Dr. Dennis Alwen, MD
- Medicare services, 2021
- 28
- Industry payments
- $1,850
- Affiliated sites
- 1
- Medical groups
- 3
- Insurance carriers
- 7
- Practice address
- 5 Medical Plaza Dr Suite 250 Suite 250, Roseville, CA 95661-2868
- Practice phone
- Call (916) 782-2229
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Associates In Womens Health Care
Women's health practice · Roseville, California
Find Dr. Alwen'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. Dennis Alwen is a gynecology physician in Clearlake, California
Dr. Alwen practices at Associates In Womens Health Care in Roseville, California.
Dr. Alwen's NPI, 1043579808, was assigned on May 14, 2012. Dr. Alwen graduated from Ohio State College of Medicine in 2010. Dr. Alwen's California license number on file is A121235.
- NPI
- 1043579808NPI Registry (opens in a new tab)
- NPI enumeration date
- May 14, 2012
- NPI status
- Active
- Practice phone
- (916) 782-2229
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Dennis Alwen practices in Roseville and Clearlake
Dr. Alwen's primary practice is Associates in Womens Health Care, at 5 Medical Plaza Dr Suite 250 Suite 250, Roseville, CA 95661-2868. The practice phone is (916) 782-2229. The NPI Registry lists Dr. Alwen's practice address as 15630 18th Ave, Clearlake, CA 95422.
- Associates in Womens Health CarePrimary5 Medical Plaza Dr Suite 250 Suite 250, Roseville, CA 95661-2868Phone(916) 782-2229
- NPI Registry address15630 18th Ave, Clearlake, CA 95422 · Lake CountyPhone(818) 518-5980
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Dennis Alwen is affiliated with 1 site of care and 3 medical groups
Dr. Alwen's primary practice is Associates In Womens Health Care in Roseville, California. The medical group on file is PIH Health Physicians. Dmand AI also links Dr. Alwen to 2 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Dennis Alwen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Alwen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Associates In Womens Health Care | Available with a free account |
| +2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Dennis Alwen is one of 297 gynecology physicians in California
Gynecology is Dr. Alwen's primary specialty in the NPI Registry, under taxonomy code 207VG0400X. Dr. Alwen is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology. Dmand AI has Dr. Alwen's licenses on file in 2 states: California and Utah.
Specialties and state licenses
- Gynecology, CaliforniaPrimary
- Utah license
Gynecology physicians near Dr. Alwen
Counts of gynecology physicians 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. Dennis Alwen billed Medicare for 28 services in 2021
CMS data shows 28 Medicare services from Dr. Alwen across 2 procedure codes in 2021, all of them office visits. Medicare paid $3,361 for them. Every service was in an office.
Dr. Alwen's Medicare services by type, 2017 to 2021
- 2017
- 2021
- Office and hospital visits
- 2017: 172021: 2865%
Dr. Alwen compared with the California median for gynecology physicians, 2021
- Dr. Alwen
- California median
- Medicare services
- 28vs 10473% below
Medians across 253 gynecology physicians in California with Dmand AI profiles that report each measure.
Dr. Alwen's most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Alwen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Alwen and other gynecology physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Dennis Alwen's patients have a median age of 44
Across all payers, Dmand AI patient panel data puts Dr. Alwen's median patient age at 44, with 86% women.
Dr. Alwen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women86%
- Men14%
Source: Dmand AI Patient Panel Data
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Dr. Dennis Alwen received $1,850 in industry payments from 2016 to 2025
CMS Open Payments shows 105 general payments to Dr. Alwen from 23 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Abbvie Inc. paid the most, $465.
General payments to Dr. Alwen by program year, 2016 to 2025
General payments to Dr. Alwen by kind, 2016 to 2025
- Food and beverage$1,83199%
- Education$191%
Companies that paid Dr. Alwen the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Dennis Alwen graduated from Ohio State College of Medicine
Dr. Alwen graduated from Ohio State College of Medicine in 2010.
- Medical school
- Board certified in obstetrics & gynecology
Source: Dmand AI Professional Profile Data
Dr. Dennis Alwen accepts plans from 7 insurance carriers
Dr. Alwen is in network with 7 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- Humana
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
Plan types Dr. Alwen accepts, by number of carriers
- Medicare7
- PPO7
- HMO4
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Dennis Alwen'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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Dennis Alwen
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. Dennis Alwen's NPI number?
Dr. Dennis Alwen's NPI number is 1043579808. It was assigned on May 14, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Dennis Alwen?
Dr. Dennis Alwen is a gynecology physician in Clearlake, California. The primary specialty in the NPI Registry is Gynecology Physician (taxonomy code 207VG0400X).
Where does Dr. Dennis Alwen practice?
Dr. Alwen practices at 5 Medical Plaza Dr Suite 250 Suite 250, Roseville, CA 95661-2868. Dr. Alwen also practices at 15630 18th Ave, Clearlake, CA 95422. Dr. Alwen's primary practice is Associates In Womens Health Care in Roseville, California. Dmand AI also links Dr. Alwen to 2 medical groups.
What is Dr. Dennis Alwen's office phone number?
The practice phone on file for Dr. Alwen is (916) 782-2229.
What is Dr. Dennis Alwen's medical license number?
Dr. Alwen's California license number on file is A121235, one of the licenses on file in 2 states.
Which states has Dr. Dennis Alwen been licensed in?
Dmand AI has state licenses on file for Dr. Alwen in California (2012 to 2025) and Utah (2025 to 2028).
What medical group is Dr. Dennis Alwen part of?
Dr. Alwen is linked to PIH Health Physicians. Dmand AI links Dr. Alwen to 2 more medical groups.
Does Dr. Dennis Alwen accept Medicare?
Yes. CMS data shows Dr. Alwen billed Medicare for 28 services in 2021.
Is Dr. Dennis Alwen board certified?
Yes. Dr. Alwen is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology.
What services does Dr. Dennis Alwen bill to Medicare?
In 2021, Dr. Alwen's most billed Medicare services were office visit, new patient (99204) and office visit, new patient (99203).
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Where did Dr. Dennis Alwen go to medical school?
Dr. Alwen graduated from Ohio State College of Medicine in 2010.
Has Dr. Dennis Alwen received payments from drug or device companies?
CMS Open Payments shows $1,850 in general payments to Dr. Alwen from 23 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Dennis Alwen been practicing?
Dr. Alwen graduated from medical school in 2010, 16 years ago.
What insurance does Dr. Dennis Alwen accept?
Dr. Alwen is in network with 7 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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