Dr. Jack Douglas Clark, MD
- Medicare services, 2024
- 485
- Medicare patients, 2024
- 188
- Part D claims, 2024
- 765
- Industry payments
- $361
- Affiliated sites
- 2
- Practice address
- 3875 W Beechwood Ave, Fresno, CA 93711
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
United Health Centers Corporate Offices
FQHC - Satellite Clinic · Fresno, California
Find Dr. Clark'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. Jack Douglas Clark is an ophthalmologist in Fresno, California
Dr. Clark practices at United Health Centers Corporate Offices in Fresno, California.
Dr. Clark's NPI, 1265571608, was assigned on February 5, 2007. Dr. Clark graduated from Keck School of Medicine of USC in 1984. Dr. Clark's California license number on file is G56196.
- NPI
- 1265571608NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426112533
- NPI enumeration date
- February 5, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jack Douglas Clark practices at United Health Centers Corporate Offices in Fresno, California
Dr. Clark's primary practice is United Health Centers Corporate Offices, at 3875 W Beechwood Ave, Fresno, CA 93711 in Fresno County.
- United Health Centers Corporate Offices3875 W Beechwood Ave, Fresno, CA 93711 · Fresno County
Source: Dmand AI Affiliation Data
Dr. Jack Douglas Clark is affiliated with 2 sites of care and 3 medical groups
Dr. Clark's primary practice is United Health Centers Corporate Offices in Fresno, California. The medical group on file is Camarena Health. Dmand AI also links Dr. Clark to 2 more medical groups and 1 community health center, each named with a free account. Dr. Clark's employer is on file too: a community health center (fqhc).
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Jack Douglas Clark's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Clark practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| United Health Centers Corporate Offices | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jack Douglas Clark is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Clark's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Clark is board certified in ophthalmology by the American Board of Ophthalmology. Dr. Clark has a license on file in California.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
Clinical focus
Dmand AI lists age-related macular degeneration, cataract, cataract surgery with lens implant, conjunctivitis, dry eye, eye infection or inflammation, eyelid inflammation and glaucoma among the conditions Dr. Clark treats.
Ophthalmologists near Dr. Clark
Counts of ophthalmologists 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. Jack Douglas Clark billed Medicare for 485 services in 2024
CMS data shows 485 Medicare services from Dr. Clark across 8 procedure codes in 2024, for 188 Medicare patients. Medicare paid $40,945 for them.
Dr. Clark's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 2982024: 24019%
- Surgery
- 2023: 1392024: 11319%
- Drugs given in the office
- 2023: 982024: 8117%
- Office and hospital visits
- 2023: 222024: 3350%
- Imaging
- 2023: 212024: 1814%
Where Dr. Clark's Medicare services took place, 2024
- In an office45694%
- In a facility296%
Dr. Clark compared with the California median for ophthalmologists, 2024
- Dr. Clark
- California median
- Medicare services
- 485vs 1,07955% below
- Medicare patients
- 188vs 42155% below
- Part D claims
- 723vs 61817% above
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Clark'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. Clark?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Clark and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jack Douglas Clark treated 188 Medicare patients in 2024, average age 74
CMS counts 188 Medicare patients who saw Dr. Clark in 2024. The largest group is 65 to 74, with 77 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 52% are also on Medicaid. Their average risk score is 1.62, 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. Clark's median patient age at 63, with 55% women.
Dr. Clark's Medicare patients by age, 2024
Dr. Clark's Medicare patients by sex, 2024
- Women10656%
- Men8244%
Chronic conditions among Dr. Clark's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes45%
- Arthritis39%
- Ischemic heart disease35%
- Chronic kidney disease34%
- Heart failure23%
- Asthma16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Clark's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
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. Jack Douglas Clark wrote 765 Medicare Part D claims in 2024
In 2024, Dr. Clark wrote 765 Medicare Part D claims for 171 patients. 77% of them were for generic drugs. CMS names the drug for 723 of them, across 10 drugs with 11 or more claims each, at $26,957 in total drug cost. In 2023, CMS named 787 claims across 11 drugs.
Dr. Clark's Part D claims by kind of drug, 2024
- Generic588 claims77%
- Brand-name177 claims23%
Dr. Clark'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 7872024: 7238%
Drugs named by CMS: 10 in 2024, 11 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. Jack Douglas Clark ranks in the 45th percentile for cataract surgery in Medicare
Dr. Clark accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 20 procedures of cataract surgery by Dr. Clark, more than 45% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Clark ranks in Medicare procedure volume
- Cataract surgery
- 45th percentile20 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Jack Douglas Clark received $361 in industry payments from 2019 to 2025
CMS Open Payments shows 5 general payments to Dr. Clark from 4 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $125.
General payments to Dr. Clark by program year, 2019 to 2025
Companies that paid Dr. Clark the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jack Douglas Clark graduated from Keck School of Medicine of USC
Dr. Clark graduated from Keck School of Medicine of USC in 1984.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Jack Douglas Clark accepts plans from 16 insurance carriers
Dr. Clark is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- Elevance
- HCSC
- Humana
- Regence Health Plans
- +8 more carriersWith a free account
Plan types Dr. Clark accepts, by number of carriers
- PPO10
- Medicare9
- HMO8
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Jack Douglas Clark'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 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)Doctors and Clinicians Utilization Data (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. Jack Douglas Clark
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. Jack Douglas Clark's NPI number?
Dr. Jack Douglas Clark's NPI number is 1265571608. It was assigned on February 5, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Jack Douglas Clark?
Dr. Jack Douglas Clark is an ophthalmologist in Fresno, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Jack Douglas Clark practice?
Dr. Clark practices at 3875 W Beechwood Ave, Fresno, CA 93711. Dr. Clark's primary practice is United Health Centers Corporate Offices in Fresno, California. Dmand AI also links Dr. Clark to 2 medical groups and 1 community health center.
What is Dr. Jack Douglas Clark's medical license number?
Dr. Clark's California license number on file is G56196.
What medical group is Dr. Jack Douglas Clark part of?
Dr. Clark is linked to Camarena Health. Dmand AI links Dr. Clark to 2 more medical groups.
Does Dr. Jack Douglas Clark accept Medicare?
Yes. CMS data shows Dr. Clark billed Medicare for 485 services in 2024, and Dr. Clark accepts Medicare assignment.
How many Medicare patients does Dr. Jack Douglas Clark see?
CMS counts 188 Medicare patients who saw Dr. Clark in 2024, with an average age of 74.
Is Dr. Jack Douglas Clark board certified?
Yes. Dr. Clark is board certified in ophthalmology by the American Board of Ophthalmology.
What services does Dr. Jack Douglas Clark bill to Medicare?
In 2024, Dr. Clark's most billed Medicare services were eye exam or test (92012), surgery: eye (67028) and injected or infused drug (J7999).
Where did Dr. Jack Douglas Clark go to medical school?
Dr. Clark graduated from Keck School of Medicine of USC in 1984.
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What drugs does Dr. Jack Douglas Clark prescribe most?
In 2024 Medicare Part D data, Dr. Clark's most prescribed drugs by claims were Latanoprost, Neomycin-Polymyxin-Dexameth and Timolol Maleate.
Has Dr. Jack Douglas Clark received payments from drug or device companies?
CMS Open Payments shows $361 in general payments to Dr. Clark from 4 companies from 2019 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. Jack Douglas Clark been practicing?
Dr. Clark graduated from medical school in 1984, 42 years ago.
What insurance does Dr. Jack Douglas Clark accept?
Dr. Clark is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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