NPPES file of Aug 9, 2026

Marc Seth Effron, M.D.

Physical Medicine & Rehabilitation Physician · King Of Prussia, PA

Marc Seth Effron, M.D. is a physical medicine & rehabilitation physician with a practice address in King Of Prussia, Pennsylvania, and NPI 1023218815, issued on Jul 20, 2007. Check the license (Pennsylvania MD433772, 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 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1023218815
Name
Marc Seth Effron
Credential
M.D.
Primary taxonomy
Physical Medicine & Rehabilitation Physician 208100000X
License number
MD433772 PA
Self-reported in NPPES; status is on the state search
Practice location
700 S Henderson RD, King Of Prussia, PA 19406
Phone
(610) 337-3111
Enumerated
Jul 20, 2007
Record last updated
Apr 6, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(610) 337-3506
Medicare enrollment
Enrolled (PECOS I20080804000419); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
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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8 nearest physical medicine & rehabilitation physician records → All 875 in Pennsylvania → Look up another NPI →

Also registered at 700 S Henderson RD

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

  1. Andrew Badulak, DOFamily Medicine Physician1225131824
  2. Susan Blackmore, OTHand Occupational Therapist1841368511
  3. Scott Davidoff, M.D.Physical Medicine & Rehabilitation Physician1053434399
  4. Marianne Dunphy, OTHand Occupational Therapist1265509640
  5. Jenifer Haines, OTHand Occupational Therapist1174730642
  6. Dena Hornung, OTHand Occupational Therapist1699982173

Verify Marc Seth Effron 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 MD433772    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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30% more Medicare Part D claims than the average physical medicine & rehabilitation physician in 2024

947 Medicare Part D claims for 233 beneficiaries, against an average of 727 among the 7,448 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 480 claims were for opioids.

  1. Marc Effron947
  2. Specialty average727

Most prescribed

  1. Gabapentin173 claims
  2. Tramadol Hcl132 claims
  3. Oxycodone-Acetaminophen119 claims
  4. Hydrocodone-Acetaminophen88 claims
  5. Pregabalin51 claims
  6. Oxycodone Hcl44 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.

Industry payments in 2024: $380.70

12 payments; by number, the most common kind was food and beverage; the largest payer was Painteq LLC. The 3,895 providers of this specialty with any payment received $1,237.86 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Marc Effron$380.70
  2. Specialty average$1,237.86

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. Roy M Lerman M D P CKing Of Prussia, PA

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

Marc Seth Effron among 875 physical medicine & rehabilitation physician records in Pennsylvania

Marc Seth Effron, M.D. is one of 875 physical medicine & rehabilitation physician records with a practice address in Pennsylvania. 63% 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 38% of them.

  • NPI issued2007 · 38% of these records are older, 52% newer
  • In a Medicare fileYes · 63% of these records are
  • In the CMS Doctors and Clinicians fileYes · 52% of these records are
  • Graduated2003 · median 2005 among the 451 with a school on file
  • Record last updated2021 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208100000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Physical Medicine & Rehabilitation Physician providers in Pennsylvania

There are 875 physical medicine & rehabilitation physician records in Pennsylvania.

All 875 in Pennsylvania → Every provider in King Of Prussia → Physical Medicine & Rehabilitation Physician nationwide →

The 8 physical medicine & rehabilitation physician records with the nearest ZIP codes

  1. Scott Davidoff, M.D.King Of Prussia, PA 194061053434399
  2. Farzad Karkvandeian, DOKing Of Prussia, PA 194061669819132
  3. Roy Lerman, MDKing Of Prussia, PA 194061588767180
  4. Eric Liu, DOKing Of Prussia, PA 194061568998375
  5. Denis Rogers, MDKing Of Prussia, PA 194061154491785
  6. Jeffery Rowe, MDKing Of Prussia, PA 194061407959000
  7. Lance ReccoppaEagleville, PA 194031609497486
  8. Mathew Abraham, MDBlue Bell, PA 194221083818512

Common questions

What is Marc Seth Effron, M.D.'s NPI number?

Marc Seth Effron, M.D.'s National Provider Identifier (NPI) is 1023218815, issued on Jul 20, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Marc Seth Effron, M.D. located?

The NPPES record lists a practice address at 700 S Henderson RD, King Of Prussia, PA, 19406. Phone: (610) 337-3111. Providers update this record themselves, so call before visiting.

How can I verify Marc Seth Effron, M.D.'s license?

NPPES lists Pennsylvania license number MD433772, 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 Marc Seth Effron, M.D. prescribe under Medicare Part D?

In 2024, Marc Seth Effron, M.D. had 947 Medicare Part D claims for 233 beneficiaries; the average among physical medicine & rehabilitation physician prescribers was 727. Part D covers Medicare prescriptions only.

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.