Michael David Groshner
- Medicare services, 2024
- 180
- Medicare patients, 2024
- 118
- Part D claims, 2024
- 7,724
- Hospital affiliations
- 1
- Industry payments
- $726
- Practice address
- 3800 Kilroy Airport Way, Long Beach, CA 90806
- Practice phone
- Call (520) 529-8387
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Carelon Medical Partners of Arizona
Long Beach, California
Find Michael Groshner'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.
Michael David Groshner is an internist in Long Beach, California
Michael Groshner practices at Carelon Medical Partners of Arizona in Long Beach, California.
Michael Groshner's NPI, 1861929952, was assigned on May 19, 2017. Michael Groshner holds Nevada license SL1203.
- NPI
- 1861929952NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7719257740
- NPI enumeration date
- May 19, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (520) 529-8387
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Michael David Groshner practices at Carelon Medical Partners of Arizona in Long Beach, California
Michael Groshner's primary practice is Carelon Medical Partners of Arizona, at 3800 Kilroy Airport Way, Long Beach, CA 90806 in Los Angeles County. The practice phone is (520) 529-8387.
- Carelon Medical Partners of Arizona3800 Kilroy Airport Way, Long Beach, CA 90806 · Los Angeles CountyPhone(520) 529-8387
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Michael David Groshner is affiliated with 4 sites of care and 2 medical groups
Michael Groshner's primary practice is Carelon Medical Partners of Arizona in Long Beach, California. Michael Groshner is also affiliated with Dignity Health Chandler Regional Medical Center. The medical group on file is Carelon Health. Dmand AI also links Michael Groshner to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Michael David Groshner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Michael Groshner practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Carelon Medical Partners of Arizona | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Michael David Groshner is one of 16,751 internists in California
Internal medicine is Michael Groshner's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Michael Groshner is licensed in Nevada.
Specialties and state licenses
- Internal medicine, NevadaPrimary
Internists near Michael Groshner
Counts of internists 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
Michael David Groshner billed Medicare for 180 services in 2024
CMS data shows 180 Medicare services from Michael Groshner across 4 procedure codes in 2024, for 118 Medicare patients. Medicare paid $14,352 for them. Every service was in a facility, such as a hospital, rather than an office.
Michael Groshner's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1772024: 1802%
Michael Groshner compared with the California median for internists, 2024
- Michael Groshner
- California median
- Medicare services
- 180vs 36150% below
- Medicare patients
- 118vs 15122% below
- Part D claims
- 7,022vs 42116.7 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Michael Groshner'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Michael David Groshner treated 118 Medicare patients in 2024, average age 75
CMS counts 118 Medicare patients who saw Michael Groshner in 2024. The largest group is 75 to 84, with 48 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 19% are also on Medicaid. Their average risk score is 2.79, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Michael Groshner's median patient age at 76, with 56% women.
Michael Groshner's Medicare patients by age, 2024
Michael Groshner's Medicare patients by sex, 2024
- Women5950%
- Men5950%
Chronic conditions among Michael Groshner's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease58%
- Arthritis57%
- Diabetes53%
- Chronic kidney disease51%
- Mood disorders49%
- Depression47%
Share of Medicare patients with each condition. A patient can have several.
Michael Groshner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Michael David Groshner wrote 7,724 Medicare Part D claims in 2024
In 2024, Michael Groshner wrote 7,724 Medicare Part D claims for 714 patients. 86% of them were for generic drugs. CMS names the drug for 7,022 of them, across 131 drugs with 11 or more claims each, at $504,852 in total drug cost. In 2023, CMS named 5,924 claims across 124 drugs.
Michael Groshner's Part D claims by kind of drug, 2024
- Generic6,633 claims86%
- Brand-name960 claims12%
- Other131 claims2%
Michael Groshner'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 Michael Groshner's Part D claims, 2024
- Opioids2%169 of 7,724 claims
- Antibiotics1%68 of 7,724 claims
- Antipsychotics, patients 65 and over0%22 of 7,724 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: 5,9242024: 7,02219%
Drugs named by CMS: 131 in 2024, 124 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 Michael David Groshner takes part in Medicare
Michael Groshner 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
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Michael David Groshner received $726 in industry payments from 2017 to 2025
CMS Open Payments shows 23 general payments to Michael Groshner from 12 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 100% of the total. Eli Lilly and Company paid the most, $140.
General payments to Michael Groshner by program year, 2017 to 2025
Companies that paid Michael Groshner the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Michael David Groshner'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| 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 Michael David Groshner
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Michael David Groshner's NPI number?
Michael David Groshner's NPI number is 1861929952. It was assigned on May 19, 2017, and it is active in the NPI Registry.
What does Michael David Groshner specialize in?
Michael David Groshner is an internist in Long Beach, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Michael David Groshner practice?
Michael Groshner practices at 3800 Kilroy Airport Way, Long Beach, CA 90806. Michael Groshner's primary practice is Carelon Medical Partners of Arizona in Long Beach, California. Dmand AI also links Michael Groshner to 2 group practices and clinics and 1 medical group.
What is Michael David Groshner's office phone number?
The practice phone on file for Michael Groshner is (520) 529-8387.
What is Michael David Groshner's medical license number?
Michael Groshner holds Nevada license SL1203.
Which hospitals is Michael David Groshner affiliated with?
Michael Groshner is affiliated with Dignity Health Chandler Regional Medical Center.
What medical group is Michael David Groshner part of?
Michael Groshner is linked to Carelon Health. Dmand AI links Michael Groshner to 1 more medical group.
Does Michael David Groshner accept Medicare?
Yes. CMS data shows Michael Groshner billed Medicare for 180 services in 2024, and Michael Groshner accepts Medicare assignment.
How many Medicare patients does Michael David Groshner see?
CMS counts 118 Medicare patients who saw Michael Groshner in 2024, with an average age of 75.
What services does Michael David Groshner bill to Medicare?
In 2024, Michael Groshner's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and hospital inpatient care (99239).
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What drugs does Michael David Groshner prescribe most?
In 2024 Medicare Part D data, Michael Groshner's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Levothyroxine Sodium.
Has Michael David Groshner received payments from drug or device companies?
CMS Open Payments shows $726 in general payments to Michael Groshner from 12 companies from 2017 to 2025. The largest total came from Eli Lilly and Company.
How long has Michael David Groshner been practicing?
Michael Groshner graduated from medical school in 2017, 9 years ago.
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