Ronald Grenko, MD
Anatomic Pathology & Clinical Pathology Physician · Lancaster, PA
Ronald Grenko, MD is an anatomic pathology & clinical pathology physician with a practice address in Lancaster, Pennsylvania, and NPI 1861454571, issued on Apr 6, 2006. Check the license (Pennsylvania MD048891L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Ronald Grenko
- Credential
- MD
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License number
- MD048891L PA
Self-reported in NPPES; status is on the state search - Practice location
- 555 N Duke St, Lancaster, PA 17602
- Phone
- (717) 544-5511
- Enumerated
- Apr 6, 2006
- Record last updated
- Mar 30, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- 001394250 0008 PA
- Medicare enrollment
- Enrolled (PECOS I20060518000092); accepts Medicare assignment
- Medical or professional school
- University Of Cincinnati College Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 716 in Pennsylvania → Look up another NPI →
Also registered at 555 N Duke St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashraf Abou-Elella, MDAnatomic Pathology & Clinical Pathology Physician1972567626
- Joyce AbrahamCertified Registered Nurse Anesthetist1962242099
- Marie AceboRegistered Dietitian1053347757
- Nancy Adamopoulos, MDInternal Medicine Physician1003896283
- Jill Adams, MDFamily Medicine Physician1356184733
- Rebecca Adams, CRNPGerontology Nurse Practitioner1780041723
Verify Ronald Grenko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD048891LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $16.95
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.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital affiliation
- Lancaster General HospitalLancaster, PA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Ronald Grenko among 716 anatomic pathology & clinical pathology physician records in Pennsylvania
Ronald Grenko, MD 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 59% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated1985 · median 2001 among the 388 with a school on file
- Record last updated2011 · 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.
All 716 in Pennsylvania → Every provider in Lancaster → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- Ashraf Abou-Elella, MDLancaster, PA 176021972567626
- Susan Bator, M.D.Lancaster, PA 176021619940541
- Bruce King, M.D.Lancaster, PA 176021194798173
- Nicholas Milligan, M.D.Lancaster, PA 176021114332731
- Sarah Nassau, MDLancaster, PA 176021073716676
- Xingcao Nie, MDLancaster, PA 176021730458449
- Charles Romberger, M.D.Lancaster, PA 176021760422752
- Grace WeyantLancaster, PA 176021437415296
Common questions
What is Ronald Grenko, MD's NPI number?
Ronald Grenko, MD's National Provider Identifier (NPI) is 1861454571, issued on Apr 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Grenko, MD located?
The NPPES record lists a practice address at 555 N Duke St, Lancaster, PA, 17602. Phone: (717) 544-5511. Providers update this record themselves, so call before visiting.
How can I verify Ronald Grenko, MD's license?
NPPES lists Pennsylvania license number MD048891L, 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.
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.