John Mackrell, MD
Diagnostic Radiology Physician · Philadelphia, PA
John Mackrell, MD is a diagnostic radiology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1447426499, issued on Apr 30, 2008. Check the license (Pennsylvania MD437887, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- John Mackrell
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License numbers
- MD437887 PA
25MA08727800 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 3998 Red Lion Road, Philadelphia, PA 19114
- Phone
- (952) 595-1301
- Enumerated
- Apr 30, 2008
- Entity
- Type 1 · individual
Also registered at 3998 Red Lion Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gary Aaronson, DOPulmonary Disease Physician1770672040
- Anita Bajaj, MDDiagnostic Radiology Physician1831137264
- Olivia Carrasquillo, NPGerontology Nurse Practitioner1669827572
- Mark Castaldi, MDDiagnostic Radiology Physician1447275185
- Michelle Dumas, PAMedical Physician Assistant1952471682
- Debora Fineman, MDNuclear Medicine Physician1922099605
Verify John Mackrell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD437887Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
The practice group's Medicare quality score for 2023: 78.9 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).
3 hospital and facility affiliations
- Union Hospital OF Cecil CountyElkton, MD · Acute Care Hospitals4 of 5 stars
- Medstar Medical Group II LLCLeonardtown, MD
- Precision Diagnostic Radiology LLCSilver Spring, MD
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
517 diagnostic radiology physician records list a Philadelphia practice address
They are 517 of the 42,849 NPPES records with a Philadelphia practice address, and 1,996 diagnostic radiology physician records in Pennsylvania.
All 517 in Philadelphia → All 1,996 in Pennsylvania → Every provider in Philadelphia →
Other diagnostic radiology physician records in Pennsylvania
- Marvin Abdalah, MDMcKeesport, PA1902868615
- Mariam Aboian, M.D., PH.D.Philadelphia, PA1356669386
- Christopher Abraham, D.O.Pittsburgh, PA1649667932
- Jesty Abraham, DOPhiladelphia, PA1417118373
- Joanathan Abrahams, MDJohnstown, PA1629129374
- Gordon AbramsPittsburgh, PA1063484491
- Michael Acord, MDPhiladelphia, PA1457677007
- Richard Adam, MDPittsburgh, PA1649217753
- Caleigh Adams, DOErie, PA1700626462
- Margaret Adejolu, MDHershey, PA1912550724
Common questions
What is John Mackrell, MD's NPI number?
John Mackrell, MD's National Provider Identifier (NPI) is 1447426499, issued on Apr 30, 2008. An NPI identifies a provider in billing; it is not a license.
Where is John Mackrell, MD located?
The NPPES record lists a practice address at 3998 Red Lion Road, Philadelphia, PA, 19114. Phone: (952) 595-1301. Providers update this record themselves, so call before visiting.
How can I verify John Mackrell, MD's license?
NPPES lists Pennsylvania license number MD437887, 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.
What is John Mackrell, MD's Medicare quality score?
The 2023 MIPS final score is 78.9 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), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.