Mark Philip Diamond, MD
Gastroenterology Physician · Baltimore, MD
Mark Philip Diamond, MD is a gastroenterology physician with a practice address in Baltimore, Maryland, and NPI 1912081019, issued on Oct 25, 2006. Check the license (Maryland D0022200, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Mark Philip Diamond
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- D0022200 MD
Self-reported in NPPES; status is on the state search - Practice location
- 9105 Franklin Square Drive, Baltimore, MD 21237
- Phone
- (410) 574-5877
- Enumerated
- Oct 25, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (410) 574-5879
- Medicare enrollment
- Enrolled (PECOS I20101217000431); accepts Medicare assignment
- Medical or professional school
- Ohio State University College Of Medicine, 1974
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 9105 Franklin Square Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vincent Martorana, DPMPodiatrist1518043199
Verify Mark Philip Diamond in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0022200Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% fewer Medicare Part D claims than the average gastroenterology physician in 2024
614 Medicare Part D claims for 288 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Sod Sulf-Potass Sulf-Mag Sulf190 claims
- Omeprazole108 claims
- Esomeprazole Magnesium38 claims
- Famotidine26 claims
- Ursodiol22 claims
- Mesalamine19 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): 21.3 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: $1,022.34
47 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, 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.
Gastroenterology Physician providers in Maryland
There are 505 gastroenterology physician records in Maryland.
Other gastroenterology physician records in Maryland
- Mohammad Abdallah, MBBSLa Plata, MD1598251282
- Maaza Abdi, M.D.Baltimore, MD1063625028
- Tsion Abdi, MDBaltimore, MD1881919637
- Hamza Abdulla, M.D.Easton, MD1437599529
- Thomas Abernathy, M.D.Catonsville, MD1538105697
- Fasika Aberra, M.D.Prince Frederick, MD1134480858
- Ruben Acosta, M.D.Silver Spring, MD1376545962
- Michael Adams, DOBethesda, MD1548757834
- Oluwasayo Adeyemo, MD/MPHAbingdon, MD1205221777
- Abdulhosein Adham, M.D.Oxon Hill, MD1710933791
Common questions
What is Mark Philip Diamond, MD's NPI number?
Mark Philip Diamond, MD's National Provider Identifier (NPI) is 1912081019, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Philip Diamond, MD located?
The NPPES record lists a practice address at 9105 Franklin Square Drive, Baltimore, MD, 21237. Phone: (410) 574-5877. Providers update this record themselves, so call before visiting.
How can I verify Mark Philip Diamond, MD's license?
NPPES lists Maryland license number D0022200, 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 Mark Philip Diamond, MD prescribe under Medicare Part D?
In 2024, Mark Philip Diamond, MD had 614 Medicare Part D claims for 288 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Mark Philip Diamond, MD's MIPS final score?
The 2023 MIPS final score is 21.3 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.