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Dr. Eric J. Messner, MD
NPI1578640413
- Medicare services, 2024
- 24
- Medicare patients, 2024
- 25
- Part D claims, 2024
- 8,387
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 700 Lawrence Expressway, Santa Clara, CA 95051
- Practice phone
- Call (408) 236-6400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Messner's professional email, personal email and mobile number
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Dr. Eric J. Messner is an internist in Santa Clara, California
Dr. Messner practices at Santa Clara Medical Center in Santa Clara, California, part of Kaiser Permanente.
Dr. Messner's NPI, 1578640413, was assigned on October 31, 2006. Dr. Messner graduated from UC Davis School of Medicine in 1993. Dr. Messner holds California license G80433.
NPI and contact details
- NPI
- 1578640413NPI Registry (opens in a new tab)
- NPI enumeration date
- October 31, 2006
- NPI status
- Active
- Practice phone
- (408) 236-6400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Eric J. Messner practices at Santa Clara Medical Center in Santa Clara, California
Dr. Messner's primary practice is Santa Clara Medical Center, at 700 Lawrence Expressway, Santa Clara, CA 95051 in Santa Clara County. The practice phone is (408) 236-6400.
- Santa Clara Medical Center700 Lawrence Expressway, Santa Clara, CA 95051 · Santa Clara CountyPhone(408) 236-6400
Source: Dmand AI Affiliation Data
Dr. Eric J. Messner is affiliated with 2 sites of care and 1 medical group
Dr. Messner's primary practice is Santa Clara Medical Center in Santa Clara, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Messner to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Eric J. Messner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Messner practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Santa Clara Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Eric J. Messner is one of 16,751 internists in California
Internal medicine is Dr. Messner's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Messner is board certified in internal medicine by the American Board of Internal Medicine. Dr. Messner is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists multiple sclerosis among the conditions Dr. Messner treats.
Internists near Dr. Messner
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
16,751internists in California273internists in Santa Clara87internists at Santa Clara Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Eric J. Messner billed Medicare for 24 services in 2024
CMS data shows 24 Medicare services from Dr. Messner across 1 procedure code in 2024, for 25 Medicare patients. Medicare paid $173 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202424
Medicare patients25
Paid by Medicare$173
Procedure codes1
Dr. Messner's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 292024: 2417%
Dr. Messner compared with the California median for internists, 2024
- Dr. Messner
- California median
- Medicare services
- 24vs 36193% below
- Medicare patients
- 25vs 15183% below
- Part D claims
- 7,799vs 42118.5 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Messner'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. Messner?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Messner and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Eric J. Messner treated 25 Medicare patients in 2024, average age 66
CMS counts 25 Medicare patients who saw Dr. Messner in 2024. 64% of them have high blood pressure, and 64% have high cholesterol. 52% are also on Medicaid. Their average risk score is 1.79, 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. Messner's median patient age at 64, with 51% women.
Medicare patients, 202425
Average age66
Average risk score1.79
Also on Medicaid52%
Chronic conditions among Dr. Messner's Medicare patients, 2024
- High blood pressure64%
- High cholesterol64%
Share of Medicare patients with each condition. A patient can have several.
Dr. Messner'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
- Women51%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Eric J. Messner wrote 8,387 Medicare Part D claims in 2024
In 2024, Dr. Messner wrote 8,387 Medicare Part D claims for 467 patients. 89% of them were for generic drugs. CMS names the drug for 7,799 of them, across 136 drugs with 11 or more claims each, at $496,877 in total drug cost. In 2023, CMS named 7,475 claims across 131 drugs.
Part D claims, 20248,387
Drugs named by CMS136
Total drug cost$496,877
Part D patients467
Dr. Messner's Part D claims by kind of drug, 2024
- Generic7,502 claims89%
- Brand-name845 claims10%
- Other40 claims0%
Dr. Messner'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. Messner's Part D claims, 2024
- Opioids5%441 of 8,387 claims
- Antibiotics3%292 of 8,387 claims
- Antipsychotics, patients 65 and over0%30 of 8,387 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: 7,4752024: 7,7994%
Drugs named by CMS: 136 in 2024, 131 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
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Dr. Eric J. Messner has 1 publication on record
Dmand AI links 1 paper to Dr. Messner in 2015. Dr. Messner's most frequent co-authors are Arnold Silva, MD, PhD and Stuart M. Sprague, DO.
Papers1
Dr. Messner's most frequent co-authors
Recent publications by Dr. Messner
See who Dr. Messner researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Messner works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Eric J. Messner graduated from UC Davis School of Medicine
Dr. Messner graduated from UC Davis School of Medicine in 1993.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Eric J. Messner accepts plans from 2 insurance carriers
Dr. Messner is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Messner accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Eric J. Messner'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Eric J. Messner
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. Eric J. Messner's NPI number?
Dr. Eric J. Messner's NPI number is 1578640413. It was assigned on October 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Eric J. Messner?
Dr. Eric J. Messner is an internist in Santa Clara, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Eric J. Messner practice?
Dr. Messner practices at 700 Lawrence Expressway, Santa Clara, CA 95051. Dr. Messner's primary practice is Santa Clara Medical Center in Santa Clara, California, part of Kaiser Permanente. Dmand AI also links Dr. Messner to 1 group practice or clinic.
What is Dr. Eric J. Messner's office phone number?
The practice phone on file for Dr. Messner is (408) 236-6400.
What is Dr. Eric J. Messner's medical license number?
Dr. Messner holds California license G80433.
Which hospitals is Dr. Eric J. Messner affiliated with?
Dr. Messner practices at Santa Clara Medical Center in Santa Clara, California.
What medical group is Dr. Eric J. Messner part of?
Dr. Messner is linked to The Permanente Medical Group, Inc.
Does Dr. Eric J. Messner accept Medicare?
Yes. CMS data shows Dr. Messner billed Medicare for 24 services in 2024.
How many Medicare patients does Dr. Eric J. Messner see?
CMS counts 25 Medicare patients who saw Dr. Messner in 2024, with an average age of 66.
Is Dr. Eric J. Messner board certified?
Yes. Dr. Messner is board certified in internal medicine by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Eric J. Messner bill to Medicare?
In 2024, Dr. Messner's most billed Medicare services were heart test or procedure (93010).
Where did Dr. Eric J. Messner go to medical school?
Dr. Messner graduated from UC Davis School of Medicine in 1993.
What drugs does Dr. Eric J. Messner prescribe most?
In 2024 Medicare Part D data, Dr. Messner's most prescribed drugs by claims were Amlodipine Besylate, Rosuvastatin Calcium and Atorvastatin Calcium.
How long has Dr. Eric J. Messner been practicing?
Dr. Messner graduated from medical school in 1993, 33 years ago.
Does Dr. Eric J. Messner do research?
Dmand AI links 1 publication to Dr. Messner.
Who does Dr. Eric J. Messner publish with?
Dr. Messner's most frequent co-authors are Arnold Silva, MD, PhD (1 shared paper) and Stuart M. Sprague, DO (1 shared paper).
What insurance does Dr. Eric J. Messner accept?
Dr. Messner is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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