Dr. James A. Groff, DO
- Medicare services, 2024
- 1,490
- Medicare patients, 2024
- 571
- Part D claims, 2024
- 2,015
- Publications
- 1
- Hospital affiliations
- 4
- Practice address
- 555 North Duke Street, Lancaster, PA 17602
- Practice phone
- Call (717) 544-5511
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Groff's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. James A. Groff is a nephrologist in Lancaster, Pennsylvania
Dr. Groff practices at Lancaster General Hospital in Lancaster, Pennsylvania, part of University of Pennsylvania.
Dr. Groff's NPI, 1912959107, was assigned on May 16, 2006. Dr. Groff graduated from Pcom in 1991. Dr. Groff holds Pennsylvania license OS-007680-L.
- NPI
- 1912959107NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0547179004
- NPI enumeration date
- May 16, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (717) 544-5511
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James A. Groff practices at Lancaster General Hospital in Lancaster, Pennsylvania
Dr. Groff's primary practice is Lancaster General Hospital, at 555 North Duke Street, Lancaster, PA 17602 in Lancaster County. The practice phone is (717) 544-5511.
- Lancaster General Hospital555 North Duke Street, Lancaster, PA 17602 · Lancaster CountyPhone(717) 544-5511
Source: Dmand AI Affiliation Data
Dr. James A. Groff is affiliated with 7 sites of care and 1 medical group
Dr. Groff's primary practice is Lancaster General Hospital in Lancaster, Pennsylvania, part of University of Pennsylvania. Dr. Groff is also affiliated with Penn State Health Lancaster Medical Center. The medical group on file is Hypertension & Kidney Specialists. Dmand AI also links Dr. Groff to 2 more hospitals, 2 dialysis centers and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James A. Groff's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Groff practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lancaster General Hospital | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James A. Groff is one of 552 nephrologists in Pennsylvania
Nephrology is Dr. Groff's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Groff is board certified in internal medicine by the AOA Board of Internal Medicine. Dr. Groff is licensed in Pennsylvania.
Specialties and state licenses
- Nephrology, PennsylvaniaPrimary
Clinical focus
Dmand AI lists acute kidney failure, aneurysm, chronic diabetes, chronic hypertension, chronic kidney disease, fluid and electrolyte imbalances and tobacco use among the conditions Dr. Groff treats.
Nephrologists near Dr. Groff
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. James A. Groff billed Medicare for 1,490 services in 2024
CMS data shows 1,490 Medicare services from Dr. Groff across 14 procedure codes in 2024, for 571 Medicare patients. Medicare paid $119,711 for them.
Dr. Groff's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8522024: 8915%
- Other services
- 2023: 02024: 372
- Tests and treatments
- 2023: 2072024: 2003%
- Lab and pathology
- 2023: 162024: 2769%
Where Dr. Groff's Medicare services took place, 2024
- In an office1,09073%
- In a facility40027%
Dr. Groff compared with the Pennsylvania median for nephrologists, 2024
- Dr. Groff
- Pennsylvania median
- Medicare services
- 1,490vs 77293% above
- Medicare patients
- 571vs 2752.1 times
- Part D claims
- 1,815vs 5523.3 times
Medians across 548 nephrologists in Pennsylvania with Dmand AI profiles that report each measure.
Dr. Groff's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Groff?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Groff and other nephrologists in Pennsylvania.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James A. Groff treated 571 Medicare patients in 2024, average age 76
CMS counts 571 Medicare patients who saw Dr. Groff in 2024. The largest group is 75 to 84, with 205 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 12% are also on Medicaid. Their average risk score is 3.01, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Groff's median patient age at 74, with 41% women.
Dr. Groff's Medicare patients by age, 2024
Dr. Groff's Medicare patients by sex, 2024
- Women25044%
- Men32156%
Chronic conditions among Dr. Groff's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes53%
- Arthritis47%
- Ischemic heart disease46%
- Heart failure43%
- Atrial fibrillation36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Groff's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women41%
- Men59%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James A. Groff wrote 2,015 Medicare Part D claims in 2024
In 2024, Dr. Groff wrote 2,015 Medicare Part D claims for 670 patients. 96% of them were for generic drugs. CMS names the drug for 1,815 of them, across 38 drugs with 11 or more claims each, at $49,330 in total drug cost. In 2023, CMS named 1,562 claims across 32 drugs.
Dr. Groff's Part D claims by kind of drug, 2024
- Generic1,930 claims96%
- Brand-name85 claims4%
Dr. Groff's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Groff's Part D claims, 2024
- Antibiotics1%20 of 2,015 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,5622024: 1,81516%
Drugs named by CMS: 38 in 2024, 32 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. James A. Groff takes part in Medicare
Dr. Groff accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. James A. Groff has 1 publication on record
Dmand AI links 1 paper to Dr. Groff.
Recent publications by Dr. Groff
See who Dr. Groff researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Groff works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. James A. Groff received $906 in industry payments from 2016 to 2025
CMS Open Payments shows 25 general payments to Dr. Groff from 15 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $257.
General payments to Dr. Groff by program year, 2016 to 2025
Companies that paid Dr. Groff the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James A. Groff has 1 award and honors on record
Dmand AI lists 1 award for Dr. Groff, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Groff
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. James A. Groff graduated from Pcom
Dr. Groff graduated from Pcom in 1991. Dr. Groff is a member of AOA.
- Medical school
- Board certified in internal medicine
- Board certified in nephrology
- Board certified in 1992 - 2026
Source: Dmand AI Professional Profile Data
Dr. James A. Groff accepts plans from 20 insurance carriers
Dr. Groff is in network with 20 carriers, including Aetna, Excellus BlueCross BlueShield and Elevance. Medicare plans come from the most carriers, 13. Check the plan with the practice before a visit.
- Aetna
- Excellus BlueCross BlueShield
- Elevance
- HCSC
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Capital Blue Cross
- Cigna
- +12 more carriersWith a free account
Plan types Dr. Groff accepts, by number of carriers
- Medicare13
- PPO13
- HMO11
- EPO5
- POS5
Source: Dmand AI Insurance Network Data
Sources for Dr. James A. Groff's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. James A. Groff
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. James A. Groff's NPI number?
Dr. James A. Groff's NPI number is 1912959107. It was assigned on May 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. James A. Groff?
Dr. James A. Groff is a nephrologist in Lancaster, Pennsylvania. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. James A. Groff practice?
Dr. Groff practices at 555 North Duke Street, Lancaster, PA 17602. Dr. Groff's primary practice is Lancaster General Hospital in Lancaster, Pennsylvania, part of University of Pennsylvania. Dmand AI also links Dr. Groff to 2 hospitals, 2 dialysis centers and 1 group practice or clinic.
What is Dr. James A. Groff's office phone number?
The practice phone on file for Dr. Groff is (717) 544-5511.
What is Dr. James A. Groff's medical license number?
Dr. Groff holds Pennsylvania license OS-007680-L.
Which hospitals is Dr. James A. Groff affiliated with?
Dr. Groff practices at Lancaster General Hospital in Lancaster, Pennsylvania. Dr. Groff is also affiliated with Penn State Health Lancaster Medical Center. Dmand AI links Dr. Groff to 2 more hospitals.
What medical group is Dr. James A. Groff part of?
Dr. Groff is linked to Hypertension & Kidney Specialists.
Does Dr. James A. Groff accept Medicare?
Yes. CMS data shows Dr. Groff billed Medicare for 1,490 services in 2024, and Dr. Groff accepts Medicare assignment.
How many Medicare patients does Dr. James A. Groff see?
CMS counts 571 Medicare patients who saw Dr. Groff in 2024, with an average age of 76.
Is Dr. James A. Groff board certified?
Yes. Dr. Groff is board certified in internal medicine by the AOA Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. James A. Groff bill to Medicare?
In 2024, Dr. Groff's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and hospital inpatient care (99232).
Where did Dr. James A. Groff go to medical school?
Dr. Groff graduated from Pcom in 1991.
What drugs does Dr. James A. Groff prescribe most?
In 2024 Medicare Part D data, Dr. Groff's most prescribed drugs by claims were Amlodipine Besylate, Furosemide and Lisinopril.
Has Dr. James A. Groff received payments from drug or device companies?
CMS Open Payments shows $906 in general payments to Dr. Groff from 15 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. James A. Groff been practicing?
Dr. Groff graduated from medical school in 1991, 35 years ago.
Does Dr. James A. Groff do research?
Dmand AI links 1 publication to Dr. Groff.
What insurance does Dr. James A. Groff accept?
Dr. Groff is in network with 20 carriers, including Aetna, Excellus BlueCross BlueShield and Elevance. Medicare plans come from the most carriers, 13. Check the plan with the practice before a visit.
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