Dr. Dennis Matejka, MD
- Medicare patients, 2024
- 20
- Part D claims, 2024
- 378
- Hospital affiliations
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 1011 Baldwin Park Blvd, Baldwin Park, CA 91706
- Practice phone
- Call (626) 851-1011
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Matejka'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. Dennis Matejka is an internist in Baldwin Park, California
Dr. Matejka practices at Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California, part of Kaiser Permanente.
Dr. Matejka's NPI, 1053482091, was assigned on November 13, 2006. Dr. Matejka graduated from University of California, Irvine, California College of Medicine in 1994. Dr. Matejka holds California license A54589.
- NPI
- 1053482091NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7810056322
- NPI enumeration date
- November 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (626) 851-1011
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Dennis Matejka practices at Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California
Dr. Matejka's primary practice is Kaiser Permanente Baldwin Park Medical Center, at 1011 Baldwin Park Blvd, Baldwin Park, CA 91706 in Los Angeles County. The practice phone is (626) 851-1011.
- Kaiser Permanente Baldwin Park Medical Center1011 Baldwin Park Blvd, Baldwin Park, CA 91706 · Los Angeles CountyPhone(626) 851-1011
Source: Dmand AI Affiliation Data
Dr. Dennis Matejka is affiliated with 1 site of care and 1 medical group
Dr. Matejka's primary practice is Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Dennis Matejka's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Matejka practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente Baldwin Park Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Dennis Matejka is one of 16,751 internists in California
Internal medicine is Dr. Matejka's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Matejka is board certified in internal medicine by the American Board of Internal Medicine. Dr. Matejka is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Matejka
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. Dennis Matejka treated 20 Medicare patients in 2024, average age 72
CMS counts 20 Medicare patients who saw Dr. Matejka in 2024. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 4.36, 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. Matejka's median patient age at 74, with 46% women.
Chronic conditions among Dr. Matejka's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes65%
- Heart failure55%
Share of Medicare patients with each condition. A patient can have several.
Dr. Matejka's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women46%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Dennis Matejka wrote 378 Medicare Part D claims in 2024
In 2024, Dr. Matejka wrote 378 Medicare Part D claims for 150 patients. 88% of them were for generic drugs. CMS names the drug for 147 of them, across 8 drugs with 11 or more claims each, at $13,689 in total drug cost. In 2023, CMS named 160 claims across 10 drugs.
Dr. Matejka's Part D claims by kind of drug, 2024
- Generic333 claims88%
- Brand-name and other45 claims12%
Dr. Matejka'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. Matejka's Part D claims, 2024
- Antibiotics15%58 of 378 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: 1602024: 1478%
Drugs named by CMS: 8 in 2024, 10 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 Dr. Dennis Matejka takes part in Medicare
Dr. Matejka 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)
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Dr. Dennis Matejka graduated from University of California, Irvine, California College of Medicine
Dr. Matejka graduated from University of California, Irvine, California College of Medicine in 1994.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Dennis Matejka'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 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) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Dennis Matejka
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. Dennis Matejka's NPI number?
Dr. Dennis Matejka's NPI number is 1053482091. It was assigned on November 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Dennis Matejka?
Dr. Dennis Matejka is an internist in Baldwin Park, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Dennis Matejka practice?
Dr. Matejka practices at 1011 Baldwin Park Blvd, Baldwin Park, CA 91706. Dr. Matejka's primary practice is Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California, part of Kaiser Permanente.
What is Dr. Dennis Matejka's office phone number?
The practice phone on file for Dr. Matejka is (626) 851-1011.
What is Dr. Dennis Matejka's medical license number?
Dr. Matejka holds California license A54589.
Which hospitals is Dr. Dennis Matejka affiliated with?
Dr. Matejka practices at Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California.
What medical group is Dr. Dennis Matejka part of?
Dr. Matejka is linked to Southern California Permanente Medical Group.
Does Dr. Dennis Matejka accept Medicare?
Yes. CMS lists Dr. Matejka as accepting Medicare assignment.
How many Medicare patients does Dr. Dennis Matejka see?
CMS counts 20 Medicare patients who saw Dr. Matejka in 2024, with an average age of 72.
Is Dr. Dennis Matejka board certified?
Yes. Dr. Matejka is board certified in internal medicine by the American Board of Internal Medicine.
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Where did Dr. Dennis Matejka go to medical school?
Dr. Matejka graduated from University of California, Irvine, California College of Medicine in 1994.
What drugs does Dr. Dennis Matejka prescribe most?
In 2024 Medicare Part D data, Dr. Matejka's most prescribed drugs by claims were Furosemide, Amlodipine Besylate and Jardiance.
How long has Dr. Dennis Matejka been practicing?
Dr. Matejka graduated from medical school in 1994, 32 years ago.
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