NPPES file of Aug 9, 2026

Elwyn C. Clark, DO

Critical Care Medicine (Internal Medicine) Physician · Chattanooga, TN

Elwyn C. Clark, DO is a critical care medicine (internal medicine) physician with a practice address in Chattanooga, Tennessee, and NPI 1083875900, issued on Jun 23, 2008. Check the license on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1083875900
Name
Elwyn C. Clark
Credential
DO
Primary taxonomy
Critical Care Medicine (Internal Medicine) Physician 207RC0200X
License numbers
247501-1 NY
247501 NY
Self-reported in NPPES; status is on the state search
Practice location
979 E 3RD St Ste C735, Chattanooga, TN 37403
Phone
(423) 778-9101
Enumerated
Jun 23, 2008
Record last updated
Jul 6, 2026
Medicare enrollment
Enrolled (PECOS I20200820001184); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest critical care medicine (internal medicine) physician records → All 88 in Tennessee → Look up another NPI →

Also registered at 979 E 3RD St Ste C735

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Jeremy Greenberg, M.D.Critical Care Medicine (Internal Medicine) Physician1609142041
  2. Adam Humphrey, PA-CMedical Physician Assistant1326328303
  3. Anne Mainardi, M.D.Pulmonary Disease Physician1093151367
  4. Radhika Shah, M.D.Pulmonary Disease Physician1699065722

Verify Elwyn C. Clark in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTennessee Board of Medical ExaminersCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Tennessee license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Erlanger HealthSignal Mountain, TN

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Elwyn C. Clark among 88 critical care medicine (internal medicine) physician records in Tennessee

Elwyn C. Clark, DO is one of 88 critical care medicine (internal medicine) physician records with a practice address in Tennessee. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 48% of them.

  • NPI issued2008 · 48% of these records are older, 47% newer
  • In a Medicare fileYes · 89% of these records are
  • In the CMS Doctors and Clinicians fileYes · 77% of these records are
  • Graduated2004 · median 2008 among the 68 with a school on file
  • Record last updated2026 · 38% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Critical Care Medicine (Internal Medicine) Physician providers in Tennessee

There are 88 critical care medicine (internal medicine) physician records in Tennessee.

All 88 in Tennessee → Every provider in Chattanooga → Critical Care Medicine (Internal Medicine) Physician nationwide →

The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes

  1. Christine Carter, MDChattanooga, TN 374031144683848
  2. Devon Gaines, MDChattanooga, TN 374031063973048
  3. Jeremy Greenberg, M.D.Chattanooga, TN 374031609142041
  4. Brookelyn Lemacks, PA-CChattanooga, TN 374031790643997
  5. Edwin Rao, MDChattanooga, TN 374031912909763
  6. Danya Ahmed, MDChattanooga, TN 374041568091965
  7. Alyssa Espinera, MDChattanooga, TN 374041265824197
  8. Jody Haddock, MDChattanooga, TN 374041588980999

Common questions

What is Elwyn C. Clark, DO's NPI number?

Elwyn C. Clark, DO's National Provider Identifier (NPI) is 1083875900, issued on Jun 23, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Elwyn C. Clark, DO located?

The NPPES record lists a practice address at 979 E 3RD St Ste C735, Chattanooga, TN, 37403. Phone: (423) 778-9101. Providers update this record themselves, so call before visiting.

How can I verify Elwyn C. Clark, DO's license?

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.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.