William D. Drinnon, MD
Internal Medicine Physician · Chattanooga, TN
William D. Drinnon, MD is an internal medicine physician with a practice address in Chattanooga, Tennessee, and NPI 1831174168, issued on Dec 9, 2005. Check the license (Tennessee 22164, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William D. Drinnon
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 22164 TN
Self-reported in NPPES; status is on the state search - Practice location
- 3370 Jenkins Road, Chattanooga, TN 37421
- Phone
- (423) 648-8005
- Enumerated
- Dec 9, 2005
- Record last updated
- Jan 15, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (423) 648-8006
- Medicare enrollment
- Enrolled (PECOS I20100901000284); accepts Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,596 in Tennessee → Look up another NPI →
Also registered at 3370 Jenkins Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Peters, MDInternal Medicine Physician1912982711
- Jeffrey Rogers, DOInternal Medicine Physician1174509681
Verify William D. Drinnon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 22164Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% more Medicare Part D claims than the average internal medicine physician in 2024
6,009 Medicare Part D claims for 551 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Amlodipine Besylate633 claims
- Levothyroxine Sodium327 claims
- Losartan Potassium268 claims
- Atorvastatin Calcium243 claims
- Lisinopril240 claims
- Omeprazole211 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): 94.7 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).
Industry payments in 2024: $145.58
1 payment: food and beverage; the largest payer was Bard Peripheral Vascular, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Beacon Health Alliance PCChattanooga, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William D. Drinnon among 2,596 internal medicine physician records in Tennessee
William D. Drinnon, MD is one of 2,596 internal medicine physician records with a practice address in Tennessee. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 85% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1989 · median 2003 among the 1,705 with a school on file
- Record last updated2009 · 56% 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 Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
192 internal medicine physician records list a practice address in Chattanooga
They are 192 of the 7,377 NPPES records with a practice address in Chattanooga, and 2,596 internal medicine physician records in Tennessee.
All 2,596 in Tennessee → Every provider in Chattanooga → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- David HeltonChattanooga, TN 374211235195868
- Tanja Holsey, MDChattanooga, TN 374211871567388
- Jonathan Kerley, DOChattanooga, TN 374211568442689
- Raphael Lanade, MDChattanooga, TN 374211427081884
- Mark McKenzie, MDChattanooga, TN 374211821064122
- Richard Peters, MDChattanooga, TN 374211912982711
Common questions
What is William D. Drinnon, MD's NPI number?
William D. Drinnon, MD's National Provider Identifier (NPI) is 1831174168, issued on Dec 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William D. Drinnon, MD located?
The NPPES record lists a practice address at 3370 Jenkins Road, Chattanooga, TN, 37421. Phone: (423) 648-8005. Providers update this record themselves, so call before visiting.
How can I verify William D. Drinnon, MD's license?
NPPES lists Tennessee license number 22164, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William D. Drinnon, MD prescribe under Medicare Part D?
In 2024, William D. Drinnon, MD had 6,009 Medicare Part D claims for 551 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is William D. Drinnon, MD's MIPS final score?
The 2023 MIPS final score is 94.7 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.