Am J Physiol
ConsciousnessDiuresisEating
Dr. James J. Gehrig Jr., MD
NPI1619049434PAC ID4587851092
- Medicare services, 2017
- 75
- Part D claims, 2024
- 68
- Publications
- 3
- Hospital affiliations
- 2
- Medical group
- 1
- Practice address
- 360 Rush Dr, San Marcos, CA 92078
- Practice phone
- Call (760) 528-6295
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Gehrig'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 J. Gehrig Jr. is a nephrologist in San Marcos, California
Dr. Gehrig practices at Kaiser Permanente San Marcos Medical Center in San Marcos, California, part of Kaiser Permanente.
Dr. Gehrig's NPI, 1619049434, was assigned on November 15, 2006. Dr. Gehrig graduated from VCU School of Medicine in 1978. Dr. Gehrig holds California license G42960.
NPI and contact details
- NPI
- 1619049434NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587851092
- NPI enumeration date
- November 15, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (760) 528-6295
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James J. Gehrig Jr. practices at Kaiser Permanente San Marcos Medical Center in San Marcos, California
Dr. Gehrig's primary practice is Kaiser Permanente San Marcos Medical Center, at 360 Rush Dr, San Marcos, CA 92078 in San Diego County. The practice phone is (760) 528-6295.
- Kaiser Permanente San Marcos Medical Center360 Rush Dr, San Marcos, CA 92078 · San Diego CountyPhone(760) 528-6295
Source: Dmand AI Affiliation Data
Dr. James J. Gehrig Jr. is affiliated with 2 sites of care and 1 medical group
Dr. Gehrig's primary practice is Kaiser Permanente San Marcos Medical Center in San Marcos, California, part of Kaiser Permanente. Dr. Gehrig is also affiliated with Sacramento Medical Center. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James J. Gehrig Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gehrig practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente San Marcos Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Gehrig practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across Kaiser Permanente and 6.2K+ hospitals, with verified contacts in the same login.
Dr. James J. Gehrig Jr. is one of 1,401 nephrologists in California
Nephrology is Dr. Gehrig's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Gehrig is board certified in internal medicine by the American Board of Internal Medicine. Dr. Gehrig is licensed in California.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
Nephrologists near Dr. Gehrig
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
1,401nephrologists in California
7nephrologists in San Marcos
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. James J. Gehrig Jr. billed Medicare for 75 services in 2017
CMS data shows 75 Medicare services from Dr. Gehrig across 2 procedure codes in 2017. Medicare paid $2,940 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 201775
Paid by Medicare$2,940
Procedure codes2
Dr. Gehrig's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Office and hospital visits
- 2016: 382017: 7597%
Dr. Gehrig compared with the California median for nephrologists, 2017
- Dr. Gehrig
- California median
- Medicare services
- 75vs 1,08493% below
- Part D claims
- 37vs 95596% below
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Gehrig's most billed Medicare procedure codes, 2017
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. Gehrig?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gehrig and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James J. Gehrig Jr.'s patients have a median age of 64
Across all payers, Dmand AI patient panel data puts Dr. Gehrig's median patient age at 64, with 53% women.
Dr. Gehrig's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women53%
- Men46%
Source: Dmand AI Patient Panel Data
Dr. James J. Gehrig Jr. wrote 68 Medicare Part D claims in 2024
In 2024, Dr. Gehrig wrote 68 Medicare Part D claims for 31 patients. 84% of them were for generic drugs. CMS names the drug for 37 of them, across 2 drugs with 11 or more claims each, at $478 in total drug cost. In 2019, CMS named 12 claims across 1 drug.
Part D claims, 202468
Drugs named by CMS2
Total drug cost$478
Part D patients31
Dr. Gehrig's Part D claims by kind of drug, 2024
- Generic57 claims84%
- Brand-name11 claims16%
Dr. Gehrig's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2019 to 2021
- 2019
- 2021
- Claims for drugs CMS names
- 2019: 122021: 37208%
Drugs named by CMS: 2 in 2021, 1 in 2019.
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 J. Gehrig Jr. takes part in Medicare
Dr. Gehrig 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)
For MedTech and pharma teams
Find nephrologists like Dr. Gehrig by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. James J. Gehrig Jr. has 3 publications on record
Dmand AI links 3 papers to Dr. Gehrig.
Papers3
Recent publications by Dr. Gehrig
BiopsyCarcinoma, Renal CellKidney
See who Dr. Gehrig researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gehrig 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 J. Gehrig Jr. has 1 award and honors on record
Dmand AI lists 1 award for Dr. Gehrig, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Gehrig
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. James J. Gehrig Jr. graduated from VCU School of Medicine
Dr. Gehrig graduated from VCU School of Medicine in 1978.
- Medical school
- Board certified in internal medicine
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Sources for Dr. James J. Gehrig Jr.'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 Data |
| 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 |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile 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 J. Gehrig Jr.
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 J. Gehrig Jr.'s NPI number?
Dr. James J. Gehrig Jr.'s NPI number is 1619049434. It was assigned on November 15, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. James J. Gehrig Jr.?
Dr. James J. Gehrig Jr. is a nephrologist in San Marcos, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. James J. Gehrig Jr. practice?
Dr. Gehrig practices at 360 Rush Dr, San Marcos, CA 92078. Dr. Gehrig's primary practice is Kaiser Permanente San Marcos Medical Center in San Marcos, California, part of Kaiser Permanente.
What is Dr. James J. Gehrig Jr.'s office phone number?
The practice phone on file for Dr. Gehrig is (760) 528-6295.
What is Dr. James J. Gehrig Jr.'s medical license number?
Dr. Gehrig holds California license G42960.
Which hospitals is Dr. James J. Gehrig Jr. affiliated with?
Dr. Gehrig practices at Kaiser Permanente San Marcos Medical Center in San Marcos, California. Dr. Gehrig is also affiliated with Sacramento Medical Center.
What medical group is Dr. James J. Gehrig Jr. part of?
Dr. Gehrig is linked to Southern California Permanente Medical Group.
Does Dr. James J. Gehrig Jr. accept Medicare?
Yes. CMS data shows Dr. Gehrig billed Medicare for 75 services in 2017, and Dr. Gehrig accepts Medicare assignment.
Is Dr. James J. Gehrig Jr. board certified?
Yes. Dr. Gehrig is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. James J. Gehrig Jr. bill to Medicare?
In 2017, Dr. Gehrig's most billed Medicare services were hospital inpatient care (99231) and hospital inpatient care (99232).
Show 4 more questionsShow fewer questions
Where did Dr. James J. Gehrig Jr. go to medical school?
Dr. Gehrig graduated from VCU School of Medicine in 1978.
What drugs does Dr. James J. Gehrig Jr. prescribe most?
In 2021 Medicare Part D data, Dr. Gehrig's most prescribed drugs by claims were Furosemide and Atenolol.
How long has Dr. James J. Gehrig Jr. been practicing?
Dr. Gehrig graduated from medical school in 1978, 48 years ago.
Does Dr. James J. Gehrig Jr. do research?
Dmand AI links 3 publications to Dr. Gehrig.
Selling to nephrology practices?
See nephrologists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card