Dr. Michael Robert Stefan, MD
- Medicare services, 2020
- 168
- Part D claims, 2024
- 5,360
- Industry payments
- $250
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 3834 S Western Ave, Los Angeles, CA 90062
- Practice phone
- Call (323) 730-3507
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Western Health Center
FQHC - Main Site · Los Angeles, California
Find Dr. Stefan's professional email, personal email and mobile number
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Dr. Michael Robert Stefan is an internist in Los Angeles, California
Dr. Stefan practices at Western Health Center in Los Angeles, California.
Dr. Stefan's NPI, 1134149099, was assigned on July 20, 2006. Dr. Stefan graduated from Keck School of Medicine of USC in 1978. Dr. Stefan holds California license G39759.
- NPI
- 1134149099NPI Registry (opens in a new tab)
- NPI enumeration date
- July 20, 2006
- NPI status
- Active
- Practice phone
- (323) 730-3507
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Michael Robert Stefan practices at Western Health Center in Los Angeles, California
Dr. Stefan's primary practice is Western Health Center, at 3834 S Western Ave, Los Angeles, CA 90062. The practice phone is (323) 730-3507.
- Western Health Center3834 S Western Ave, Los Angeles, CA 90062Phone(323) 730-3507
Source: Dmand AI Affiliation Data
Dr. Michael Robert Stefan is affiliated with 1 site of care and 1 medical group
Dr. Stefan's primary practice is Western Health Center in Los Angeles, California. The medical group on file is T.H.E. (To Help Everyone) Health and Wellness Centers. Dr. Stefan's employer is on file too: a community health center (fqhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael Robert Stefan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Stefan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Western Health Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael Robert Stefan is one of 16,751 internists in California
Internal medicine is Dr. Stefan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Stefan is board certified in internal medicine by the American Board of Internal Medicine. Dr. Stefan is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Stefan
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
Dr. Michael Robert Stefan billed Medicare for 168 services in 2020
CMS data shows 168 Medicare services from Dr. Stefan across 5 procedure codes in 2020. Medicare paid $11,058 for them. Every service was in an office.
Dr. Stefan's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 1,4342020: 9693%
- Tests and treatments
- 2019: 3432020: 4387%
- Lab and pathology
- 2019: 1692020: 2983%
Dr. Stefan compared with the California median for internists, 2020
- Dr. Stefan
- California median
- Medicare services
- 168vs 36153% below
- Part D claims
- 4,704vs 42111.2 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Stefan's most billed Medicare procedure codes, 2020
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. Stefan and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Robert Stefan's patients have a median age of 57
Across all payers, Dmand AI patient panel data puts Dr. Stefan's median patient age at 57, with 55% women.
Dr. Stefan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women55%
- Men44%
Source: Dmand AI Patient Panel Data
Dr. Michael Robert Stefan wrote 5,360 Medicare Part D claims in 2024
In 2024, Dr. Stefan wrote 5,360 Medicare Part D claims for 452 patients. 84% of them were for generic drugs. CMS names the drug for 4,704 of them, across 102 drugs with 11 or more claims each, at $654,370 in total drug cost. In 2023, CMS named 4,143 claims across 103 drugs.
Dr. Stefan's Part D claims by kind of drug, 2024
- Generic4,525 claims84%
- Brand-name807 claims15%
- Other28 claims1%
Dr. Stefan'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. Stefan's Part D claims, 2024
- Opioids2%108 of 5,360 claims
- Antibiotics1%56 of 5,360 claims
- Antipsychotics, patients 65 and over1%39 of 5,360 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: 4,1432024: 4,70414%
Drugs named by CMS: 102 in 2024, 103 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. Michael Robert Stefan received $250 in industry payments from 2016 to 2025
CMS Open Payments shows 3 general payments to Dr. Stefan from 2 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Medtronic, Inc. paid the most, $137.
General payments to Dr. Stefan by program year, 2016 to 2025
Companies that paid Dr. Stefan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael Robert Stefan graduated from Keck School of Medicine of USC
Dr. Stefan graduated from Keck School of Medicine of USC in 1978.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Michael Robert Stefan accepts plans from 9 insurance carriers
Dr. Stefan is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- LA Care
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- Regence Health Plans
- +1 more carriersWith a free account
Plan types Dr. Stefan accepts, by number of carriers
- Medicare8
- HMO6
- PPO6
- POS3
- EPO2
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael Robert Stefan'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Michael Robert Stefan
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. Michael Robert Stefan's NPI number?
Dr. Michael Robert Stefan's NPI number is 1134149099. It was assigned on July 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Robert Stefan?
Dr. Michael Robert Stefan is an internist in Los Angeles, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Michael Robert Stefan practice?
Dr. Stefan practices at 3834 S Western Ave, Los Angeles, CA 90062. Dr. Stefan's primary practice is Western Health Center in Los Angeles, California.
What is Dr. Michael Robert Stefan's office phone number?
The practice phone on file for Dr. Stefan is (323) 730-3507.
What is Dr. Michael Robert Stefan's medical license number?
Dr. Stefan holds California license G39759.
What medical group is Dr. Michael Robert Stefan part of?
Dr. Stefan is linked to T.H.E. (To Help Everyone) Health and Wellness Centers.
Does Dr. Michael Robert Stefan accept Medicare?
Yes. CMS data shows Dr. Stefan billed Medicare for 168 services in 2020.
Is Dr. Michael Robert Stefan board certified?
Yes. Dr. Stefan is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Michael Robert Stefan bill to Medicare?
In 2020, Dr. Stefan's most billed Medicare services were office visit, established patient (99215), heart test or procedure (93000) and lab and pathology test (81000).
Where did Dr. Michael Robert Stefan go to medical school?
Dr. Stefan graduated from Keck School of Medicine of USC in 1978.
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What drugs does Dr. Michael Robert Stefan prescribe most?
In 2024 Medicare Part D data, Dr. Stefan's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Albuterol Sulfate Hfa.
Has Dr. Michael Robert Stefan received payments from drug or device companies?
CMS Open Payments shows $250 in general payments to Dr. Stefan from 2 companies from 2016 to 2025. The largest total came from Medtronic, Inc.
How long has Dr. Michael Robert Stefan been practicing?
Dr. Stefan graduated from medical school in 1978, 48 years ago.
What insurance does Dr. Michael Robert Stefan accept?
Dr. Stefan is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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