NPPES file of Aug 9, 2026

Michael Shaun Nagar, M.D.

Anatomic Pathology & Clinical Pathology Physician · King Of Prussia, PA

Michael Shaun Nagar, M.D. is an anatomic pathology & clinical pathology physician with a practice address in King Of Prussia, Pennsylvania, and NPI 1588996847, issued on Feb 10, 2010. Check the license (Pennsylvania MD438907, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1588996847
Name
Michael Shaun Nagar
Credential
M.D.
Primary taxonomy
Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
License number
MD438907 PA
Self-reported in NPPES; status is on the state search
Practice location
211 S Gulph RD Ste 200, King Of Prussia, PA 19406
Phone
(610) 382-5900
Enumerated
Feb 10, 2010
Record last updated
Apr 28, 2025
Medicare enrollment
Enrolled (PECOS I20251022004834); accepts Medicare assignment
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 211 S Gulph RD Ste 200

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

  1. Stephen Arrigo, M.D.Radiation Oncology Physician1467496877
  2. Estella Graeffe, MDRadiation Oncology Physician1750332300

Verify Michael Shaun Nagar in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
    Search for license MD438907
    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 Pennsylvania license search

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The practice group's MIPS final score for 2023 (Medicare payment program): 100 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. Qualitynot scored (reweighted)
  2. Costnot scored (reweighted)
  3. Promoting interoperabilityout of 100 · 25%100.0
  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).

Industry payments in 2024: $21.87

1 payment: food and beverage; the largest payer was Roche Diagnostics Corporation. The 2,607 providers of this specialty with any payment received $3,565.00 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Michael Nagar$21.87
  2. Specialty average$3,565.00

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

  1. The Centers For Advanced Urology LLPWake Forest, NC

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

Michael Shaun Nagar among 716 anatomic pathology & clinical pathology physician records in Pennsylvania

Michael Shaun Nagar, M.D. is one of 716 anatomic pathology & clinical pathology physician records with a practice address in Pennsylvania. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 64% of them.

  • NPI issued2010 · 64% of these records are older, 32% newer
  • In a Medicare fileYes · 62% of these records are
  • In the CMS Doctors and Clinicians fileYes · 54% of these records are
  • Graduated2004 · median 2001 among the 388 with a school on file
  • Record last updated2025 · 66% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Anatomic Pathology & Clinical Pathology Physician providers in Pennsylvania

There are 716 anatomic pathology & clinical pathology physician records in Pennsylvania.

The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes

  1. Michelle HeaynEast Norriton, PA 194031447766910
  2. John Lininger, MDEast Norriton, PA 194031720042823
  3. Donald Nicklas, M.D.Audubon, PA 194031952442055
  4. Patricia Perosio, MDEast Norriton, PA 194031770547358
  5. Philip Klenn, MDEast Norriton, PA 194011710170865
  6. Junyi Lei, MDCollegeville, PA 194261689606659
  7. Rongshan Li, MDCollegeville, PA 194261750335667
  8. Hua-Fang LinWest Chester, PA 193821043743115

Common questions

What is Michael Shaun Nagar, M.D.'s NPI number?

Michael Shaun Nagar, M.D.'s National Provider Identifier (NPI) is 1588996847, issued on Feb 10, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Michael Shaun Nagar, M.D. located?

The NPPES record lists a practice address at 211 S Gulph RD Ste 200, King Of Prussia, PA, 19406. Phone: (610) 382-5900. Providers update this record themselves, so call before visiting.

How can I verify Michael Shaun Nagar, M.D.'s license?

NPPES lists Pennsylvania license number MD438907, 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 Michael Shaun Nagar, M.D.'s MIPS final score?

The 2023 MIPS final score is 100 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.