Dr. Gretchen G. Webb-Kummer, MD
- Medicare services, 2024
- 902
- Medicare patients, 2024
- 219
- Part D claims, 2024
- 7,442
- Hospital affiliations
- 1
- Industry payments
- $1,476
- Practice address
- 350 S Oak Ave, Oakdale, CA 95361
- Practice phone
- Call (209) 847-3011
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Webb-Kummer'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. Gretchen G. Webb-Kummer is a family medicine physician in Oakdale, California
Dr. Webb-Kummer practices at Oak Valley Hospital in Oakdale, California, part of Oak Valley Hospital District.
Dr. Webb-Kummer's NPI, 1356475347, was assigned on March 14, 2007. Dr. Webb-Kummer graduated from UC Davis School of Medicine in 2004. Dr. Webb-Kummer's California license number on file is A94868.
- NPI
- 1356475347NPI Registry (opens in a new tab)
- NPI enumeration date
- March 14, 2007
- NPI status
- Active
- Practice phone
- (209) 847-3011
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gretchen G. Webb-Kummer practices at Oak Valley Hospital in Oakdale, California
Dr. Webb-Kummer's primary practice is Oak Valley Hospital, at 350 S Oak Ave, Oakdale, CA 95361 in Stanislaus County. The practice phone is (209) 847-3011.
- Oak Valley Hospital350 S Oak Ave, Oakdale, CA 95361 · Stanislaus CountyPhone(209) 847-3011
Source: Dmand AI Affiliation Data
Dr. Gretchen G. Webb-Kummer is affiliated with 1 site of care
Dr. Webb-Kummer's primary practice is Oak Valley Hospital in Oakdale, California, part of Oak Valley Hospital District. Dr. Webb-Kummer's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gretchen G. Webb-Kummer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Webb-Kummer practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Oak Valley Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Oak Valley Hospital District and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Gretchen G. Webb-Kummer is one of 15,680 family medicine physicians in California
Family medicine is Dr. Webb-Kummer's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Webb-Kummer is board certified in family medicine by the American Board of Family Medicine. Dr. Webb-Kummer has a license on file in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute mini-stroke (TIA), acute sinusitis, acute skin infection, aneurysm, ankle or foot injury, anxiety and arthritis among the conditions Dr. Webb-Kummer treats.
Family medicine physicians near Dr. Webb-Kummer
Counts of family medicine 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. Gretchen G. Webb-Kummer billed Medicare for 902 services in 2024
CMS data shows 902 Medicare services from Dr. Webb-Kummer across 9 procedure codes in 2024, for 219 Medicare patients. Medicare paid $62,233 for them. Every service was in an office.
Dr. Webb-Kummer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5382024: 5007%
- Other services
- 2023: 1582024: 30694%
- Lab and pathology
- 2023: 02024: 59
- Tests and treatments
- 2023: 392024: 2438%
- Surgery
- 2023: 02024: 13
Dr. Webb-Kummer compared with the California median for family medicine physicians, 2024
- Dr. Webb-Kummer
- California median
- Medicare services
- 902vs 2463.7 times
- Medicare patients
- 219vs 11886% above
- Part D claims
- 6,863vs 8338.2 times
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Webb-Kummer'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.
Need commercial claims for Dr. Webb-Kummer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Webb-Kummer and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gretchen G. Webb-Kummer treated 219 Medicare patients in 2024, average age 74
CMS counts 219 Medicare patients who saw Dr. Webb-Kummer in 2024. The largest group is 65 to 74, with 105 patients. 69% of them have high cholesterol, and 65% have high blood pressure. 6% are also on Medicaid. Their average risk score is 0.89, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Webb-Kummer's median patient age at 73, with 62% women.
Dr. Webb-Kummer's Medicare patients by age, 2024
Dr. Webb-Kummer's Medicare patients by sex, 2024
- Women13863%
- Men8137%
Chronic conditions among Dr. Webb-Kummer's Medicare patients, 2024
- High cholesterol69%
- High blood pressure65%
- Arthritis30%
- Diabetes27%
- Osteoporosis21%
- Ischemic heart disease16%
- Atrial fibrillation14%
- Mood disorders14%
Share of Medicare patients with each condition. A patient can have several.
Dr. Webb-Kummer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women62%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gretchen G. Webb-Kummer wrote 7,442 Medicare Part D claims in 2024
In 2024, Dr. Webb-Kummer wrote 7,442 Medicare Part D claims for 399 patients. 89% of them were for generic drugs. CMS names the drug for 6,863 of them, across 141 drugs with 11 or more claims each, at $401,045 in total drug cost. In 2023, CMS named 6,621 claims across 131 drugs.
Dr. Webb-Kummer's Part D claims by kind of drug, 2024
- Generic6,610 claims89%
- Brand-name801 claims11%
- Other31 claims0%
Dr. Webb-Kummer's 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.
Drug classes CMS tracks in Dr. Webb-Kummer's Part D claims, 2024
- Opioids5%347 of 7,442 claims
- Antibiotics3%246 of 7,442 claims
- Antipsychotics, patients 65 and over0%21 of 7,442 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6,6212024: 6,8634%
Drugs named by CMS: 141 in 2024, 131 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
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Gretchen G. Webb-Kummer received $1,476 in industry payments from 2016 to 2025
CMS Open Payments shows 90 general payments to Dr. Webb-Kummer from 27 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. GlaxoSmithKline, LLC. paid the most, $452.
General payments to Dr. Webb-Kummer by program year, 2016 to 2025
General payments to Dr. Webb-Kummer by kind, 2016 to 2025
- Food and beverage$1,45999%
- Education$171%
Companies that paid Dr. Webb-Kummer 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. Gretchen G. Webb-Kummer graduated from UC Davis School of Medicine
Dr. Webb-Kummer graduated from UC Davis School of Medicine in 2004. Dr. Webb-Kummer is a member of AAFP.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Gretchen G. Webb-Kummer accepts plans from 15 insurance carriers
Dr. Webb-Kummer is in network with 15 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Michigan
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +7 more carriersWith a free account
Plan types Dr. Webb-Kummer accepts, by number of carriers
- PPO9
- Medicare8
- HMO7
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Gretchen G. Webb-Kummer'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 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) |
| 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. Gretchen G. Webb-Kummer
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. Gretchen G. Webb-Kummer's NPI number?
Dr. Gretchen G. Webb-Kummer's NPI number is 1356475347. It was assigned on March 14, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Gretchen G. Webb-Kummer?
Dr. Gretchen G. Webb-Kummer is a family medicine physician in Oakdale, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Gretchen G. Webb-Kummer practice?
Dr. Webb-Kummer practices at 350 S Oak Ave, Oakdale, CA 95361. Dr. Webb-Kummer's primary practice is Oak Valley Hospital in Oakdale, California, part of Oak Valley Hospital District.
What is Dr. Gretchen G. Webb-Kummer's office phone number?
The practice phone on file for Dr. Webb-Kummer is (209) 847-3011.
What is Dr. Gretchen G. Webb-Kummer's medical license number?
Dr. Webb-Kummer's California license number on file is A94868.
Which hospitals is Dr. Gretchen G. Webb-Kummer affiliated with?
Dr. Webb-Kummer practices at Oak Valley Hospital in Oakdale, California.
Does Dr. Gretchen G. Webb-Kummer accept Medicare?
Yes. CMS data shows Dr. Webb-Kummer billed Medicare for 902 services in 2024.
How many Medicare patients does Dr. Gretchen G. Webb-Kummer see?
CMS counts 219 Medicare patients who saw Dr. Webb-Kummer in 2024, with an average age of 74.
Is Dr. Gretchen G. Webb-Kummer board certified?
Yes. Dr. Webb-Kummer is board certified in family medicine by the American Board of Family Medicine.
What services does Dr. Gretchen G. Webb-Kummer bill to Medicare?
In 2024, Dr. Webb-Kummer's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G0439).
Show 5 more questionsShow fewer questions
Where did Dr. Gretchen G. Webb-Kummer go to medical school?
Dr. Webb-Kummer graduated from UC Davis School of Medicine in 2004.
What drugs does Dr. Gretchen G. Webb-Kummer prescribe most?
In 2024 Medicare Part D data, Dr. Webb-Kummer's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Hydrocodone-Acetaminophen.
Has Dr. Gretchen G. Webb-Kummer received payments from drug or device companies?
CMS Open Payments shows $1,476 in general payments to Dr. Webb-Kummer from 27 companies from 2016 to 2025. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Gretchen G. Webb-Kummer been practicing?
Dr. Webb-Kummer graduated from medical school in 2004, 22 years ago.
What insurance does Dr. Gretchen G. Webb-Kummer accept?
Dr. Webb-Kummer is in network with 15 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
Selling to family medicine practices?
See family medicine physicians in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card