Dr. Herman Mathias, MD
- Medicare services, 2024
- 2,712
- Medicare patients, 2024
- 635
- Part D claims, 2024
- 7,940
- Industry payments
- $7,483
- Affiliated sites
- 5
- Practice address
- 391 N San Jacinto St, Hemet, CA 92543
- Practice phone
- Call (951) 533-5123
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mathias Primary Care Associates, Inc
Hemet, California
Find Dr. Mathias' 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. Herman Mathias is an internist in Hemet, California
Dr. Mathias practices at Mathias Primary Care Associates, Inc in Hemet, California.
Dr. Mathias' NPI, 1487767265, was assigned on August 16, 2006. Dr. Mathias graduated from Kasturba Medical College Manipal in 1977. Dr. Mathias holds California license A41055.
- NPI
- 1487767265NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1951205400
- NPI enumeration date
- August 16, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (951) 533-5123
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Herman Mathias practices at Mathias Primary Care Associates, Inc in Hemet, California
Dr. Mathias' primary practice is Mathias Primary Care Associates, Inc, at 391 N San Jacinto St, Hemet, CA 92543 in Riverside County. The practice phone is (951) 533-5123.
- Mathias Primary Care Associates, Inc391 N San Jacinto St, Hemet, CA 92543 · Riverside CountyPhone(951) 533-5123
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Herman Mathias is affiliated with 6 sites of care and 3 medical groups
Dr. Mathias' primary practice is Mathias Primary Care Associates, Inc in Hemet, California. The medical group on file is Apex Healthcare Medical Center. Dmand AI also links Dr. Mathias to 3 more home health agencies, 2 group practices and clinics and 2 medical groups, 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. Herman Mathias' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mathias practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mathias Primary Care Associates, Inc | Available with a free account |
| +5 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Herman Mathias is one of 16,751 internists in California
Internal medicine is Dr. Mathias' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Mathias is board certified in geriatric medicine by the American Board of Internal Medicine. Dmand AI has Dr. Mathias' licenses on file in 3 states: California, New York and Pennsylvania.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- New York license
- Pennsylvania license
Clinical focus
Dmand AI lists acid reflux, acute gastroduodenitis, acute sinusitis, acute skin infection, adjustment disease, alzheimer's disease, aneurysm and ankle or foot injury among the conditions Dr. Mathias treats.
Internists near Dr. Mathias
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. Herman Mathias billed Medicare for 2,712 services in 2024
CMS data shows 2,712 Medicare services from Dr. Mathias across 23 procedure codes in 2024, for 635 Medicare patients. Medicare paid $198,605 for them.
Dr. Mathias' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,9782024: 1,8586%
- Other services
- 2023: 1862024: 759308%
- Tests and treatments
- 2023: 912024: 4254%
- Lab and pathology
- 2023: 292024: 4038%
- Surgery
- 2023: 02024: 13
- Drugs given in the office
- 2023: 752024: 0100%
Where Dr. Mathias' Medicare services took place, 2024
- In an office2,61396%
- In a facility994%
Dr. Mathias compared with the California median for internists, 2024
- Dr. Mathias
- California median
- Medicare services
- 2,712vs 3617.5 times
- Medicare patients
- 635vs 1514.2 times
- Part D claims
- 7,079vs 42116.8 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Mathias' 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. Mathias?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mathias and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Herman Mathias treated 635 Medicare patients in 2024, average age 73
CMS counts 635 Medicare patients who saw Dr. Mathias in 2024. The largest group is 65 to 74, with 241 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 55% are also on Medicaid. Their average risk score is 1.67, 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. Mathias' median patient age at 46, with 62% women.
Dr. Mathias' Medicare patients by age, 2024
Dr. Mathias' Medicare patients by sex, 2024
- Women39162%
- Men24438%
Chronic conditions among Dr. Mathias' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes57%
- Arthritis42%
- Heart failure41%
- Mood disorders29%
- Chronic kidney disease27%
- Bipolar disorder25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mathias' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 46
Patient panel by sex, all payers
- Women62%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Herman Mathias wrote 7,940 Medicare Part D claims in 2024
In 2024, Dr. Mathias wrote 7,940 Medicare Part D claims for 901 patients. 85% of them were for generic drugs. CMS names the drug for 7,079 of them, across 121 drugs with 11 or more claims each, at $585,828 in total drug cost. In 2023, CMS named 6,662 claims across 118 drugs.
Dr. Mathias' Part D claims by kind of drug, 2024
- Generic6,725 claims85%
- Brand-name1,162 claims15%
- Other53 claims1%
Dr. Mathias' 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. Mathias' Part D claims, 2024
- Opioids10%816 of 7,940 claims
- Antibiotics3%202 of 7,940 claims
- Antipsychotics, patients 65 and over1%53 of 7,940 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: 6,6622024: 7,0796%
Drugs named by CMS: 121 in 2024, 118 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. Herman Mathias takes part in Medicare
Dr. Mathias 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. Herman Mathias received $7,483 in industry payments from 2016 to 2025
CMS Open Payments shows 436 general payments to Dr. Mathias from 46 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Amgen Inc. paid the most, $798.
General payments to Dr. Mathias by program year, 2016 to 2025
General payments to Dr. Mathias by kind, 2016 to 2025
- Food and beverage$7,40399%
- Education$811%
Companies that paid Dr. Mathias 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. Herman Mathias has 1 award and honors on record
Dmand AI lists 1 award for Dr. Mathias, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Mathias
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Herman Mathias graduated from Kasturba Medical College Manipal
Dr. Mathias graduated from Kasturba Medical College Manipal in 1977.
- Medical school
- Board certified in geriatric medicine
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Herman Mathias accepts plans from 13 insurance carriers
Dr. Mathias is in network with 13 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Humana
- Alliant Health Plans
- Blue Cross Blue Shield of Massachusetts
- HCSC
- +5 more carriersWith a free account
Plan types Dr. Mathias accepts, by number of carriers
- Medicare10
- PPO9
- HMO7
- POS5
- EPO3
Source: Dmand AI Insurance Network Data
Sources for Dr. Herman Mathias'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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Herman Mathias
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. Herman Mathias' NPI number?
Dr. Herman Mathias' NPI number is 1487767265. It was assigned on August 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Herman Mathias?
Dr. Herman Mathias is an internist in Hemet, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Herman Mathias practice?
Dr. Mathias practices at 391 N San Jacinto St, Hemet, CA 92543. Dr. Mathias' primary practice is Mathias Primary Care Associates, Inc in Hemet, California. Dmand AI also links Dr. Mathias to 3 home health agencies, 2 group practices and clinics and 2 medical groups.
What is Dr. Herman Mathias' office phone number?
The practice phone on file for Dr. Mathias is (951) 533-5123.
What is Dr. Herman Mathias' medical license number?
Dr. Mathias holds California license A41055, one of the licenses on file in 3 states.
Which states has Dr. Herman Mathias been licensed in?
Dmand AI has state licenses on file for Dr. Mathias in California (1984 to 2026), New York (1984 to 2008) and Pennsylvania (1980 to 1984).
What medical group is Dr. Herman Mathias part of?
Dr. Mathias is linked to Apex Healthcare Medical Center. Dmand AI links Dr. Mathias to 2 more medical groups.
Does Dr. Herman Mathias accept Medicare?
Yes. CMS data shows Dr. Mathias billed Medicare for 2,712 services in 2024, and Dr. Mathias accepts Medicare assignment.
How many Medicare patients does Dr. Herman Mathias see?
CMS counts 635 Medicare patients who saw Dr. Mathias in 2024, with an average age of 73.
Is Dr. Herman Mathias board certified?
Yes. Dr. Mathias is board certified in geriatric medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Herman Mathias bill to Medicare?
In 2024, Dr. Mathias' most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and office visit, established patient (99213).
Where did Dr. Herman Mathias go to medical school?
Dr. Mathias graduated from Kasturba Medical College Manipal in 1977.
What drugs does Dr. Herman Mathias prescribe most?
In 2024 Medicare Part D data, Dr. Mathias' most prescribed drugs by claims were Hydrocodone-Acetaminophen, Atorvastatin Calcium and Levothyroxine Sodium.
Has Dr. Herman Mathias received payments from drug or device companies?
CMS Open Payments shows $7,483 in general payments to Dr. Mathias from 46 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. Herman Mathias been practicing?
Dr. Mathias graduated from medical school in 1977, 49 years ago.
What insurance does Dr. Herman Mathias accept?
Dr. Mathias is in network with 13 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
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