Greg Harrison Fischer, DO
Emergency Medicine Physician · Allentown, PA
Greg Harrison Fischer, DO is an emergency medicine physician with a practice address in Allentown, Pennsylvania, and NPI 1851886923, issued on Jun 29, 2018. Check the license (Pennsylvania OS020331, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Greg Harrison Fischer
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- OS020331 PA
OT018471 PA
0102207061 VA
Self-reported in NPPES; status is on the state search - Practice location
- 1200 S Cedar Crest Blvd, Allentown, PA 18103
- Phone
- (484) 862-3232
- Enumerated
- Jun 29, 2018
- Record last updated
- Aug 10, 2023
- Medicare enrollment
- Enrolled (PECOS I20231005001625); accepts Medicare assignment
- Medical or professional school
- Lake Erie Col Of Osteopathic Medicine, Bradenton, 2018
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,911 in Pennsylvania → Look up another NPI →
Also registered at 1200 S Cedar Crest Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Aamir Ahmed, M.D.Hospitalist Physician1053752147
Verify Greg Harrison Fischer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS020331Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average emergency medicine physician in 2024
71 Medicare Part D claims for 56 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Cephalexin12 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: $14.58
1 payment: food and beverage; the largest payer was Pfizer Inc. The 12,335 providers of this specialty with any payment received $953.79 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
- Lehigh Valley Physician GroupAllentown, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Greg Harrison Fischer among 3,911 emergency medicine physician records in Pennsylvania
Greg Harrison Fischer, DO is one of 3,911 emergency medicine physician records with a practice address in Pennsylvania. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 71% of them.
- NPI issued2018 · 71% of these records are older, 25% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2018 · median 2013 among the 2,231 with a school on file
- Record last updated2023 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
162 emergency medicine physician records list a practice address in Allentown
They are 162 of the 5,904 NPPES records with a practice address in Allentown, and 3,911 emergency medicine physician records in Pennsylvania.
All 3,911 in Pennsylvania → Every provider in Allentown → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Emily Barbee, MDAllentown, PA 181031326088907
- Lisa Ann Comperatore, MDAllentown, PA 181031932144052
- Matthew Cook, D.O.Allentown, PA 181031902844186
- Danielle Deitrick, DOAllentown, PA 181031144257544
- Terrence Goyke, DOAllentown, PA 181031184660136
- Steven Johnson, D.O.Allentown, PA 181031710965702
- Donald Jones, DOAllentown, PA 181031114969334
- Kenneth Katz, MDAllentown, PA 181031932173226
Common questions
What is Greg Harrison Fischer, DO's NPI number?
Greg Harrison Fischer, DO's National Provider Identifier (NPI) is 1851886923, issued on Jun 29, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Greg Harrison Fischer, DO located?
The NPPES record lists a practice address at 1200 S Cedar Crest Blvd, Allentown, PA, 18103. Phone: (484) 862-3232. Providers update this record themselves, so call before visiting.
How can I verify Greg Harrison Fischer, DO's license?
NPPES lists Pennsylvania license number OS020331, 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 Greg Harrison Fischer, DO prescribe under Medicare Part D?
In 2024, Greg Harrison Fischer, DO had 71 Medicare Part D claims for 56 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.
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.