Lester Bowser, M.D.
Gastroenterology Physician · Baltimore, MD
Lester Bowser, M.D. is a gastroenterology physician with a practice address in Baltimore, Maryland, and NPI 1043206873, issued on Sep 27, 2005. Check the license (Maryland D0052005, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Lester Bowser
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- D0052005 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1838 Greene Tree RD, Baltimore, MD 21208
- Phone
- (410) 602-7782
- Enumerated
- Sep 27, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (410) 602-2438
- Medicare enrollment
- Enrolled (PECOS I20050715000347); accepts Medicare assignment
- Medical or professional school
- University Of Pittsburgh School Of Medicine, 1994
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 505 in Maryland → Look up another NPI →
Also registered at 1838 Greene Tree RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Bruce Berger, M.D.Urology Physician1558324657
- Eric Blum, M.D.Gastroenterology Physician1447466289
- Jeffrey Brauer, M.D.Pulmonary Disease Physician1306931027
Verify Lester Bowser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0052005Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% fewer Medicare Part D claims than the average gastroenterology physician in 2024
384 Medicare Part D claims for 137 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Pantoprazole Sodium105 claims
- Famotidine83 claims
- Omeprazole24 claims
- Esomeprazole Magnesium19 claims
- Lubiprostone19 claims
- Creon18 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 practice group's MIPS final score for 2023 (Medicare payment program): 80.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $118.01
4 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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
- Medstar Medical Group II LLCBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lester Bowser among 505 gastroenterology physician records in Maryland
Lester Bowser, M.D. is one of 505 gastroenterology physician records with a practice address in Maryland. 81% 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, 84% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1994 · median 2002 among the 344 with a school on file
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Maryland
There are 505 gastroenterology physician records in Maryland.
All 505 in Maryland → Every provider in Baltimore → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Eric Blum, M.D.Baltimore, MD 212081447466289
- Steven Epstein, MDBaltimore, MD 212081811173636
- Ronald Ginsberg, MDBaltimore, MD 212081801877758
- Todd Heller, M.D.Baltimore, MD 212081053305763
- Loc Le, M.D.Baltimore, MD 212081194710517
- Kenolisa Onwueme, M.D., PH.D.Baltimore, MD 212081336283720
- Michael Siuta, M.D.Baltimore, MD 212081740274281
- Lila Tarmin, M.D.Baltimore, MD 212081669466108
Common questions
What is Lester Bowser, M.D.'s NPI number?
Lester Bowser, M.D.'s National Provider Identifier (NPI) is 1043206873, issued on Sep 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Lester Bowser, M.D. located?
The NPPES record lists a practice address at 1838 Greene Tree RD, Baltimore, MD, 21208. Phone: (410) 602-7782. Providers update this record themselves, so call before visiting.
How can I verify Lester Bowser, M.D.'s license?
NPPES lists Maryland license number D0052005, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Lester Bowser, M.D. prescribe under Medicare Part D?
In 2024, Lester Bowser, M.D. had 384 Medicare Part D claims for 137 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Lester Bowser, M.D.'s MIPS final score?
The 2023 MIPS final score is 80.2 of 100, reported for the practice group. 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.