William B. Guyol, MD
Internal Medicine Physician · Saint Louis, MO
William B. Guyol, MD is an internal medicine physician with a practice address in Saint Louis, Missouri, and NPI 1396738019, issued on Aug 28, 2005. Check the license (Missouri R2D06, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William B. Guyol
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- R2D06 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1035 Bellevue Ave, Saint Louis, MO 63117
- Phone
- (314) 646-7015
- Enumerated
- Aug 28, 2005
- Record last updated
- Aug 5, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (314) 646-7016
- Medicaid ID
- 202318913 MO
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
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Verify William B. Guyol 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 R2D06Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William B. Guyol among 2,604 internal medicine physician records in Missouri
William B. Guyol, MD is one of 2,604 internal medicine physician records with a practice address in Missouri. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileNo · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 55% of these records are
- Record last updated2013 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
941 internal medicine physician records list a practice address in Saint Louis
They are 941 of the 27,605 NPPES records with a practice address in Saint Louis, and 2,604 internal medicine physician records in Missouri. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,604 in Missouri → Every provider in Saint Louis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Abbott, MDRichmond Heights, MO 631171568448850
- Monika Aplyn, M.D.Saint Louis, MO 631171336195247
- Kathleen Brunts, M.D.Saint Louis, MO 631171851382204
- Danita Cole, MDSaint Louis, MO 631171639152374
- Mohammad Emami, MDSaint Louis, MO 631171598712671
- Snehal Gandhi, M.D.Saint Louis, MO 631171184608689
- Alka Kapoor, MDSaint Louis, MO 631171639122633
- Piotr Kulikowski, MDSaint Louis, MO 631171053388678
Common questions
What is William B. Guyol, MD's NPI number?
William B. Guyol, MD's National Provider Identifier (NPI) is 1396738019, issued on Aug 28, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William B. Guyol, MD located?
The NPPES record lists a practice address at 1035 Bellevue Ave, Saint Louis, MO, 63117. Phone: (314) 646-7015. Providers update this record themselves, so call before visiting.
How can I verify William B. Guyol, MD's license?
NPPES lists Missouri license number R2D06, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.