Dr. Leon Gordon Clark Jr., MD

  • Castro Valley, CA
  • Dermatologist
NPI1487004370PAC ID1759644339
Medicare services, 2024
11
Medicare patients, 2024
31
Part D claims, 2024
522
Publications
7
MIPS score, 2024
95
Practice address
15400 Foothill Blvd, Castro Valley, CA 94578
Practice phone
Call (510) 895-7230
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

San Leandro Hospital Rehab

Castro Valley, California

See all 10 affiliations

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Dr. Leon Gordon Clark Jr. is a dermatologist in Castro Valley, California

Dr. Clark practices at San Leandro Hospital Rehab in Castro Valley, California.

Dr. Clark's NPI, 1487004370, was assigned on June 21, 2016. Dr. Clark graduated from Mayo Clinic Alix School of Medicine - Rochester in 2016. Dr. Clark holds California license A153921.

NPI and contact details
Medicare PAC ID
1759644339
NPI enumeration date
June 21, 2016
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(510) 895-7230
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
36
Medical school graduation
2016

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Leon Gordon Clark Jr. practices at San Leandro Hospital Rehab in Castro Valley, California

Dr. Clark's primary practice is San Leandro Hospital Rehab, at 15400 Foothill Blvd, Castro Valley, CA 94578 in Alameda County. The practice phone is (510) 895-7230.

  • San Leandro Hospital Rehab
    15400 Foothill Blvd, Castro Valley, CA 94578 · Alameda CountyPhone(510) 895-7230

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Leon Gordon Clark Jr. is affiliated with 5 sites of care and 5 medical groups

Dr. Clark's primary practice is San Leandro Hospital Rehab in Castro Valley, California. Dr. Clark is also affiliated with Eisenhower Health. The medical group on file is UCSF Medical Group. Dmand AI also links Dr. Clark to 2 more hospitals, 4 medical groups and 1 group practice or clinic, each named with a free account.

See all 10 affiliations for Dr. Clark

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Leon Gordon Clark Jr.'s practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Clark practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
San Leandro Hospital RehabAvailable with a free account
+4 more sites and 4 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Leon Gordon Clark Jr. is one of 1,910 dermatologists in California

Dermatology is Dr. Clark's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Clark is board certified in dermatology by the American Board of Dermatology. Dr. Clark is licensed in California.

Specialties and state licenses

  • Dermatology, CaliforniaPrimaryLicense A153921 · 2018 to 2026 · taxonomy 207N00000X

Clinical focus

Dmand AI lists benign or precancerous skin growths, cold sores or genital herpes, contact dermatitis, hives, itchy rashes, psoriasis, rash and scalp rash among the conditions Dr. Clark treats.

Dermatologists near Dr. Clark

Counts of dermatologists 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. Leon Gordon Clark Jr. billed Medicare for 11 services in 2024

CMS data shows 11 Medicare services from Dr. Clark across 1 procedure code in 2024, for 31 Medicare patients. Medicare paid $887 for them. Every service was in an office.

Medicare services, 202411
Medicare patients31
Paid by Medicare$887
Procedure codes1

Dr. Clark's Medicare services by type, 2022 to 2024

  • 2022
  • 2024
Office and hospital visits
2022: 332024: 1167%

Dr. Clark compared with the California median for dermatologists, 2024

  • Dr. Clark
  • California median
Medicare services
11vs 1,75099% below
Medicare patients
31vs 37792% below
Part D claims
398vs 3678% above

Medians across 1,831 dermatologists 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.

See all procedures by Dr. Clark

Need commercial claims for Dr. Clark?

Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Clark and other dermatologists in California.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Leon Gordon Clark Jr. treated 31 Medicare patients in 2024, average age 68

CMS counts 31 Medicare patients who saw Dr. Clark in 2024. The largest group is 65 to 74, with 13 patients. 75% of them have high blood pressure, and 52% have high cholesterol. Their average risk score is 2.53, 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 55, with 49% women.

Medicare patients, 202431
Average age68
Average risk score2.53

Dr. Clark's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Clark's Medicare patients by sex, 2024

  • Women1445%
  • Men1755%

Chronic conditions among Dr. Clark's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol52%
  3. Diabetes45%
  4. Chronic kidney disease42%

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 55

Patient panel by sex, all payers

  • Women49%
  • Men49%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Leon Gordon Clark Jr. wrote 522 Medicare Part D claims in 2024

In 2024, Dr. Clark wrote 522 Medicare Part D claims for 106 patients. 68% of them were for generic drugs. CMS names the drug for 398 of them, across 15 drugs with 11 or more claims each, at $842,615 in total drug cost. In 2023, CMS named 495 claims across 15 drugs.

Part D claims, 2024522
Drugs named by CMS15
Total drug cost$842,615
Part D patients106

Dr. Clark's Part D claims by kind of drug, 2024

  • Generic357 claims68%
  • Brand-name and other165 claims32%

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.

Drug classes CMS tracks in Dr. Clark's Part D claims, 2024

  • Antibiotics5%25 of 522 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: 4952024: 39820%

Drugs named by CMS: 15 in 2024, 15 in 2023.

See all prescribing by Dr. Clark

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. Leon Gordon Clark Jr. scored 95 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Clark for performance year 2024, reported as part of a group. Dr. Clark accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Clark as offering telehealth. CMS counts 87 procedures of removal of skin lesions by Dr. Clark, more than 75% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Clark's MIPS scores, performance year 2024

  • 95of 100Final score
  • 86.9of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 73of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Where Dr. Clark ranks in Medicare procedure volume

Removal of skin lesions
75th percentile87 procedures
Skin biopsy
62nd percentile16 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)

Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)

Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)

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Dr. Leon Gordon Clark Jr. has 7 publications on record

Dmand AI links 7 papers to Dr. Clark, published from 2013 to 2023. 2016 was the busiest year, with 2. Dr. Clark's most frequent co-authors are Erin Huiras Amerson, MD, Michael L. Camilleri, MD and Michael Joseph Camilleri, MD.

Papers7
Years published2013 to 2023

Dr. Clark's papers by year, 2013 to 2023

Dr. Clark's most frequent co-authors

Recent publications by Dr. Clark

See all 7 publications and co-authors

See who Dr. Clark researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Clark works with, so you can find a warm path to the right dermatologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Leon Gordon Clark Jr. received $15,227 in industry payments from 2023 to 2025

CMS Open Payments shows 30 general payments to Dr. Clark from 6 drug and device companies from 2023 to 2025. Speaker and faculty fees make up the largest share, 81% of the total. Galderma Laboratories, L.P. paid the most, $12,499.

General payments to Dr. Clark by program year, 2023 to 2025

General payments to Dr. Clark by kind, 2023 to 2025

$15.2Kin total
  • Speaker and faculty fees$12,30081%
  • Consulting fees$2,20514%
  • Food and beverage$7115%
  • Education$100%

Companies that paid Dr. Clark the most, 2023 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Clark

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Leon Gordon Clark Jr. graduated from Mayo Clinic Alix School of Medicine - Rochester

Dr. Clark graduated from Mayo Clinic Alix School of Medicine - Rochester in 2016.

  1. Medical schoolMayo Clinic Alix School of Medicine - Rochester
  2. Board certified in dermatologyAmerican Board of Dermatology

Source: Dmand AI Professional Profile Data

Dr. Leon Gordon Clark Jr. accepts plans from 15 insurance carriers

Dr. Clark is in network with 15 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO 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
  • HCSC
  • Alliant Health Plans
  • Blue Cross Blue Shield of Massachusetts
  • Regence Health Plans
  • +7 more carriersWith a free account

Plan types Dr. Clark accepts, by number of carriers

  1. PPO10
  2. Medicare8
  3. HMO6
  4. POS6
  5. EPO4

Source: Dmand AI Insurance Network Data

Sources for Dr. Leon Gordon Clark Jr.'s profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Leon Gordon Clark Jr.

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. Leon Gordon Clark Jr.'s NPI number?

Dr. Leon Gordon Clark Jr.'s NPI number is 1487004370. It was assigned on June 21, 2016, and it is active in the NPI Registry.

What kind of doctor is Dr. Leon Gordon Clark Jr.?

Dr. Leon Gordon Clark Jr. is a dermatologist in Castro Valley, California. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).

Where does Dr. Leon Gordon Clark Jr. practice?

Dr. Clark practices at 15400 Foothill Blvd, Castro Valley, CA 94578. Dr. Clark's primary practice is San Leandro Hospital Rehab in Castro Valley, California. Dmand AI also links Dr. Clark to 2 hospitals, 4 medical groups and 1 group practice or clinic.

What is Dr. Leon Gordon Clark Jr.'s office phone number?

The practice phone on file for Dr. Clark is (510) 895-7230.

What is Dr. Leon Gordon Clark Jr.'s medical license number?

Dr. Clark holds California license A153921.

Which hospitals is Dr. Leon Gordon Clark Jr. affiliated with?

Dr. Clark is affiliated with Eisenhower Health. Dmand AI links Dr. Clark to 2 more hospitals.

What medical group is Dr. Leon Gordon Clark Jr. part of?

Dr. Clark is linked to UCSF Medical Group. Dmand AI links Dr. Clark to 4 more medical groups.

Does Dr. Leon Gordon Clark Jr. accept Medicare?

Yes. CMS data shows Dr. Clark billed Medicare for 11 services in 2024, and Dr. Clark accepts Medicare assignment.

Does Dr. Leon Gordon Clark Jr. offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Clark as offering telehealth services.

What is Dr. Leon Gordon Clark Jr.'s MIPS score?

Dr. Clark's MIPS final score for performance year 2024 is 95 out of 100, reported as part of a group.

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. Leon Gordon Clark Jr. see?

CMS counts 31 Medicare patients who saw Dr. Clark in 2024, with an average age of 68.

Is Dr. Leon Gordon Clark Jr. board certified?

Yes. Dr. Clark is board certified in dermatology by the American Board of Dermatology.

What services does Dr. Leon Gordon Clark Jr. bill to Medicare?

In 2024, Dr. Clark's most billed Medicare services were care management and other visits (99442).

Where did Dr. Leon Gordon Clark Jr. go to medical school?

Dr. Clark graduated from Mayo Clinic Alix School of Medicine - Rochester in 2016.

What drugs does Dr. Leon Gordon Clark Jr. prescribe most?

In 2024 Medicare Part D data, Dr. Clark's most prescribed drugs by claims were Dupixent Pen, Triamcinolone Acetonide and Fluocinonide.

Has Dr. Leon Gordon Clark Jr. received payments from drug or device companies?

CMS Open Payments shows $15,227 in general payments to Dr. Clark from 6 companies from 2023 to 2025. The largest total came from Galderma Laboratories, L.P.

How long has Dr. Leon Gordon Clark Jr. been practicing?

Dr. Clark graduated from medical school in 2016, 10 years ago.

Does Dr. Leon Gordon Clark Jr. do research?

Dmand AI links 7 publications to Dr. Clark, published from 2013 to 2023.

Who does Dr. Leon Gordon Clark Jr. publish with?

Dr. Clark's most frequent co-authors are Erin Huiras Amerson, MD (1 shared paper), Michael L. Camilleri, MD (1 shared paper) and Michael Joseph Camilleri, MD (1 shared paper).

What insurance does Dr. Leon Gordon Clark Jr. accept?

Dr. Clark is in network with 15 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.

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