Mark R. Fantaski, MD
Internal Medicine Physician · Gibsonia, PA
Mark R. Fantaski, MD is an internal medicine physician with a practice address in Gibsonia, Pennsylvania, and NPI 1689651630, issued on Dec 29, 2005. Check the license (Pennsylvania MD048987L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Mark R. Fantaski
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD048987L PA
Self-reported in NPPES; status is on the state search - Practice location
- 5318 Ranalli Dr, Gibsonia, PA 15044
- Phone
- (724) 449-9355
- Enumerated
- Dec 29, 2005
- Record last updated
- Jan 14, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (724) 449-2727
- Medicare enrollment
- Enrolled (PECOS I20041117000820); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 5318 Ranalli Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Virginia Balderston, M.D.Internal Medicine Physician1487632311
- Joseph Calhoun, D.O.Internal Medicine Physician1558346114
- Mark Dosch, D.O.Internal Medicine Physician1801851167
- Holly Gongaware, CRNPNurse Practitioner1982245965
- Katherine HowarthNurse Practitioner1891545513
- Allison Shelton, PA-CPhysician Assistant1821572306
Verify Mark R. Fantaski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD048987LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.7 times the Medicare Part D claims of the average internal medicine physician in 2024
11,608 Medicare Part D claims for 1,027 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 179 claims were for opioids.
Most prescribed
- Atorvastatin Calcium716 claims
- Rosuvastatin Calcium687 claims
- Amlodipine Besylate685 claims
- Losartan Potassium594 claims
- Lisinopril418 claims
- Levothyroxine Sodium396 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): 78.5 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: $244.18
4 payments; by number, the most common kind was food and beverage; the largest payer was Phathom Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Upmc Community Medicine IncPittsburgh, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark R. Fantaski among 7,300 internal medicine physician records in Pennsylvania
Mark R. Fantaski, MD is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% 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, 91% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1990 · median 2008 among the 4,208 with a school on file
- Record last updated2008 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 internal medicine physician records list a practice address in Gibsonia
They are 11 of the 386 NPPES records with a practice address in Gibsonia, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Gibsonia → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Virginia Balderston, M.D.Gibsonia, PA 150441487632311
- Joseph Calhoun, D.O.Gibsonia, PA 150441558346114
- Mary Certo-Rossetti, DOGibsonia, PA 150441467428094
- Susan Deakin, DOGibsonia, PA 150441174596423
- Mark Dosch, D.O.Gibsonia, PA 150441801851167
- David Figucia, MDGibsonia, PA 150441134111305
- Kathleen Holleran, MDGibsonia, PA 150441376508382
- Gary Lemoncelli, MDGibsonia, PA 150441548250947
Common questions
What is Mark R. Fantaski, MD's NPI number?
Mark R. Fantaski, MD's National Provider Identifier (NPI) is 1689651630, issued on Dec 29, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark R. Fantaski, MD located?
The NPPES record lists a practice address at 5318 Ranalli Dr, Gibsonia, PA, 15044. Phone: (724) 449-9355. Providers update this record themselves, so call before visiting.
How can I verify Mark R. Fantaski, MD's license?
NPPES lists Pennsylvania license number MD048987L, 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 Mark R. Fantaski, MD prescribe under Medicare Part D?
In 2024, Mark R. Fantaski, MD had 11,608 Medicare Part D claims for 1,027 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Mark R. Fantaski, MD's MIPS final score?
The 2023 MIPS final score is 78.5 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.