Dr. Ralph E. Koldinger, MD
- Medicare services, 2018
- 38
- Part D claims, 2018
- 144
- Industry payments
- $4,336
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 3941 J Street, Sacramento, CA 95819
- Practice phone
- Call (916) 454-0655
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sacramento Gastroenterology Medical Group
Medical specialty practice · Sacramento, California
Find Dr. Koldinger'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. Ralph E. Koldinger is a gastroenterologist in Sacramento, California
Dr. Koldinger practices at Sacramento Gastroenterology Medical Group in Sacramento, California.
Dr. Koldinger's NPI, 1952421703, was assigned on March 29, 2007. Dr. Koldinger holds California license G9968.
- NPI
- 1952421703NPI Registry (opens in a new tab)
- NPI enumeration date
- March 29, 2007
- NPI status
- Active
- Practice phone
- (916) 454-0655
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ralph E. Koldinger practices at 2 locations in Sacramento, California
Dr. Koldinger's primary practice is Sacramento Gastroenterology Medical Group, at 3941 J Street, Sacramento, CA 95819. The practice phone is (916) 454-0655. The NPI Registry lists Dr. Koldinger's practice address as 2825 Capitol Ave, Sacramento, CA 95816.
- Sacramento Gastroenterology Medical GroupPrimary3941 J Street, Sacramento, CA 95819Phone(916) 454-0655
- NPI Registry address2825 Capitol Ave, Sacramento, CA 95816 · Sacramento CountyPhone(916) 454-0655
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Ralph E. Koldinger is affiliated with 1 site of care and 1 medical group
Dr. Koldinger's primary practice is Sacramento Gastroenterology Medical Group in Sacramento, California. Dmand AI also links Dr. Koldinger to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Ralph E. Koldinger's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Koldinger practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sacramento Gastroenterology Medical Group | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ralph E. Koldinger is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Koldinger's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Koldinger is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Koldinger
Counts of gastroenterologists 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. Ralph E. Koldinger billed Medicare for 38 services in 2018
CMS data shows 38 Medicare services from Dr. Koldinger across 2 procedure codes in 2018, all of them office visits. Medicare paid $1,398 for them. Every service was in an office.
Dr. Koldinger's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 1352018: 3872%
- Tests and treatments
- 2017: 272018: 0100%
Dr. Koldinger compared with the California median for gastroenterologists, 2018
- Dr. Koldinger
- California median
- Medicare services
- 38vs 58694% below
- Part D claims
- 144vs 38062% below
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Koldinger's most billed Medicare procedure codes, 2018
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Koldinger and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ralph E. Koldinger's patients have a median age of 69
Across all payers, Dmand AI patient panel data puts Dr. Koldinger's median patient age at 69, with 50% women.
Dr. Koldinger's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Ralph E. Koldinger wrote 144 Medicare Part D claims in 2018
In 2018, Dr. Koldinger wrote 144 Medicare Part D claims. They cover 9 drugs, with $22,741 in total drug cost. In 2017, CMS named 334 claims across 18 drugs.
Dr. Koldinger's most prescribed drugs by claims, 2018
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, 2017 to 2018
- 2017
- 2018
- Claims for drugs CMS names
- 2017: 3342018: 14457%
Drugs named by CMS: 9 in 2018, 18 in 2017.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Ralph E. Koldinger received $4,336 in industry payments from 2016 to 2018
CMS Open Payments shows 230 general payments to Dr. Koldinger from 19 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $1,348.
General payments to Dr. Koldinger by program year, 2016 to 2018
General payments to Dr. Koldinger by kind, 2016 to 2018
- Food and beverage$4,332100%
- Education$50%
Companies that paid Dr. Koldinger the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ralph E. Koldinger'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Ralph E. Koldinger
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. Ralph E. Koldinger's NPI number?
Dr. Ralph E. Koldinger's NPI number is 1952421703. It was assigned on March 29, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ralph E. Koldinger?
Dr. Ralph E. Koldinger is a gastroenterologist in Sacramento, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Ralph E. Koldinger practice?
Dr. Koldinger practices at 3941 J Street, Sacramento, CA 95819. Dr. Koldinger also practices at 2825 Capitol Ave, Sacramento, CA 95816. Dr. Koldinger's primary practice is Sacramento Gastroenterology Medical Group in Sacramento, California. Dmand AI also links Dr. Koldinger to 1 medical group.
What is Dr. Ralph E. Koldinger's office phone number?
The practice phone on file for Dr. Koldinger is (916) 454-0655.
What is Dr. Ralph E. Koldinger's medical license number?
Dr. Koldinger holds California license G9968.
Does Dr. Ralph E. Koldinger accept Medicare?
Yes. CMS data shows Dr. Koldinger billed Medicare for 38 services in 2018.
What services does Dr. Ralph E. Koldinger bill to Medicare?
In 2018, Dr. Koldinger's most billed Medicare services were office visit, established patient (99213) and office visit, established patient (99214).
What drugs does Dr. Ralph E. Koldinger prescribe most?
In 2018 Medicare Part D data, Dr. Koldinger's most prescribed drugs by claims were Dexilant, Balsalazide Disodium and Azathioprine.
Has Dr. Ralph E. Koldinger received payments from drug or device companies?
CMS Open Payments shows $4,336 in general payments to Dr. Koldinger from 19 companies from 2016 to 2018. The largest total came from Abbvie Inc.
How long has Dr. Ralph E. Koldinger been practicing?
Dr. Koldinger's NPI was assigned in 2007.
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