Nolan Williams
- Medicare services, 2023
- 102
- Part D claims, 2022
- 11
- Hospital affiliations
- 1
- Industry payments
- $2,048
- Medical groups
- 7
- Practice address
- 2500 Alhambra Avenue, Martinez, CA 94553
- Practice phone
- Call (925) 370-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Nolan 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.
Nolan Williams is a psychiatrist in Martinez, California
Nolan Williams practices at Contra Costa Regional Medical Center in Martinez, California, part of State of California.
Nolan Williams' NPI, 1811339641, was assigned on July 22, 2013. Nolan Williams graduated from University of Kansas School of Med (KC/Wich/Sal) in 2012. Nolan Williams holds California license A159440.
- NPI
- 1811339641NPI Registry (opens in a new tab)
- NPI enumeration date
- July 22, 2013
- NPI status
- Active
- Practice phone
- (925) 370-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Nolan Williams practices at Contra Costa Regional Medical Center in Martinez, California
Nolan Williams' primary practice is Contra Costa Regional Medical Center, at 2500 Alhambra Avenue, Martinez, CA 94553 in Contra Costa County. The practice phone is (925) 370-5000.
- Contra Costa Regional Medical Center2500 Alhambra Avenue, Martinez, CA 94553 · Contra Costa CountyPhone(925) 370-5000
Source: Dmand AI Affiliation Data
Nolan Williams is affiliated with 2 sites of care and 7 medical groups
Nolan Williams' primary practice is Contra Costa Regional Medical Center in Martinez, California, part of State of California. The medical group on file is Geisinger. Dmand AI also links Nolan Williams to 6 more medical groups and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Nolan Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Nolan Williams practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Contra Costa Regional Medical Center | Available with a free account |
| +1 more site and 6 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Nolan Williams is one of 6,803 psychiatrists in California
Psychiatry is Nolan Williams' primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Nolan Williams is licensed in California.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
Psychiatrists near Nolan Williams
Counts of psychiatrists 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
Nolan Williams billed Medicare for 102 services in 2023
CMS data shows 102 Medicare services from Nolan Williams across 1 procedure code in 2023. Medicare paid $5,915 for them. Every service was in a facility, such as a hospital, rather than an office.
Nolan Williams' Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 802023: 10228%
Nolan Williams compared with the California median for psychiatrists, 2023
- Nolan Williams
- California median
- Medicare services
- 102vs 11914% below
- Part D claims
- 11vs 14492% below
Medians across 6,809 psychiatrists in California with Dmand AI profiles that report each measure.
Nolan Williams' most billed Medicare procedure codes, 2023
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 Nolan Williams and other psychiatrists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Nolan Williams' patients have a median age of 16
Across all payers, Dmand AI patient panel data puts Nolan Williams' median patient age at 16, with 49% women.
Nolan Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 16
Patient panel by sex, all payers
- Women49%
- Men51%
Source: Dmand AI Patient Panel Data
Nolan Williams wrote 11 Medicare Part D claims in 2022
In 2022, Nolan Williams wrote 11 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $60 in total drug cost. In 2021, CMS named 253 claims across 14 drugs.
Nolan Williams' most prescribed drugs by claims, 2022
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, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 2532022: 1196%
Drugs named by CMS: 1 in 2022, 14 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Nolan Williams received $2,048 in industry payments from 2020 to 2025
CMS Open Payments shows 11 general payments to Nolan Williams from 5 drug and device companies from 2020 to 2025. Consulting fees make up the largest share, 83% of the total. Otsuka Pharmaceutical Development & Commercialization, Inc. paid the most, $1,754.
General payments to Nolan Williams by program year, 2020 to 2025
General payments to Nolan Williams by kind, 2020 to 2025
- Consulting fees$1,71083%
- Food and beverage$33817%
Companies that paid Nolan Williams the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Nolan Williams graduated from University of Kansas School of Med (KC/Wich/Sal)
Nolan Williams graduated from University of Kansas School of Med (KC/Wich/Sal) in 2012.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Nolan 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Nolan 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 Nolan Williams' NPI number?
Nolan Williams' NPI number is 1811339641. It was assigned on July 22, 2013, and it is active in the NPI Registry.
What does Nolan Williams specialize in?
Nolan Williams is a psychiatrist in Martinez, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Nolan Williams practice?
Nolan Williams practices at 2500 Alhambra Avenue, Martinez, CA 94553. Nolan Williams' primary practice is Contra Costa Regional Medical Center in Martinez, California, part of State of California. Dmand AI also links Nolan Williams to 6 medical groups and 1 group practice or clinic.
What is Nolan Williams' office phone number?
The practice phone on file for Nolan Williams is (925) 370-5000.
What is Nolan Williams' medical license number?
Nolan Williams holds California license A159440.
Which hospitals is Nolan Williams affiliated with?
Nolan Williams practices at Contra Costa Regional Medical Center in Martinez, California.
What medical group is Nolan Williams part of?
Nolan Williams is linked to Geisinger. Dmand AI links Nolan Williams to 6 more medical groups.
Does Nolan Williams accept Medicare?
Yes. CMS data shows Nolan Williams billed Medicare for 102 services in 2023.
What services does Nolan Williams bill to Medicare?
In 2023, Nolan Williams' most billed Medicare services were hospital inpatient care (99234).
Where did Nolan Williams go to medical school?
Nolan Williams graduated from University of Kansas School of Med (KC/Wich/Sal) in 2012.
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What drugs does Nolan Williams prescribe most?
In 2022 Medicare Part D data, Nolan Williams' most prescribed drugs by claims were Escitalopram Oxalate.
Has Nolan Williams received payments from drug or device companies?
CMS Open Payments shows $2,048 in general payments to Nolan Williams from 5 companies from 2020 to 2025. The largest total came from Otsuka Pharmaceutical Development & Commercialization, Inc.
How long has Nolan Williams been practicing?
Nolan Williams graduated from medical school in 2012, 14 years ago.
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