J Am Acad Dermatol
Diagnosis, DifferentialHemangiomaMyositis
Dr. John L. Maddox, MD
NPI1790837508
- Medicare services, 2020
- 286
- Part D claims, 2020
- 75
- Publications
- 2
- Industry payments
- $331
- State license
- 1
- Practice address
- CA
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Maddox's professional email, personal email and mobile number
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Dr. John L. Maddox is a dermatologist in California
Dr. Maddox practices in California.
Dr. Maddox's NPI, 1790837508, was assigned on January 18, 2007. Dr. Maddox graduated from Medical College of Georgia in 1974. Dr. Maddox holds California license G40606.
NPI and contact details
- NPI
- 1790837508NPI Registry (opens in a new tab)
- NPI enumeration date
- January 18, 2007
- NPI status
- Active
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1974
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dmand AI tracks the EHR system at Dr. John L. Maddox's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maddox practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Maddox's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John L. Maddox is one of 1,910 dermatologists in California
Dermatology is Dr. Maddox's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Maddox is board certified in dermatology by the American Board of Dermatology. Dr. Maddox is licensed in California.
Specialties and state licenses
- Dermatology, CaliforniaPrimary
Dermatologists near Dr. Maddox
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. John L. Maddox billed Medicare for 286 services in 2020
CMS data shows 286 Medicare services from Dr. Maddox across 7 procedure codes in 2020. Medicare paid $7,737 for them. Every service was in an office.
Medicare services, 2020286
Paid by Medicare$7,737
Procedure codes7
Dr. Maddox's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Surgery
- 2019: 6562020: 15676%
- Office and hospital visits
- 2019: 6622020: 13080%
- Drugs given in the office
- 2019: 232020: 0100%
Dr. Maddox compared with the California median for dermatologists, 2020
- Dr. Maddox
- California median
- Medicare services
- 286vs 1,75084% below
- Part D claims
- 75vs 36780% below
Medians across 1,831 dermatologists in California with Dmand AI profiles that report each measure.
Dr. Maddox's most billed Medicare procedure codes, 2020
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Maddox and other dermatologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John L. Maddox's patients have a median age of 71
Across all payers, Dmand AI patient panel data puts Dr. Maddox's median patient age at 71, with 57% women.
Dr. Maddox's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women57%
- Men43%
Source: Dmand AI Patient Panel Data
Dr. John L. Maddox wrote 75 Medicare Part D claims in 2020
In 2020, Dr. Maddox wrote 75 Medicare Part D claims. Every claim was for a generic drug. They cover 4 drugs, with $2,597 in total drug cost. In 2019, CMS named 334 claims across 12 drugs.
Part D claims, 202075
Drugs named by CMS4
Total drug cost$2,597
Dr. Maddox's most prescribed drugs by claims, 2020
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, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 3342020: 7578%
Drugs named by CMS: 4 in 2020, 12 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. John L. Maddox has 2 publications on record
Dmand AI links 2 papers to Dr. Maddox.
Papers2
Recent publications by Dr. Maddox
AmyloidAmyloidosisHistocytochemistry
See who Dr. Maddox researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Maddox works with, so you can find a warm path to the right dermatologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John L. Maddox received $331 in industry payments from 2016 to 2019
CMS Open Payments shows 17 general payments to Dr. Maddox from 8 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 91% of the total. Novartis Pharmaceuticals Corporation paid the most, $102.
General payments to Dr. Maddox by program year, 2016 to 2019
General payments to Dr. Maddox by kind, 2016 to 2019
$331in total
- Food and beverage$30291%
- Education$309%
Companies that paid Dr. Maddox the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John L. Maddox has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Maddox, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Maddox
- 2011
- CMS Stage 1 2012
- Undated
- AAD Fellow
Source: Dmand AI Professional Profile Data
Dr. John L. Maddox graduated from Medical College of Georgia
Dr. Maddox graduated from Medical College of Georgia in 1974. Dr. Maddox is a member of AAD.
- Medical school
- Board certified in dermatology
- Board certified in pediatrics
Source: Dmand AI Professional Profile Data
Sources for Dr. John L. Maddox'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 |
| 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) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile 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. John L. Maddox
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. John L. Maddox's NPI number?
Dr. John L. Maddox's NPI number is 1790837508. It was assigned on January 18, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. John L. Maddox?
Dr. John L. Maddox is a dermatologist in California. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
What is Dr. John L. Maddox's medical license number?
Dr. Maddox holds California license G40606.
Does Dr. John L. Maddox accept Medicare?
Yes. CMS data shows Dr. Maddox billed Medicare for 286 services in 2020.
Is Dr. John L. Maddox board certified?
Yes. Dr. Maddox is board certified in dermatology by the American Board of Dermatology.
What services does Dr. John L. Maddox bill to Medicare?
In 2020, Dr. Maddox's most billed Medicare services were surgery: skin and soft tissue (17003), office visit, established patient (99213) and surgery: skin and soft tissue (17000).
Where did Dr. John L. Maddox go to medical school?
Dr. Maddox graduated from Medical College of Georgia in 1974.
What drugs does Dr. John L. Maddox prescribe most?
In 2020 Medicare Part D data, Dr. Maddox's most prescribed drugs by claims were Triamcinolone Acetonide, Ketoconazole and Fluocinonide.
Has Dr. John L. Maddox received payments from drug or device companies?
CMS Open Payments shows $331 in general payments to Dr. Maddox from 8 companies from 2016 to 2019. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. John L. Maddox been practicing?
Dr. Maddox graduated from medical school in 1974, 52 years ago.
Does Dr. John L. Maddox do research?
Dmand AI links 2 publications to Dr. Maddox.
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