Dr. Mark J. Fredrick, MD
- Medicare services, 2024
- 466
- Medicare patients, 2024
- 216
- Part D claims, 2024
- 7,508
- Industry payments
- $1,637
- Affiliated sites
- 2
- Practice address
- 19066 Magnolia St, Huntington Beach, CA 92646
- Practice phone
- Call (213) 623-2225
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Healthcare Partners Medical Group
Huntington Beach, California
Find Dr. Fredrick'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. Mark J. Fredrick is an internist in Huntington Beach, California
Dr. Fredrick practices at Healthcare Partners Medical Group in Huntington Beach, California.
Dr. Fredrick's NPI, 1518964998, was assigned on June 30, 2005. Dr. Fredrick graduated from Indiana University School of Medicine in 1988. Dr. Fredrick holds California license G67380.
- NPI
- 1518964998NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7315985546
- NPI enumeration date
- June 30, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (213) 623-2225
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark J. Fredrick practices at Healthcare Partners Medical Group in Huntington Beach, California
Dr. Fredrick's primary practice is Healthcare Partners Medical Group, at 19066 Magnolia St, Huntington Beach, CA 92646 in Orange County. The practice phone is (213) 623-2225.
- Healthcare Partners Medical Group19066 Magnolia St, Huntington Beach, CA 92646 · Orange CountyPhone(213) 623-2225
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark J. Fredrick is affiliated with 3 sites of care and 1 medical group
Dr. Fredrick's primary practice is Healthcare Partners Medical Group in Huntington Beach, California. The medical group on file is Optum - Downtown Los Angeles. Dmand AI also links Dr. Fredrick to 1 more group practice or clinic and 1 home health agency, 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 Dr. Mark J. Fredrick's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fredrick practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Healthcare Partners Medical Group | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark J. Fredrick is one of 16,751 internists in California
Internal medicine is Dr. Fredrick's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Fredrick is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Fredrick
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. Mark J. Fredrick billed Medicare for 466 services in 2024
CMS data shows 466 Medicare services from Dr. Fredrick across 7 procedure codes in 2024, for 216 Medicare patients. Medicare paid $28,587 for them. Every service was in an office.
Dr. Fredrick's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2162024: 40788%
- Other services
- 2023: 852024: 5931%
- Tests and treatments
- 2023: 162024: 0100%
Dr. Fredrick compared with the California median for internists, 2024
- Dr. Fredrick
- California median
- Medicare services
- 466vs 36129% above
- Medicare patients
- 216vs 15143% above
- Part D claims
- 6,788vs 42116.1 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Fredrick'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Fredrick and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark J. Fredrick treated 216 Medicare patients in 2024, average age 73
CMS counts 216 Medicare patients who saw Dr. Fredrick in 2024. The largest group is 65 to 74, with 92 patients. 69% of them have high cholesterol, and 63% have high blood pressure. 30% are also on Medicaid. Their average risk score is 1.42, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Fredrick's median patient age at 70, with 44% women.
Dr. Fredrick's Medicare patients by age, 2024
Dr. Fredrick's Medicare patients by sex, 2024
- Women11553%
- Men10147%
Chronic conditions among Dr. Fredrick's Medicare patients, 2024
- High cholesterol69%
- High blood pressure63%
- Arthritis40%
- Diabetes29%
- Chronic kidney disease26%
- Mood disorders25%
- Anxiety24%
- Depression21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fredrick's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women44%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark J. Fredrick wrote 7,508 Medicare Part D claims in 2024
In 2024, Dr. Fredrick wrote 7,508 Medicare Part D claims for 510 patients. 89% of them were for generic drugs. CMS names the drug for 6,788 of them, across 120 drugs with 11 or more claims each, at $547,004 in total drug cost. In 2023, CMS named 6,948 claims across 120 drugs.
Dr. Fredrick's Part D claims by kind of drug, 2024
- Generic6,674 claims89%
- Brand-name797 claims11%
- Other37 claims0%
Dr. Fredrick'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. Fredrick's Part D claims, 2024
- Opioids4%307 of 7,508 claims
- Antibiotics2%152 of 7,508 claims
- Antipsychotics, patients 65 and over1%57 of 7,508 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: 6,9482024: 6,7882%
Drugs named by CMS: 120 in 2024, 120 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
Dr. Mark J. Fredrick offers telehealth to Medicare patients
Dr. Fredrick accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Fredrick as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Mark J. Fredrick received $1,637 in industry payments from 2016 to 2025
CMS Open Payments shows 113 general payments to Dr. Fredrick from 15 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $616.
General payments to Dr. Fredrick by program year, 2016 to 2025
Companies that paid Dr. Fredrick 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. Mark J. Fredrick graduated from Indiana University School of Medicine
Dr. Fredrick graduated from Indiana University School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark J. Fredrick'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) |
| 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. Mark J. Fredrick
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. Mark J. Fredrick's NPI number?
Dr. Mark J. Fredrick's NPI number is 1518964998. It was assigned on June 30, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark J. Fredrick?
Dr. Mark J. Fredrick is an internist in Huntington Beach, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mark J. Fredrick practice?
Dr. Fredrick practices at 19066 Magnolia St, Huntington Beach, CA 92646. Dr. Fredrick's primary practice is Healthcare Partners Medical Group in Huntington Beach, California. Dmand AI also links Dr. Fredrick to 1 group practice or clinic and 1 home health agency.
What is Dr. Mark J. Fredrick's office phone number?
The practice phone on file for Dr. Fredrick is (213) 623-2225.
What is Dr. Mark J. Fredrick's medical license number?
Dr. Fredrick holds California license G67380.
What medical group is Dr. Mark J. Fredrick part of?
Dr. Fredrick is linked to Optum - Downtown Los Angeles.
Does Dr. Mark J. Fredrick accept Medicare?
Yes. CMS data shows Dr. Fredrick billed Medicare for 466 services in 2024, and Dr. Fredrick accepts Medicare assignment.
Does Dr. Mark J. Fredrick offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Fredrick as offering telehealth services.
How many Medicare patients does Dr. Mark J. Fredrick see?
CMS counts 216 Medicare patients who saw Dr. Fredrick in 2024, with an average age of 73.
What services does Dr. Mark J. Fredrick bill to Medicare?
In 2024, Dr. Fredrick's most billed Medicare services were office visit, established patient (99213), care management and other visits (99441) and care management and other visits (99442).
Show 4 more questionsShow fewer questions
Where did Dr. Mark J. Fredrick go to medical school?
Dr. Fredrick graduated from Indiana University School of Medicine in 1988.
What drugs does Dr. Mark J. Fredrick prescribe most?
In 2024 Medicare Part D data, Dr. Fredrick's most prescribed drugs by claims were Atorvastatin Calcium, Hydrocodone-Acetaminophen and Amlodipine Besylate.
Has Dr. Mark J. Fredrick received payments from drug or device companies?
CMS Open Payments shows $1,637 in general payments to Dr. Fredrick from 15 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Mark J. Fredrick been practicing?
Dr. Fredrick graduated from medical school in 1988, 38 years ago.
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