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 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2013 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a North Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in North Carolina
There are 289 endocrinology, diabetes & metabolism physician records in North Carolina.
All 289 in North Carolina → Every provider in Durham → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Tracy Black, M.D.Durham, NC 277041700853660
- Francis Neelon, MDDurham, NC 277041811036585
- Tracy Setji, MDDurham, NC 277041821105107
- Jenny Tong, MD, MPHDurham, NC 277041659482636
- Matthew Crowley, MDDurham, NC 277051962542241
- Jashalynn German, M.D.Durham, NC 277051417480526
- Randol Kennedy, MDDurham, NC 277051528580511
- Robert Dobbins, M.D., PH.D.Research Triangle Park, NC 277091225465081
Common questions
What is John R. Guyton, M.D.'s NPI number?
John R. Guyton, M.D.'s National Provider Identifier (NPI) is 1861574063, issued on Oct 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John R. Guyton, M.D. located?
The NPPES record lists a practice address at 4101 N Roxboro St, Durham, NC, 27704. Phone: (919) 684-8111. Providers update this record themselves, so call before visiting.
How can I verify John R. Guyton, M.D.'s license?
NPPES lists North Carolina license number 36193, as entered by the provider. Search the North Carolina Medical Board at https://portal.ncmedboard.org/verification/search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John R. Guyton, M.D. prescribe under Medicare Part D?
In 2024, John R. Guyton, M.D. had 32 Medicare Part D claims for 22 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.