James A. Groff, DO
Nephrology Physician · Lancaster, PA
James A. Groff, DO is a nephrology physician with a practice address in Lancaster, Pennsylvania, and NPI 1912959107, issued on May 16, 2006. Check the license (Pennsylvania OS-007680-L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- James A. Groff
- Credential
- DO
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- OS-007680-L PA
Self-reported in NPPES; status is on the state search - Practice location
- 2112 Harrisburg Pike, Lancaster, PA 17604
- Phone
- (717) 544-3232
- Enumerated
- May 16, 2006
- Record last updated
- Dec 2, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (717) 544-3233
- Medicaid ID
- 1585190 PA
- Medicare enrollment
- Enrolled (PECOS I20040407000639); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 1991
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 651 in Pennsylvania → Look up another NPI →
Also registered at 2112 Harrisburg Pike
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan Ciampaglia, DONephrology Physician1205888492
- Jeffery Levine, DONephrology Physician1336191071
- Jeffrey Martin, MDNephrology Physician1558313205
- Kevin Miller, DPMPodiatrist1740222629
- Charles Rodenberger, MDNephrology Physician1699727982
- Joanne Van Dask, CRNPNephrology Physician1093767964
Verify James A. Groff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS-007680-LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% more Medicare Part D claims than the average nephrology physician in 2024
2,015 Medicare Part D claims for 670 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Amlodipine Besylate252 claims
- Furosemide187 claims
- Lisinopril152 claims
- Spironolactone120 claims
- Losartan Potassium119 claims
- Doxazosin Mesylate106 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: $208.13
5 payments; by number, the most common kind was food and beverage; the largest payer was Mallinckrodt Hospital Products Inc. The 8,230 providers of this specialty with any payment received $3,091.37 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
- Nephrology Associates OF Lancaster, LtdStevens, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James A. Groff among 651 nephrology physician records in Pennsylvania
James A. Groff, DO is one of 651 nephrology physician records with a practice address in Pennsylvania. 84% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 51% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1991 · median 2001 among the 468 with a school on file
- Record last updated2010 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Pennsylvania
There are 651 nephrology physician records in Pennsylvania.
All 651 in Pennsylvania → Every provider in Lancaster → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Doreen Bett, D.O.Lancaster, PA 176041386770501
- Susan Ciampaglia, DOLancaster, PA 176041205888492
- Jeffery Levine, DOLancaster, PA 176041336191071
- Jeffrey Martin, MDLancaster, PA 176041558313205
- Charles Rodenberger, MDLancaster, PA 176041699727982
- David Somerman, DOLancaster, PA 176041255586178
- Joanne Van Dask, CRNPLancaster, PA 176041093767964
- Marc Weiner, MDLancaster, PA 176041073565263
Common questions
What is James A. Groff, DO's NPI number?
James A. Groff, DO's National Provider Identifier (NPI) is 1912959107, issued on May 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James A. Groff, DO located?
The NPPES record lists a practice address at 2112 Harrisburg Pike, Lancaster, PA, 17604. Phone: (717) 544-3232. Providers update this record themselves, so call before visiting.
How can I verify James A. Groff, DO's license?
NPPES lists Pennsylvania license number OS-007680-L, 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 James A. Groff, DO prescribe under Medicare Part D?
In 2024, James A. Groff, DO had 2,015 Medicare Part D claims for 670 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.