Peter Edwin Darwin, MD
Gastroenterology Physician · Baltimore, MD
Peter Edwin Darwin, MD is a gastroenterology physician with a practice address in Baltimore, Maryland, and NPI 1649231481, issued on Mar 31, 2006. Check the license (Maryland D42781, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Peter Edwin Darwin
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- D42781 MD
Self-reported in NPPES; status is on the state search - Practice location
- 22 S Greene St, Baltimore, MD 21201
- Phone
- (410) 328-8729
- Enumerated
- Mar 31, 2006
- Record last updated
- Dec 27, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (410) 328-8315
- Medicaid IDs
- 034348300 DC
3810000273 WV
1649231481 DE
220171200 MD - Medicare enrollment
- Enrolled (PECOS I20101213000693); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 505 in Maryland → Look up another NPI →
Also registered at 22 S Greene St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Peter Edwin Darwin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D42781Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average gastroenterology physician in 2024
215 Medicare Part D claims for 116 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Gavilyte-G31 claims
- Ursodiol27 claims
- Pantoprazole Sodium23 claims
- Peg-3350 And Electrolytes18 claims
- Creon17 claims
- Sod Sulf-Potass Sulf-Mag Sulf13 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.
Industry payments in 2024: $58.50
3 payments; by number, the most common kind was food and beverage; the largest payer was Phathom Pharmaceuticals, 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 2 group practices
- Kaiser Foundation Health Plan OF The Mid Atlantic States, IncBaltimore, MD
- University OF Maryland Physicians PABaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter Edwin Darwin among 505 gastroenterology physician records in Maryland
Peter Edwin Darwin, MD 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 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 46% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1990 · median 2002 among the 344 with a school on file
- Record last updated2010 · 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
- Aline Charabaty-PishvaianBaltimore, MD 212011285619080
- Raymond Cross, MDBaltimore, MD 212011447214507
- George Fantry, M.D.Baltimore, MD 212011043272610
- Eric Goldberg, M.D.Baltimore, MD 212011083664312
- Eduardo Gonzalez-Velez, MDBaltimore, MD 212011205913373
- Sonia Gosain, MDBaltimore, MD 212011306049002
- Bruce Greenwald, M.D.Baltimore, MD 212011801842018
- Sandra Quezada, MDBaltimore, MD 212011609911387
Common questions
What is Peter Edwin Darwin, MD's NPI number?
Peter Edwin Darwin, MD's National Provider Identifier (NPI) is 1649231481, issued on Mar 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Peter Edwin Darwin, MD located?
The NPPES record lists a practice address at 22 S Greene St, Baltimore, MD, 21201. Phone: (410) 328-8729. Providers update this record themselves, so call before visiting.
How can I verify Peter Edwin Darwin, MD's license?
NPPES lists Maryland license number D42781, 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 Peter Edwin Darwin, MD prescribe under Medicare Part D?
In 2024, Peter Edwin Darwin, MD had 215 Medicare Part D claims for 116 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.