Int J Dermatol
Hand DermatosesKeratosis
Dr. Eric Alan Williams, MD
NPI1982825238PAC ID4284733379
- Part D claims, 2024
- 707
- Publications
- 1
- Affiliated sites
- 1
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 7373 West Ln, Stockton, CA 95210
- Practice phone
- Call (209) 476-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Permanente Medical Group Inc
Stockton, California
Find Dr. Williams' professional email, personal email and mobile number
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Dr. Eric Alan Williams is a dermatologist in Stockton, California
Dr. Williams practices at Permanente Medical Group Inc in Stockton, California.
Dr. Williams' NPI, 1982825238, was assigned on May 2, 2007. Dr. Williams graduated from Keck School of Medicine of USC in 2003. Dr. Williams holds California license A91611.
NPI and contact details
- NPI
- 1982825238NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4284733379
- NPI enumeration date
- May 2, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (209) 476-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Eric Alan Williams practices at Permanente Medical Group Inc in Stockton, California
Dr. Williams' primary practice is Permanente Medical Group Inc, at 7373 West Ln, Stockton, CA 95210 in San Joaquin County. The practice phone is (209) 476-2000.
- Permanente Medical Group Inc7373 West Ln, Stockton, CA 95210 · San Joaquin CountyPhone(209) 476-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Eric Alan Williams is affiliated with 2 sites of care and 1 medical group
Dr. Williams' primary practice is Permanente Medical Group Inc in Stockton, California. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Williams to 1 more group practice or clinic, named with a free account.
Permanente Medical Group IncPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Eric Alan Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Permanente Medical Group 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. Eric Alan Williams is one of 1,910 dermatologists in California
Dermatology is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Williams is board certified in dermatology by the American Board of Dermatology. Dr. Williams is licensed in California.
Specialties and state licenses
- Dermatology, CaliforniaPrimary
Dermatologists near Dr. Williams
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. Eric Alan Williams' patients have a median age of 58
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 58, with 55% women.
Dr. Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women55%
- Men44%
Source: Dmand AI Patient Panel Data
Dr. Eric Alan Williams wrote 707 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 707 Medicare Part D claims for 320 patients. 76% of them were for generic drugs. CMS names the drug for 585 of them, across 18 drugs with 11 or more claims each, at $312,477 in total drug cost. In 2023, CMS named 508 claims across 17 drugs.
Part D claims, 2024707
Drugs named by CMS18
Total drug cost$312,477
Part D patients320
Dr. Williams' Part D claims by kind of drug, 2024
- Generic535 claims76%
- Brand-name172 claims24%
Dr. Williams' 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. Williams' Part D claims, 2024
- Antibiotics6%40 of 707 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: 5082024: 58515%
Drugs named by CMS: 18 in 2024, 17 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. Eric Alan Williams takes part in Medicare
Dr. Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Eric Alan Williams has 1 publication on record
Dmand AI links 1 paper to Dr. Williams in 2011. Dr. Williams' most frequent co-author is Melvin Weiwen Chiu, MD.
Papers1
Dr. Williams' most frequent co-authors
Recent publications by Dr. Williams
See who Dr. Williams researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Williams 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. Eric Alan Williams has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Williams, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Williams
- 2011
- CMS Stage 1 2012
- Undated
- AAD Fellow
Source: Dmand AI Professional Profile Data
Dr. Eric Alan Williams graduated from Keck School of Medicine of USC
Dr. Williams graduated from Keck School of Medicine of USC in 2003. Dr. Williams is a member of AAD.
- Medical school
- Board certified in dermatology
- Board certified in dermatology
Source: Dmand AI Professional Profile Data
Dr. Eric Alan Williams accepts plans from 2 insurance carriers
Dr. Williams is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Williams accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Eric Alan Williams'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 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) |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Eric Alan Williams
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. Eric Alan Williams' NPI number?
Dr. Eric Alan Williams' NPI number is 1982825238. It was assigned on May 2, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Eric Alan Williams?
Dr. Eric Alan Williams is a dermatologist in Stockton, California. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
Where does Dr. Eric Alan Williams practice?
Dr. Williams practices at 7373 West Ln, Stockton, CA 95210. Dr. Williams' primary practice is Permanente Medical Group Inc in Stockton, California. Dmand AI also links Dr. Williams to 1 group practice or clinic.
What is Dr. Eric Alan Williams' office phone number?
The practice phone on file for Dr. Williams is (209) 476-2000.
What is Dr. Eric Alan Williams' medical license number?
Dr. Williams holds California license A91611.
What medical group is Dr. Eric Alan Williams part of?
Dr. Williams is linked to The Permanente Medical Group, Inc.
Does Dr. Eric Alan Williams accept Medicare?
Yes. CMS lists Dr. Williams as accepting Medicare assignment.
Is Dr. Eric Alan Williams board certified?
Yes. Dr. Williams is board certified in dermatology by the American Board of Dermatology.
Where did Dr. Eric Alan Williams go to medical school?
Dr. Williams graduated from Keck School of Medicine of USC in 2003.
What drugs does Dr. Eric Alan Williams prescribe most?
In 2024 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Fluorouracil, Triamcinolone Acetonide and Calcipotriene.
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How long has Dr. Eric Alan Williams been practicing?
Dr. Williams graduated from medical school in 2003, 23 years ago.
Does Dr. Eric Alan Williams do research?
Dmand AI links 1 publication to Dr. Williams.
Who does Dr. Eric Alan Williams publish with?
Dr. Williams' most frequent co-authors are Melvin Weiwen Chiu, MD (1 shared paper).
What insurance does Dr. Eric Alan Williams accept?
Dr. Williams is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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