Dr. Janet G. Williams, MD
- Part D claims, 2024
- 28
- Hospital affiliations
- 1
- Industry payments
- $179
- Medical group
- 1
- State license
- 1
- Practice address
- 2040 Camfield Ave, Commerce, CA 90040
- Practice phone
- Call (888) 499-9303
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Altamed Medical Group-Westlake, 3rd Street
Commerce, California
Find Dr. Williams' 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. Janet G. Williams is an OB-GYN in Commerce, California
Dr. Williams practices at Altamed Medical Group-Westlake, 3rd Street in Commerce, California.
Dr. Williams' NPI, 1902007602, was assigned on May 30, 2007. Dr. Williams graduated from Saint Louis University School Of Medicine in 2001. Dr. Williams holds California license A83478.
- NPI
- 1902007602NPI Registry (opens in a new tab)
- NPI enumeration date
- May 30, 2007
- NPI status
- Active
- Practice phone
- (888) 499-9303
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Janet G. Williams practices at Altamed Medical Group-Westlake, 3rd Street in Commerce, California
Dr. Williams' primary practice is Altamed Medical Group-Westlake, 3rd Street, at 2040 Camfield Ave, Commerce, CA 90040 in Los Angeles County. The practice phone is (888) 499-9303.
- Altamed Medical Group-Westlake, 3rd Street2040 Camfield Ave, Commerce, CA 90040 · Los Angeles CountyPhone(888) 499-9303
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Janet G. Williams is affiliated with 2 sites of care and 1 medical group
Dr. Williams' primary practice is Altamed Medical Group-Westlake, 3rd Street in Commerce, California. Dr. Williams is also affiliated with Kaiser Permanente South Bay Medical Center. The medical group on file is Southern California Permanente Medical Group.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Janet G. 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 |
|---|---|
| Altamed Medical Group-Westlake, 3rd Street | 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. Janet G. Williams is one of 4,642 OB-GYNs in California
Obstetrics and gynecology is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Williams is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology. Dr. Williams is licensed in California.
Specialties and state licenses
- Obstetrics and gynecology, CaliforniaPrimary
Clinical focus
Dmand AI lists menopause among the conditions Dr. Williams treats.
OB-GYNs near Dr. Williams
Counts of OB-GYNs 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. Janet G. Williams' patients have a median age of 34
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 34, with 100% 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 34
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. Janet G. Williams wrote 28 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 28 Medicare Part D claims. 61% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $1,642 in total drug cost. In 2020, CMS named 15 claims across 1 drug.
Dr. Williams' Part D claims by kind of drug, 2024
- Generic17 claims61%
- Brand-name11 claims39%
Dr. Williams' most prescribed drugs by claims, 2023
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, 2020 to 2023
- 2020
- 2023
- Claims for drugs CMS names
- 2020: 152023: 147%
Drugs named by CMS: 1 in 2023, 1 in 2020.
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. Janet G. Williams received $179 in industry payments from 2019 to 2023
CMS Open Payments shows 6 general payments to Dr. Williams from 5 drug and device companies from 2019 to 2023. Food and beverage make up the largest share, 57% of the total. Astellas Pharma US Inc paid the most, $76.
General payments to Dr. Williams by program year, 2019 to 2023
General payments to Dr. Williams by kind, 2019 to 2023
- Food and beverage$10357%
- Education$7642%
Companies that paid Dr. Williams the most, 2019 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Janet G. Williams has 1 award and honors on record
Dmand AI lists 1 award for Dr. Williams, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Williams
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Janet G. Williams graduated from Saint Louis University School Of Medicine
Dr. Williams graduated from Saint Louis University School Of Medicine in 2001.
- Medical school
- Board certified in obstetrics & gynecology
Source: Dmand AI Professional Profile Data
Sources for Dr. Janet G. 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 DataDmand AI Org Hierarchy 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) |
| 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. Janet G. 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. Janet G. Williams' NPI number?
Dr. Janet G. Williams' NPI number is 1902007602. It was assigned on May 30, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Janet G. Williams?
Dr. Janet G. Williams is an OB-GYN in Commerce, California. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Janet G. Williams practice?
Dr. Williams practices at 2040 Camfield Ave, Commerce, CA 90040. Dr. Williams' primary practice is Altamed Medical Group-Westlake, 3rd Street in Commerce, California.
What is Dr. Janet G. Williams' office phone number?
The practice phone on file for Dr. Williams is (888) 499-9303.
What is Dr. Janet G. Williams' medical license number?
Dr. Williams holds California license A83478.
Which hospitals is Dr. Janet G. Williams affiliated with?
Dr. Williams is affiliated with Kaiser Permanente South Bay Medical Center.
What medical group is Dr. Janet G. Williams part of?
Dr. Williams is linked to Southern California Permanente Medical Group.
Is Dr. Janet G. Williams board certified?
Yes. Dr. Williams is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology.
Where did Dr. Janet G. Williams go to medical school?
Dr. Williams graduated from Saint Louis University School Of Medicine in 2001.
What drugs does Dr. Janet G. Williams prescribe most?
In 2023 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Estradiol.
Has Dr. Janet G. Williams received payments from drug or device companies?
CMS Open Payments shows $179 in general payments to Dr. Williams from 5 companies from 2019 to 2023. The largest total came from Astellas Pharma US Inc.
How long has Dr. Janet G. Williams been practicing?
Dr. Williams graduated from medical school in 2001, 25 years ago.
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