Dr. Lewis Joseph Kerwin, MD
- Medicare services, 2024
- 16
- Medicare patients, 2024
- 27
- Part D claims, 2022
- 26
- Hospital affiliations
- 1
- Industry payments
- $111
- Practice address
- 200 W Arbor Dr, San Diego, CA 92103
- Practice phone
- Call (619) 543-6222
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UCSD Hillcrest Medical Center
San Diego, California
Find Dr. Kerwin's 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. Lewis Joseph Kerwin is a psychiatrist in San Diego, California
Dr. Kerwin practices at UCSD Hillcrest Medical Center in San Diego, California.
Dr. Kerwin's NPI, 1952807968, was assigned on March 30, 2018. Dr. Kerwin holds North Carolina license 2022-01515.
- NPI
- 1952807968NPI Registry (opens in a new tab)
- NPI enumeration date
- March 30, 2018
- NPI status
- Active
- Practice phone
- (619) 543-6222
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Lewis Joseph Kerwin practices at UCSD Hillcrest Medical Center in San Diego, California
Dr. Kerwin's primary practice is UCSD Hillcrest Medical Center, at 200 W Arbor Dr, San Diego, CA 92103 in San Diego County. The practice phone is (619) 543-6222.
- UCSD Hillcrest Medical Center200 W Arbor Dr, San Diego, CA 92103 · San Diego CountyPhone(619) 543-6222
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Lewis Joseph Kerwin is affiliated with 2 sites of care and 11 medical groups
Dr. Kerwin's primary practice is UCSD Hillcrest Medical Center in San Diego, California. Dr. Kerwin is also affiliated with Atrium Health Carolinas Medical Center. The medical group on file is Comprehensive Psychiatric Services. Dmand AI also links Dr. Kerwin to 10 more medical groups, each named with a free account.
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. Lewis Joseph Kerwin's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kerwin practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCSD Hillcrest Medical Center | Available with a free account |
| +1 more site and 10 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Lewis Joseph Kerwin is one of 6,803 psychiatrists in California
Psychiatry is Dr. Kerwin's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dmand AI has Dr. Kerwin's licenses on file in 2 states: North Carolina and New Mexico.
Specialties and state licenses
- Psychiatry, North CarolinaPrimary
- New Mexico license
Psychiatrists near Dr. Kerwin
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
Dr. Lewis Joseph Kerwin billed Medicare for 16 services in 2024
CMS data shows 16 Medicare services from Dr. Kerwin across 1 procedure code in 2024, for 27 Medicare patients. Medicare paid $2,400 for them. Every service was in an office.
Dr. Kerwin compared with the California median for psychiatrists, 2024
- Dr. Kerwin
- California median
- Medicare services
- 16vs 11987% below
- Medicare patients
- 27vs 4134% below
- Part D claims
- 26vs 14482% below
Medians across 6,809 psychiatrists in California with Dmand AI profiles that report each measure.
Dr. Kerwin'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kerwin and other psychiatrists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Lewis Joseph Kerwin treated 27 Medicare patients in 2024, average age 67
CMS counts 27 Medicare patients who saw Dr. Kerwin in 2024. 75% of them have anxiety, and 75% have high blood pressure. 48% are also on Medicaid. Their average risk score is 1.49, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Kerwin's median patient age at 34, with 45% women.
Dr. Kerwin's Medicare patients by sex, 2024
- Women1452%
- Men1348%
Chronic conditions among Dr. Kerwin's Medicare patients, 2024
- Anxiety75%
- High blood pressure75%
- Mood disorders75%
- Depression67%
- Schizophrenia and other psychoses67%
- High cholesterol52%
- Alzheimer's and dementia48%
- Tobacco use44%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kerwin's 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
- Women45%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Lewis Joseph Kerwin wrote 26 Medicare Part D claims in 2022
In 2022, Dr. Kerwin wrote 26 Medicare Part D claims. They cover 2 drugs, with $479 in total drug cost. In 2021, CMS named 15 claims across 1 drug.
Dr. Kerwin's 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: 152022: 2673%
Drugs named by CMS: 2 in 2022, 1 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Lewis Joseph Kerwin received $111 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Kerwin from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. ITI, Inc. paid the most, $111.
Companies that paid Dr. Kerwin the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Lewis Joseph Kerwin'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 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| 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. Lewis Joseph Kerwin
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. Lewis Joseph Kerwin's NPI number?
Dr. Lewis Joseph Kerwin's NPI number is 1952807968. It was assigned on March 30, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Lewis Joseph Kerwin?
Dr. Lewis Joseph Kerwin is a psychiatrist in San Diego, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Lewis Joseph Kerwin practice?
Dr. Kerwin practices at 200 W Arbor Dr, San Diego, CA 92103. Dr. Kerwin's primary practice is UCSD Hillcrest Medical Center in San Diego, California. Dmand AI also links Dr. Kerwin to 10 medical groups.
What is Dr. Lewis Joseph Kerwin's office phone number?
The practice phone on file for Dr. Kerwin is (619) 543-6222.
What is Dr. Lewis Joseph Kerwin's medical license number?
Dr. Kerwin holds North Carolina license 2022-01515, one of the licenses on file in 2 states.
Which states has Dr. Lewis Joseph Kerwin been licensed in?
Dmand AI has state licenses on file for Dr. Kerwin in North Carolina and New Mexico.
Which hospitals is Dr. Lewis Joseph Kerwin affiliated with?
Dr. Kerwin is affiliated with Atrium Health Carolinas Medical Center.
What medical group is Dr. Lewis Joseph Kerwin part of?
Dr. Kerwin is linked to Comprehensive Psychiatric Services. Dmand AI links Dr. Kerwin to 10 more medical groups.
Does Dr. Lewis Joseph Kerwin accept Medicare?
Yes. CMS data shows Dr. Kerwin billed Medicare for 16 services in 2024.
How many Medicare patients does Dr. Lewis Joseph Kerwin see?
CMS counts 27 Medicare patients who saw Dr. Kerwin in 2024, with an average age of 67.
Show 4 more questionsShow fewer questions
What services does Dr. Lewis Joseph Kerwin bill to Medicare?
In 2024, Dr. Kerwin's most billed Medicare services were medicare service (G0427).
What drugs does Dr. Lewis Joseph Kerwin prescribe most?
In 2022 Medicare Part D data, Dr. Kerwin's most prescribed drugs by claims were Duloxetine HCl and Venlafaxine HCl ER.
Has Dr. Lewis Joseph Kerwin received payments from drug or device companies?
CMS Open Payments shows $111 in general payments to Dr. Kerwin from 1 company from 2025 to 2025. The largest total came from ITI, Inc.
How long has Dr. Lewis Joseph Kerwin been practicing?
Dr. Kerwin graduated from medical school in 2018, 8 years ago.
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