Derek Ernest Byers, MD
Pulmonary Disease Physician · Saint Louis, MO
Derek Ernest Byers, MD is a pulmonary disease physician with a practice address in Saint Louis, Missouri, and NPI 1407074701, issued on Apr 23, 2007. Check the license (Missouri 2006032131, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Derek Ernest Byers
- Credential
- MD
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- 2006032131 MO
Self-reported in NPPES; status is on the state search - Practice location
- 4921 Parkview PL, Saint Louis, MO 63110
- Phone
- (314) 454-8766
- Enumerated
- Apr 23, 2007
- Record last updated
- Apr 15, 2025
- Fax
- (314) 454-5571
- Medicaid ID
- 204041305 MO
- Medicare enrollment
- Enrolled (PECOS I20070706000092); accepts Medicare assignment
- Medical or professional school
- University Of Texas Southwestern Medical School At Dallas, 2001
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 332 in Missouri → Look up another NPI →
Also registered at 4921 Parkview PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Homaa Ahmad, MDCardiovascular Disease Physician1477635092
Verify Derek Ernest Byers 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 2006032131Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.6 times the Medicare Part D claims of the average pulmonary disease physician in 2024
5,079 Medicare Part D claims for 247 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 17 claims were for opioids.
Most prescribed
- Sulfamethoxazole-Trimethoprim620 claims
- Acyclovir521 claims
- Prednisone434 claims
- Azithromycin433 claims
- Pantoprazole Sodium335 claims
- Tacrolimus331 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.
Bills Medicare through one group practice
- Washington UniversitySaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Derek Ernest Byers among 332 pulmonary disease physician records in Missouri
Derek Ernest Byers, MD is one of 332 pulmonary disease physician records with a practice address in Missouri. 85% 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 50% of them.
- NPI issued2007 · 50% of these records are older, 39% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2001 · median 2003 among the 246 with a school on file
- Record last updated2025 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in Missouri
There are 332 pulmonary disease physician records in Missouri.
All 332 in Missouri → Every provider in Saint Louis → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Leonidas Carayannopoulos, MDSaint Louis, MO 631101043236367
- Murali Chakinala, MDSaint Louis, MO 631101407872724
- Jonathan Green, MDSaint Louis, MO 631101033140553
- Ramsey Hachem, MDSaint Louis, MO 631101891711016
- Jeffrey Haspel, MDSaint Louis, MO 631101376578344
- Warren Isakow, MDSaint Louis, MO 631101285607341
- Marin Kollef, MDSaint Louis, MO 631101326077165
- Janet Lee, MDSaint Louis, MO 631101912979824
Common questions
What is Derek Ernest Byers, MD's NPI number?
Derek Ernest Byers, MD's National Provider Identifier (NPI) is 1407074701, issued on Apr 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Derek Ernest Byers, MD located?
The NPPES record lists a practice address at 4921 Parkview PL, Saint Louis, MO, 63110. Phone: (314) 454-8766. Providers update this record themselves, so call before visiting.
How can I verify Derek Ernest Byers, MD's license?
NPPES lists Missouri license number 2006032131, 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.
How much does Derek Ernest Byers, MD prescribe under Medicare Part D?
In 2024, Derek Ernest Byers, MD had 5,079 Medicare Part D claims for 247 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. 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.