Stephen G. Diamantoni, M.D.
Family Medicine Physician · Lancaster, PA
Stephen G. Diamantoni, M.D. is a family medicine physician with a practice address in Lancaster, Pennsylvania, and NPI 1831240100, issued on Jan 15, 2007. Check the license (Pennsylvania MD029374E, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Stephen G. Diamantoni
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD029374E PA
Self-reported in NPPES; status is on the state search - Practice location
- 734 N Franklin St, Lancaster, PA 17602
- Phone
- (717) 295-2323
- Enumerated
- Jan 15, 2007
- Record last updated
- Jun 7, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (717) 295-7294
- Medicaid ID
- 0009958720001 PA
- Medicare enrollment
- Enrolled (PECOS I20100616000351); accepts Medicare assignment
- Medical or professional school
- Hahnemann University College Of Medicine, 1982
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 7,483 in Pennsylvania → Look up another NPI →
Also registered at 734 N Franklin St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Cynthia Brubaker, PACPhysician Assistant1699775098
- Hyasmine Charles, MDInternal Medicine Physician1922059526
- Christina Clark, PHYSICIAN ASSISTANTPhysician Assistant1346283868
- Howard Gerstein, MDFamily Medicine Physician1346298999
Verify Stephen G. Diamantoni in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD029374ECheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.5 times the Medicare Part D claims of the average family medicine physician in 2024
15,851 Medicare Part D claims for 1,038 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 639 claims were for opioids.
Most prescribed
- Atorvastatin Calcium1,012 claims
- Amlodipine Besylate615 claims
- Lisinopril602 claims
- Metformin Hcl574 claims
- Hydrochlorothiazide515 claims
- Omeprazole511 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): 69 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: $4,115.25
227 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 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
- Stephen G. Diamantoni MD And Associates Family Practice, P.C.Christiana, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen G. Diamantoni among 7,483 family medicine physician records in Pennsylvania
Stephen G. Diamantoni, M.D. is one of 7,483 family medicine physician records with a practice address in Pennsylvania. 79% 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 47% of them.
- NPI issued2007 · 47% of these records are older, 46% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1982 · median 2005 among the 4,529 with a school on file
- Record last updated2011 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
213 family medicine physician records list a practice address in Lancaster
They are 213 of the 5,378 NPPES records with a practice address in Lancaster, and 7,483 family medicine physician records in Pennsylvania.
All 7,483 in Pennsylvania → Every provider in Lancaster → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
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- Howard Gerstein, MDLancaster, PA 176021346298999
- Jeffrey Kirchner, DOLancaster, PA 176021104864214
- D Thais Magill, M.D.Lancaster, PA 176021932172814
- Jeffrey Martin, MDLancaster, PA 176021578501680
- Luke Morley, DOLancaster, PA 176021033196332
- Maria Perlis, M.D.Lancaster, PA 176021275582314
Common questions
What is Stephen G. Diamantoni, M.D.'s NPI number?
Stephen G. Diamantoni, M.D.'s National Provider Identifier (NPI) is 1831240100, issued on Jan 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Stephen G. Diamantoni, M.D. located?
The NPPES record lists a practice address at 734 N Franklin St, Lancaster, PA, 17602. Phone: (717) 295-2323. Providers update this record themselves, so call before visiting.
How can I verify Stephen G. Diamantoni, M.D.'s license?
NPPES lists Pennsylvania license number MD029374E, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Stephen G. Diamantoni, M.D. prescribe under Medicare Part D?
In 2024, Stephen G. Diamantoni, M.D. had 15,851 Medicare Part D claims for 1,038 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Stephen G. Diamantoni, M.D.'s MIPS final score?
The 2023 MIPS final score is 69 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.