Isaac Joseph Berg, M.D.
Internal Medicine Physician · Grand Island, NE
Isaac Joseph Berg, M.D. is an internal medicine physician with a practice address in Grand Island, Nebraska, and NPI 1659509149, issued on Jun 23, 2009. Check the license (Nebraska 26128, as entered in NPPES) on the Nebraska Board of Medicine and Surgery; the Medicare figures below come from public CMS files.
- Name
- Isaac Joseph Berg
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 26128 NE
5982 NE
Self-reported in NPPES; status is on the state search - Practice location
- 729 N Custer Ave, Grand Island, NE 68803
- Phone
- (308) 382-9266
- Enumerated
- Jun 23, 2009
- Record last updated
- Aug 10, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (308) 382-5290
- Medicare enrollment
- Enrolled (PECOS I20120814000091); accepts Medicare assignment
- Medical or professional school
- University Of Nebraska College Of Medicine, 2009
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 813 in Nebraska → Look up another NPI →
Also registered at 729 N Custer Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jay Anderson, M.D.Internal Medicine Physician1649393927
- Jennifer Brown, M.D.Internal Medicine Physician1477539278
- John Cannella, M.D.Internal Medicine Physician1386642379
- Michele Carey, RNAdministrator Registered Nurse1053616698
- David Colan, M.D.Internal Medicine Physician1154329142
- Nicole Covarrubias, PA-CPhysician Assistant1508376799
Verify Isaac Joseph Berg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNebraska Board of Medicine and Surgery
Search for license 26128Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.2 times the Medicare Part D claims of the average internal medicine physician in 2024
13,293 Medicare Part D claims for 719 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 314 claims were for opioids.
Most prescribed
- Atorvastatin Calcium621 claims
- Levothyroxine Sodium485 claims
- Omeprazole414 claims
- Pantoprazole Sodium379 claims
- Losartan Potassium360 claims
- Amlodipine Besylate295 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.
Bills Medicare through one group practice
- Unmc PhysiciansGrand Island, NE
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Isaac Joseph Berg among 813 internal medicine physician records in Nebraska
Isaac Joseph Berg, M.D. is one of 813 internal medicine physician records with a practice address in Nebraska. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 34% of them.
- NPI issued2009 · 34% of these records are older, 63% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2009 · median 2010 among the 414 with a school on file
- Record last updated2012 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Nebraska practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
25 internal medicine physician records list a practice address in Grand Island
They are 25 of the 2,378 NPPES records with a practice address in Grand Island, and 813 internal medicine physician records in Nebraska.
All 813 in Nebraska → Every provider in Grand Island → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Heidi Beckett, M.D.Grand Island, NE 688031831230754
- James Billups, M.D.Grand Island, NE 688031730270455
- Jennifer Brown, M.D.Grand Island, NE 688031477539278
- John Cannella, M.D.Grand Island, NE 688031386642379
- David Colan, M.D.Grand Island, NE 688031154329142
- Ryan Crouch, D.O.Grand Island, NE 688031790724201
- Frederick Echternacht, MDGrand Island, NE 688031821058843
- Moncarm Fouche, M.D.Grand Island, NE 688031821082603
Common questions
What is Isaac Joseph Berg, M.D.'s NPI number?
Isaac Joseph Berg, M.D.'s National Provider Identifier (NPI) is 1659509149, issued on Jun 23, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Isaac Joseph Berg, M.D. located?
The NPPES record lists a practice address at 729 N Custer Ave, Grand Island, NE, 68803. Phone: (308) 382-9266. Providers update this record themselves, so call before visiting.
How can I verify Isaac Joseph Berg, M.D.'s license?
NPPES lists Nebraska license number 26128, as entered by the provider. Search the Nebraska Board of Medicine and Surgery at https://www.nebraska.gov/LISSearch/search.cgi. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Isaac Joseph Berg, M.D. prescribe under Medicare Part D?
In 2024, Isaac Joseph Berg, M.D. had 13,293 Medicare Part D claims for 719 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.