Dr. Roger William Lewis, MD
- Medicare services, 2024
- 181
- Medicare patients, 2024
- 102
- Part D claims, 2024
- 247
- Hospital affiliations
- 1
- Industry payments
- $3,150
- Practice address
- 1729 N Olive Ave, Turlock, CA 95382
- Practice phone
- Call (209) 634-9034
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
OB GYN Associates of Turlock a Medical Group Inc
Turlock, California
Find Dr. Lewis' 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. Roger William Lewis is an OB-GYN in Turlock, California
Dr. Lewis practices at OB GYN Associates of Turlock a Medical Group Inc in Turlock, California.
Dr. Lewis' NPI, 1699876086, was assigned on September 26, 2006. Dr. Lewis graduated from Spencer Fox Eccles School of Medicine in 1981. Dr. Lewis holds California license G65192.
- NPI
- 1699876086NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1850318767
- NPI enumeration date
- September 26, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (209) 634-9034
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Roger William Lewis practices at OB GYN Associates of Turlock a Medical Group Inc in Turlock, California
Dr. Lewis' primary practice is OB GYN Associates of Turlock a Medical Group Inc, at 1729 N Olive Ave, Turlock, CA 95382 in Stanislaus County. The practice phone is (209) 634-9034.
- OB GYN Associates of Turlock a Medical Group Inc1729 N Olive Ave, Turlock, CA 95382 · Stanislaus CountyPhone(209) 634-9034
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Roger William Lewis is affiliated with 4 sites of care and 2 medical groups
Dr. Lewis' primary practice is OB GYN Associates of Turlock a Medical Group Inc in Turlock, California. Dr. Lewis is also affiliated with Emanuel Medical Center. The medical group on file is Ob Hospitalist Group. Dmand AI also links Dr. Lewis to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Roger William Lewis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lewis practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| OB GYN Associates of Turlock a Medical Group Inc | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Roger William Lewis is one of 4,642 OB-GYNs in California
Obstetrics and gynecology is Dr. Lewis' primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Lewis is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology. Dmand AI has Dr. Lewis' licenses on file in 2 states: California and Ohio.
Specialties and state licenses
- Obstetrics and gynecology, CaliforniaPrimary
- Ohio license
Clinical focus
Dmand AI lists menopause, vaginal infection and vaginal repair among the conditions Dr. Lewis treats.
OB-GYNs near Dr. Lewis
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. Roger William Lewis billed Medicare for 181 services in 2024
CMS data shows 181 Medicare services from Dr. Lewis across 6 procedure codes in 2024, for 102 Medicare patients. Medicare paid $11,952 for them. Every service was in an office.
Dr. Lewis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 492024: 9798%
- Imaging
- 2023: 702024: 4831%
- Other services
- 2023: 242024: 3650%
Dr. Lewis compared with the California median for OB-GYNs, 2024
- Dr. Lewis
- California median
- Medicare services
- 181vs 583.1 times
- Medicare patients
- 102vs 5296% above
- Part D claims
- 193vs 355.5 times
Medians across 3,823 OB-GYNs in California with Dmand AI profiles that report each measure.
Dr. Lewis' 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.
Need commercial claims for Dr. Lewis?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Lewis and other OB-GYNs in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Roger William Lewis treated 102 Medicare patients in 2024, average age 71
CMS counts 102 Medicare patients who saw Dr. Lewis in 2024. The largest group is 65 to 74, with 52 patients. 74% of them have high cholesterol, and 66% have high blood pressure. 36% are also on Medicaid. Their average risk score is 1.14, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Lewis' median patient age at 37, with 99% women.
Dr. Lewis' Medicare patients by age, 2024
Chronic conditions among Dr. Lewis' Medicare patients, 2024
- High cholesterol74%
- High blood pressure66%
- Arthritis42%
- Diabetes31%
- Anxiety29%
- Mood disorders25%
- Depression23%
- Asthma22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lewis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 37
Patient panel by sex, all payers
- Women99%
- Men1%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Roger William Lewis wrote 247 Medicare Part D claims in 2024
In 2024, Dr. Lewis wrote 247 Medicare Part D claims for 67 patients. 89% of them were for generic drugs. CMS names the drug for 193 of them, across 8 drugs with 11 or more claims each, at $10,454 in total drug cost. In 2023, CMS named 88 claims across 3 drugs.
Dr. Lewis' Part D claims by kind of drug, 2024
- Generic221 claims89%
- Brand-name26 claims11%
Dr. Lewis' 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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 882024: 193119%
Drugs named by CMS: 8 in 2024, 3 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. Roger William Lewis takes part in Medicare
Dr. Lewis accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Roger William Lewis received $3,150 in industry payments from 2016 to 2025
CMS Open Payments shows 146 general payments to Dr. Lewis from 29 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 85% of the total. Intuitive Surgical, Inc. paid the most, $602.
General payments to Dr. Lewis by program year, 2016 to 2025
General payments to Dr. Lewis by kind, 2016 to 2025
- Food and beverage$2,69185%
- Travel and lodging$2739%
- Education$1866%
Companies that paid Dr. Lewis 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. Roger William Lewis has 1 award and honors on record
Dmand AI lists 1 award for Dr. Lewis.
Awards and honors for Dr. Lewis
- Undated
- ACOG Fellow
Source: Dmand AI Professional Profile Data
Dr. Roger William Lewis graduated from Spencer Fox Eccles School of Medicine
Dr. Lewis graduated from Spencer Fox Eccles School of Medicine in 1981. Dr. Lewis is a member of American College of Obstetricians and Gynecologists.
- Medical school
- Board certified in obstetrics & gynecology
Source: Dmand AI Professional Profile Data
Dr. Roger William Lewis accepts plans from 15 insurance carriers
Dr. Lewis is in network with 15 carriers, including Aetna, United Healthcare and Elevance. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Elevance
- HCSC
- Humana
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- Regence Health Plans
- +7 more carriersWith a free account
Plan types Dr. Lewis accepts, by number of carriers
- PPO10
- HMO7
- Medicare6
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Roger William Lewis'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 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)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) |
| 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 |
| 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. Roger William Lewis
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. Roger William Lewis' NPI number?
Dr. Roger William Lewis' NPI number is 1699876086. It was assigned on September 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Roger William Lewis?
Dr. Roger William Lewis is an OB-GYN in Turlock, California. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Roger William Lewis practice?
Dr. Lewis practices at 1729 N Olive Ave, Turlock, CA 95382. Dr. Lewis' primary practice is OB GYN Associates of Turlock a Medical Group Inc in Turlock, California. Dmand AI also links Dr. Lewis to 2 group practices and clinics and 1 medical group.
What is Dr. Roger William Lewis' office phone number?
The practice phone on file for Dr. Lewis is (209) 634-9034.
What is Dr. Roger William Lewis' medical license number?
Dr. Lewis holds California license G65192, one of the licenses on file in 2 states.
Which states has Dr. Roger William Lewis been licensed in?
Dmand AI has state licenses on file for Dr. Lewis in California (1989 to 2026) and Ohio (1984 to 1990).
Which hospitals is Dr. Roger William Lewis affiliated with?
Dr. Lewis is affiliated with Emanuel Medical Center.
What medical group is Dr. Roger William Lewis part of?
Dr. Lewis is linked to Ob Hospitalist Group. Dmand AI links Dr. Lewis to 1 more medical group.
Does Dr. Roger William Lewis accept Medicare?
Yes. CMS data shows Dr. Lewis billed Medicare for 181 services in 2024, and Dr. Lewis accepts Medicare assignment.
How many Medicare patients does Dr. Roger William Lewis see?
CMS counts 102 Medicare patients who saw Dr. Lewis in 2024, with an average age of 71.
Show 7 more questionsShow fewer questions
Is Dr. Roger William Lewis board certified?
Yes. Dr. Lewis is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology.
What services does Dr. Roger William Lewis bill to Medicare?
In 2024, Dr. Lewis' most billed Medicare services were office visit, established patient (99213), ultrasound (76830) and office visit, new patient (99203).
Where did Dr. Roger William Lewis go to medical school?
Dr. Lewis graduated from Spencer Fox Eccles School of Medicine in 1981.
What drugs does Dr. Roger William Lewis prescribe most?
In 2024 Medicare Part D data, Dr. Lewis' most prescribed drugs by claims were Estradiol, Tolterodine Tartrate ER and Prempro.
Has Dr. Roger William Lewis received payments from drug or device companies?
CMS Open Payments shows $3,150 in general payments to Dr. Lewis from 29 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Roger William Lewis been practicing?
Dr. Lewis graduated from medical school in 1981, 45 years ago.
What insurance does Dr. Roger William Lewis accept?
Dr. Lewis is in network with 15 carriers, including Aetna, United Healthcare and Elevance. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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