James Groff, DO
NPI 1912959107 · Nephrology Physician · Lancaster, PA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Groff, DO is a Nephrology Physician provider in Lancaster, PA (NPI 1912959107).
Provider details
- NPI number
- 1912959107
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- OS-007680-L (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,490 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 387 | $98 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 372 | $16 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 234 | $75 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 173 | $329 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 67 | $123 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 252 | 103 |
| Furosemide | 187 | 86 |
| Lisinopril | 152 | 70 |
| Spironolactone | 120 | 47 |
| Losartan Potassium | 119 | 57 |
| Doxazosin Mesylate | 106 | 48 |
| Carvedilol | 98 | 41 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$208 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-16
- Last updated
- 2010-12-02
Frequently asked questions
- What is James Groff's NPI number?
- James Groff's National Provider Identifier (NPI) is 1912959107, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Groff's specialty?
- James Groff is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is James Groff located?
- James Groff's practice location on file with NPPES is 2112 Harrisburg Pike, Lancaster, PA 17604-3200.
- What is James Groff's phone number?
- The practice phone number listed in the NPPES registry for James Groff is (717) 544-3232.
- Does James Groff accept Medicare?
- James Groff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Groff's NPI active?
- Yes — James Groff's NPI (1912959107) is active in the NPPES registry as of the last update on 2010-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.