Dr. Duane Ray Darnell, DO
- Medicare services, 2021
- 222
- Part D claims, 2024
- 2,037
- Industry payments
- $845
- Affiliated sites
- 1
- Insurance carriers
- 4
- Practice address
- 8630 N Tamarack Ave, Sun Valley, CA 91352
- Practice phone
- Call (800) 608-0311
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Firstmed Ambulance Services, Inc.
Sun Valley, California
Find Dr. Darnell'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. Duane Ray Darnell is an internist in Sun Valley, California
Dr. Darnell practices at Firstmed Ambulance Services, Inc. in Sun Valley, California.
Dr. Darnell's NPI, 1831199728, was assigned on July 21, 2005. Dr. Darnell graduated from Kansas City University of Medicine and Biosciences College of Osteopathic Medicine in 1969. Dr. Darnell holds California license 20A4863.
- NPI
- 1831199728NPI Registry (opens in a new tab)
- NPI enumeration date
- July 21, 2005
- NPI status
- Active
- Practice phone
- (800) 608-0311
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 83
- Medical school graduation
- 1969
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Duane Ray Darnell practices at Firstmed Ambulance Services, Inc. in Sun Valley, California
Dr. Darnell's primary practice is Firstmed Ambulance Services, Inc., at 8630 N Tamarack Ave, Sun Valley, CA 91352 in Los Angeles County. The practice phone is (800) 608-0311.
- Firstmed Ambulance Services, Inc.8630 N Tamarack Ave, Sun Valley, CA 91352 · Los Angeles CountyPhone(800) 608-0311
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Duane Ray Darnell is affiliated with 2 sites of care
Dr. Darnell's primary practice is Firstmed Ambulance Services, Inc. in Sun Valley, California. Dmand AI also links Dr. Darnell to 1 physician office, 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. Duane Ray Darnell's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Darnell practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Firstmed Ambulance Services, Inc. | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Duane Ray Darnell is one of 16,751 internists in California
Internal medicine is Dr. Darnell's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Darnell is board certified in 1987 - 2025 by the AZ State License. Dr. Darnell is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Darnell
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. Duane Ray Darnell billed Medicare for 222 services in 2021
CMS data shows 222 Medicare services from Dr. Darnell across 4 procedure codes in 2021. Medicare paid $7,673 for them. Every service was in an office.
Dr. Darnell's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 1922021: 14027%
- Drugs given in the office
- 2020: 1542021: 7055%
- Other services
- 2020: 512021: 1276%
- Tests and treatments
- 2020: 472021: 0100%
- Surgery
- 2020: 322021: 0100%
Dr. Darnell compared with the California median for internists, 2021
- Dr. Darnell
- California median
- Medicare services
- 222vs 36139% below
- Part D claims
- 1,503vs 4213.6 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Darnell's most billed Medicare procedure codes, 2021
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. Darnell?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Darnell and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Duane Ray Darnell's patients have a median age of 82
Across all payers, Dmand AI patient panel data puts Dr. Darnell's median patient age at 82, with 61% women.
Dr. Darnell's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 82
Patient panel by sex, all payers
- Women61%
- Men38%
Source: Dmand AI Patient Panel Data
Dr. Duane Ray Darnell wrote 2,037 Medicare Part D claims in 2024
In 2024, Dr. Darnell wrote 2,037 Medicare Part D claims for 290 patients. 87% of them were for generic drugs. CMS names the drug for 1,503 of them, across 37 drugs with 11 or more claims each, at $79,843 in total drug cost. In 2023, CMS named 3,947 claims across 89 drugs.
Dr. Darnell's Part D claims by kind of drug, 2024
- Generic1,771 claims87%
- Brand-name and other266 claims13%
Dr. Darnell'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. Darnell's Part D claims, 2024
- Opioids1%12 of 2,037 claims
- Antibiotics1%19 of 2,037 claims
- Antipsychotics, patients 65 and over1%30 of 2,037 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: 3,9472024: 1,50362%
Drugs named by CMS: 37 in 2024, 89 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. Duane Ray Darnell received $845 in industry payments from 2016 to 2024
CMS Open Payments shows 16 general payments to Dr. Darnell from 6 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $243.
General payments to Dr. Darnell by program year, 2016 to 2024
Companies that paid Dr. Darnell the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Duane Ray Darnell graduated from Kansas City University of Medicine and Biosciences College of Osteopathic Medicine
Dr. Darnell graduated from Kansas City University of Medicine and Biosciences College of Osteopathic Medicine in 1969. Dr. Darnell is a member of ACOI, ACP, AOA and Osteopathic physicians and surgeons of calif.
- Medical school
- Board certified in 1987 - 2025
- Board certified in 1983 - 2026
- Board certified in 1972 - 2025
Source: Dmand AI Professional Profile Data
Dr. Duane Ray Darnell accepts plans from 4 insurance carriers
Dr. Darnell is in network with 4 carriers, including Elevance, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
Plan types Dr. Darnell accepts, by number of carriers
- Medicare4
- PPO4
- HMO1
- Medicaid1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Duane Ray Darnell'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 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. Duane Ray Darnell
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. Duane Ray Darnell's NPI number?
Dr. Duane Ray Darnell's NPI number is 1831199728. It was assigned on July 21, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Duane Ray Darnell?
Dr. Duane Ray Darnell is an internist in Sun Valley, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Duane Ray Darnell practice?
Dr. Darnell practices at 8630 N Tamarack Ave, Sun Valley, CA 91352. Dr. Darnell's primary practice is Firstmed Ambulance Services, Inc. in Sun Valley, California. Dmand AI also links Dr. Darnell to 1 physician office.
What is Dr. Duane Ray Darnell's office phone number?
The practice phone on file for Dr. Darnell is (800) 608-0311.
What is Dr. Duane Ray Darnell's medical license number?
Dr. Darnell holds California license 20A4863.
Does Dr. Duane Ray Darnell accept Medicare?
Yes. CMS data shows Dr. Darnell billed Medicare for 222 services in 2021.
Is Dr. Duane Ray Darnell board certified?
Yes. Dr. Darnell is board certified in 1987 - 2025 by the AZ State License.
What services does Dr. Duane Ray Darnell bill to Medicare?
In 2021, Dr. Darnell's most billed Medicare services were office visit, established patient (99213), injected or infused drug (J3301) and office visit, established patient (99212).
Where did Dr. Duane Ray Darnell go to medical school?
Dr. Darnell graduated from Kansas City University of Medicine and Biosciences College of Osteopathic Medicine in 1969.
What drugs does Dr. Duane Ray Darnell prescribe most?
In 2024 Medicare Part D data, Dr. Darnell's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Losartan Potassium.
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Has Dr. Duane Ray Darnell received payments from drug or device companies?
CMS Open Payments shows $845 in general payments to Dr. Darnell from 6 companies from 2016 to 2024. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Duane Ray Darnell been practicing?
Dr. Darnell graduated from medical school in 1969, 57 years ago.
What insurance does Dr. Duane Ray Darnell accept?
Dr. Darnell is in network with 4 carriers, including Elevance, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
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