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Dr. David Kenneth Trefflich, MD
NPI1861836942PAC ID7810125325
- Medicare services, 2024
- 187
- Medicare patients, 2024
- 128
- Part D claims, 2024
- 3,628
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 430 S Blosser Road, Santa Maria, CA 93458
- Practice phone
- Call (805) 931-2510
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Santa Maria - Del Valle
FQHC - Main Site · Santa Maria, California
Find Dr. Trefflich'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. David Kenneth Trefflich is an internist in Santa Maria, California
Dr. Trefflich practices at Santa Maria - Del Valle in Santa Maria, California.
Dr. Trefflich's NPI, 1861836942, was assigned on April 19, 2013. Dr. Trefflich graduated from UC Irvine School of Medicine in 2013. Dr. Trefflich holds California license A170337.
NPI and contact details
- NPI
- 1861836942NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7810125325
- NPI enumeration date
- April 19, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 931-2510
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Kenneth Trefflich practices at Santa Maria - Del Valle in Santa Maria, California
Dr. Trefflich's primary practice is Santa Maria - Del Valle, at 430 S Blosser Road, Santa Maria, CA 93458 in Santa Barbara County. The practice phone is (805) 931-2510.
- Santa Maria - Del Valle430 S Blosser Road, Santa Maria, CA 93458 · Santa Barbara CountyPhone(805) 931-2510
Source: Dmand AI Affiliation Data
Dr. David Kenneth Trefflich is affiliated with 4 sites of care and 1 medical group
Dr. Trefflich's primary practice is Santa Maria - Del Valle in Santa Maria, California. Dr. Trefflich is also affiliated with Dignity Health - Marian Regional Medical Center. The medical group on file is Community Health Centers of the Central Coast, Inc. Dmand AI also links Dr. Trefflich to 2 more home health agencies, each named with a free account.
Santa Maria - Del VallePrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. David Kenneth Trefflich's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Trefflich practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Santa Maria - Del Valle | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David Kenneth Trefflich is one of 16,751 internists in California
Internal medicine is Dr. Trefflich's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Trefflich is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Trefflich's licenses on file in 3 states: California, Nebraska and Ohio.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Nebraska license
- Ohio license
Clinical focus
Dmand AI lists acid reflux, acute kidney failure, acute skin infection, adjustment disease, aneurysm, arthritis, asthma and atrial fibrillation and flutter among the conditions Dr. Trefflich treats.
Internists near Dr. Trefflich
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. David Kenneth Trefflich billed Medicare for 187 services in 2024
CMS data shows 187 Medicare services from Dr. Trefflich across 3 procedure codes in 2024, for 128 Medicare patients. Medicare paid $1,349 for them. Every service was in an office.
Medicare services, 2024187
Medicare patients128
Paid by Medicare$1,349
Procedure codes3
Dr. Trefflich's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 1112024: 14531%
- Imaging
- 2023: 182024: 3172%
- Tests and treatments
- 2023: 142024: 1121%
Dr. Trefflich compared with the California median for internists, 2024
- Dr. Trefflich
- California median
- Medicare services
- 187vs 36148% below
- Medicare patients
- 128vs 15115% below
- Part D claims
- 3,082vs 4217.3 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Trefflich'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.
Need commercial claims for Dr. Trefflich?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Trefflich and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David Kenneth Trefflich treated 128 Medicare patients in 2024, average age 69
CMS counts 128 Medicare patients who saw Dr. Trefflich in 2024. The largest group is 65 to 74, with 71 patients. 75% of them have high blood pressure, and 70% have diabetes. 88% are also on Medicaid. Their average risk score is 1.44, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Trefflich's median patient age at 59, with 55% women.
Medicare patients, 2024128
Average age69
Average risk score1.44
Also on Medicaid88%
Dr. Trefflich's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Trefflich's Medicare patients by sex, 2024
- Women5039%
- Men7861%
Chronic conditions among Dr. Trefflich's Medicare patients, 2024
- High blood pressure75%
- Diabetes70%
- High cholesterol54%
- Arthritis30%
- Mood disorders30%
- Depression27%
- Anxiety21%
- Ischemic heart disease17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Trefflich's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David Kenneth Trefflich wrote 3,628 Medicare Part D claims in 2024
In 2024, Dr. Trefflich wrote 3,628 Medicare Part D claims for 282 patients. 82% of them were for generic drugs. CMS names the drug for 3,082 of them, across 68 drugs with 11 or more claims each, at $341,858 in total drug cost. In 2023, CMS named 2,489 claims across 64 drugs.
Part D claims, 20243,628
Drugs named by CMS68
Total drug cost$341,858
Part D patients282
Dr. Trefflich's Part D claims by kind of drug, 2024
- Generic2,971 claims82%
- Brand-name607 claims17%
- Other50 claims1%
Dr. Trefflich'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. Trefflich's Part D claims, 2024
- Opioids1%42 of 3,628 claims
- Antibiotics0%17 of 3,628 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: 2,4892024: 3,08224%
Drugs named by CMS: 68 in 2024, 64 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. David Kenneth Trefflich takes part in Medicare
Dr. Trefflich 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. David Kenneth Trefflich has 1 publication on record
Dmand AI links 1 paper to Dr. Trefflich in 2012. Dr. Trefflich's most frequent co-author is Mark Allen Rosen, MD.
Papers1
Dr. Trefflich's most frequent co-authors
Recent publications by Dr. Trefflich
See who Dr. Trefflich researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Trefflich works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. David Kenneth Trefflich received $375 in industry payments from 2016 to 2025
CMS Open Payments shows 15 general payments to Dr. Trefflich from 8 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Sanofi and Genzyme US Companies paid the most, $100.
General payments to Dr. Trefflich by program year, 2016 to 2025
Companies that paid Dr. Trefflich 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. David Kenneth Trefflich graduated from UC Irvine School of Medicine
Dr. Trefflich graduated from UC Irvine School of Medicine in 2013.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. David Kenneth Trefflich accepts plans from 14 insurance carriers
Dr. Trefflich is in network with 14 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. Trefflich accepts, by number of carriers
- PPO9
- HMO6
- Medicare6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. David Kenneth Trefflich'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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. David Kenneth Trefflich
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. David Kenneth Trefflich's NPI number?
Dr. David Kenneth Trefflich's NPI number is 1861836942. It was assigned on April 19, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. David Kenneth Trefflich?
Dr. David Kenneth Trefflich is an internist in Santa Maria, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. David Kenneth Trefflich practice?
Dr. Trefflich practices at 430 S Blosser Road, Santa Maria, CA 93458. Dr. Trefflich's primary practice is Santa Maria - Del Valle in Santa Maria, California. Dmand AI also links Dr. Trefflich to 2 home health agencies.
What is Dr. David Kenneth Trefflich's office phone number?
The practice phone on file for Dr. Trefflich is (805) 931-2510.
What is Dr. David Kenneth Trefflich's medical license number?
Dr. Trefflich holds California license A170337, one of the licenses on file in 3 states.
Which states has Dr. David Kenneth Trefflich been licensed in?
Dmand AI has state licenses on file for Dr. Trefflich in California (2020 to 2026), Nebraska (2015 to 2021) and Ohio (2013 to 2016).
Which hospitals is Dr. David Kenneth Trefflich affiliated with?
Dr. Trefflich is affiliated with Dignity Health - Marian Regional Medical Center.
What medical group is Dr. David Kenneth Trefflich part of?
Dr. Trefflich is linked to Community Health Centers of the Central Coast, Inc.
Does Dr. David Kenneth Trefflich accept Medicare?
Yes. CMS data shows Dr. Trefflich billed Medicare for 187 services in 2024, and Dr. Trefflich accepts Medicare assignment.
How many Medicare patients does Dr. David Kenneth Trefflich see?
CMS counts 128 Medicare patients who saw Dr. Trefflich in 2024, with an average age of 69.
Show 9 more questionsShow fewer questions
Is Dr. David Kenneth Trefflich board certified?
Yes. Dr. Trefflich is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. David Kenneth Trefflich bill to Medicare?
In 2024, Dr. Trefflich's most billed Medicare services were lab and pathology test (83036), diagnostic imaging (71046) and heart test or procedure (93005).
Where did Dr. David Kenneth Trefflich go to medical school?
Dr. Trefflich graduated from UC Irvine School of Medicine in 2013.
What drugs does Dr. David Kenneth Trefflich prescribe most?
In 2024 Medicare Part D data, Dr. Trefflich's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Lisinopril.
Has Dr. David Kenneth Trefflich received payments from drug or device companies?
CMS Open Payments shows $375 in general payments to Dr. Trefflich from 8 companies from 2016 to 2025. The largest total came from Sanofi and Genzyme US Companies.
How long has Dr. David Kenneth Trefflich been practicing?
Dr. Trefflich graduated from medical school in 2013, 13 years ago.
Does Dr. David Kenneth Trefflich do research?
Dmand AI links 1 publication to Dr. Trefflich.
Who does Dr. David Kenneth Trefflich publish with?
Dr. Trefflich's most frequent co-authors are Mark Allen Rosen, MD (1 shared paper).
What insurance does Dr. David Kenneth Trefflich accept?
Dr. Trefflich is in network with 14 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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