NPPES file of Aug 9, 2026

John McMahon Gross, M.D.

Anatomic Pathology & Clinical Pathology Physician · Baltimore, MD

John McMahon Gross, M.D. is an anatomic pathology & clinical pathology physician with a practice address in Baltimore, Maryland, and NPI 1760748065, issued on Apr 11, 2012. Check the license (Maryland D89396, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2023 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1760748065
Name
John McMahon Gross
Credential
M.D.
Primary taxonomy
Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
License numbers
D89396 MD
66074 MN
7248 NE
Self-reported in NPPES; status is on the state search
Practice location
401 North Broadway, Baltimore, MD 21231
Phone
(410) 614-3653
Enumerated
Apr 11, 2012
Record last updated
Aug 3, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(410) 955-8208
Medicare enrollment
Enrolled (PECOS I20200721001466); may accept Medicare assignment
Medical or professional school
Creighton University School Of Medicine, 2012
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 401 North Broadway

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Natalie Banet, MDAnatomic Pathology Physician1245490119
  2. Evan Braunstein, M.D., PH.D.Hematology & Oncology Physician1194967091
  3. Helen ByrnesAcute Care Nurse Practitioner1538589528
  4. Kathryn CampionAcute Care Nurse Practitioner1659992386
  5. Patrick Forde, M.D.Hematology & Oncology Physician1467733113
  6. Amy Hacker-Prietz, PA-CPhysician Assistant1811129885

Verify John McMahon Gross in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMaryland Board of Physicians
    Search for license D89396    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Maryland license search

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The practice group's MIPS final score for 2023 (Medicare payment program): 74.4 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.

  1. Qualityout of 100 · 30% of the final score64.7
  2. Costout of 100 · 30%52.4
  3. Promoting interoperabilityout of 100 · 25%97.0
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Bills Medicare through 2 group practices

  1. Johns Hopkins UniversityBaltimore, MD
  2. Johns Hopkins UniversityBethesda, MD

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Anatomic Pathology & Clinical Pathology Physician providers in Maryland

There are 357 anatomic pathology & clinical pathology physician records in Maryland.

All 357 in Maryland → Every provider in Baltimore →

Other anatomic pathology & clinical pathology physician records in Maryland

  1. Jan Abramczuk, MDFrederick, MD1750301719
  2. Cheryl Adackapara, MDRockville, MD1073787644
  3. Sharif Ali, M.DHagerstown, MD1043417728
  4. Elizabeth Allen, MDBaltimore, MD1730179235
  5. Patricia Alli, M.D.Halethorpe, MD1265511372
  6. Gladys Lourdes Alonsozana, M.D.Baltimore, MD1457313942
  7. Kausha Amin, MDRockville, MD1548431349
  8. Robert Anders, M.D.Baltimore, MD1841254737
  9. Rennae Anderson, M.D.Columbia, MD1134109341
  10. Pedram Argani, M.D.Baltimore, MD1972567782

Common questions

What is John McMahon Gross, M.D.'s NPI number?

John McMahon Gross, M.D.'s National Provider Identifier (NPI) is 1760748065, issued on Apr 11, 2012. An NPI identifies a provider in billing; it is not a license.

Where is John McMahon Gross, M.D. located?

The NPPES record lists a practice address at 401 North Broadway, Baltimore, MD, 21231. Phone: (410) 614-3653. Providers update this record themselves, so call before visiting.

How can I verify John McMahon Gross, M.D.'s license?

NPPES lists Maryland license number D89396, 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.

What is John McMahon Gross, M.D.'s MIPS final score?

The 2023 MIPS final score is 74.4 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.